Wireless device

The present invention relates to a wireless device.

In recent years, an interface standard called DigRF has been established in the field of mobile terminals and the like. This DigRF is a standard that defines the interoperability between the baseband processing unit and the RF-IC unit included in the mobile terminal. FIG. 7 is a diagram showing the configuration of a wireless device compatible with the DigRF v3 standard.

As shown in FIG. 7, the radio device 1 has a baseband processing unit 10 and an RF-IC unit 20. The baseband processing unit 10 has interface units 10a and 10b, and the RF-IC unit 20 has interface units 20a and 20b, DAC21 and ADC22.

The interface units 10a and 10b are IQ data (Tx I / Q Data, Rx I / Q Data) and control data (Control Data, RF-IC Response) including phase and amplitude information via the Tx path and Rx path. ) Is a processing unit that executes transmission / reception with the RF-IC unit 20. The interface units 10a and 10b convert IQ data and control data into LVDS signals corresponding to the Tx path and Rx path when transmitting and receiving IQ data and control data.

The interface units 20a and 20b are processing units that execute IQ data including phase and amplitude information and control data transmission / reception with the baseband processing unit 10 via the Tx path and the Rx path. The interface units 20a and 20b convert IQ data and control data into LVDS signals corresponding to the Tx path and Rx path when transmitting and receiving IQ data and control data.

When the interface unit 20a acquires IQ data from the baseband processing unit 10 via the Tx path, the interface unit 20a outputs the acquired IQ data to the DAC 21. When the interface 20b acquires IQ data from ADC22, the interface 20b outputs the IQ data to the baseband processing unit 10 via the Rx path.

The DAC 21 is a processing unit that converts a digital signal (IQ data) output from the interface 20a into an analog signal and outputs the converted analog signal to the antenna. The ADC22 converts the analog signal acquired from the antenna into a digital signal (IQ data), and outputs the converted digital signal to the interface unit 20b.

Next, the communication formats of the Tx path and the Rx path will be described. FIG. 8 is a diagram for explaining a conventional Tx path and Rx path communication format. The data transferred on the Tx path and the Rx path has Sync, Header, and Payload. Of these, Sync is a pattern bit that detects 16-bit synchronization, and Header is the first 8-bit bit that notifies the type of data.

Payload is an 8-bit to 512-bit data bit. The interface unit stores IQ data in Payload when transferring IQ data on the Tx path and Rx path. In DigRFv3, the Payload bit size of the Tx path is set to 96 bits, and the Payload bit size of the Rx path is set to 256 bits. As shown in the upper part of FIG. 8, on the Tx path, when IQ data is transmitted, the data is transferred every 120 bits. Further, as shown in the middle part of FIG. 8, on the Rx path, when IQ data is transmitted, the data is transferred every 280 bits.

In addition, the interface unit stores the control data in the Payload when transmitting the control data on the Tx path and the Rx path. When storing control data in Payload, for example, the bit size of Payload is 32 bits.

As shown in the lower part of FIG. 8, the interface unit transfers control data between IQ data. If the timing of transferring IQ data and the timing of transferring control data overlap, wait for the transfer of the previously transferred data to be completed, and then perform the other transfer.

Next, the configurations of the interfaces 10a and 10b shown in FIG. 7 will be described. FIG. 9 is a diagram showing a configuration of a conventional interface unit. As shown in FIG. 9, the interface unit 10a includes a Mux processing unit 11, a P / S conversion processing unit 12, a SyncMux processing unit 13, and an LVDS driver 14. The interface unit 10b includes an LVDS receiver 15, a sampling processing unit 16, a SyncDetect processing unit 17, an S / P conversion processing unit 18, and a Detect processing unit 19.

The Mux processing unit 11 is a processing unit that multiplexes the acquired IQ data and control data when IQ data and control data are acquired. The Mux processing unit 11 outputs the multiplexed data to the P / S conversion processing unit 12.

The P / S (Parallel / Serial) conversion processing unit 12 is a processing unit that executes Serial conversion when multiplexed data is acquired from the Mux processing unit 11. The P / S conversion processing unit 12 outputs the data on which the Serial conversion has been executed to the SyncMux processing unit 13.

The SyncMux processing unit 13 is a processing unit that adds Sync to the acquired data when the serial-converted data is acquired from the P / S conversion processing unit 12. The SyncMux processing unit 13 outputs the data to which Sync is added to the LVDS driver 14.

The LVDS driver 14 is a processing unit that converts the acquired data into an LVDS signal when the data to which Sync is added is acquired from the SyncMux processing unit 13. Here, the LVDS signal includes Sync, Header, and Payload shown in FIG. The LVDS driver 14 stores IQ data or control data in Payload and transfers the data.

The LVDS receiver 15 is a processing unit that receives an LVDS signal from the RF-IC unit 20 and converts the received LVDS signal into a single signal. The LVDS receiver 15 outputs the converted Single signal to the sampling processing unit 16.

The sampling processing unit 16 is a processing unit that executes sampling processing for the Single signal when the Single signal is acquired from the LVDS receiver 15. The sampling processing unit 16 outputs data as a sampling result to the SyncDetect processing unit 17.

When the sampling result data is acquired from the sampling processing unit 16, the SyncDetect processing unit 17 detects Sync from the acquired data and performs synchronization by performing a match comparison with the Sync pattern specified in the DigRF V3 standard. It is a department. The SyncDetect processing unit 17 outputs the synchronized data to the S / P conversion processing unit 18.

The S / P (Serial / Parallel) conversion processing unit 18 is a processing unit that performs Parallel conversion processing of the acquired data when data is acquired from the SyncDetect processing unit 17. The S / P conversion processing unit 18 outputs the data subjected to the Parallel conversion processing to the Detect processing unit 19.

When the Detect processing unit 19 acquires data from the S / P conversion processing unit 18, it analyzes the Header included in the acquired data and controls the IQ data (Rx I / Q Data) stored in the data payload. Extract data (RF-IC Response). The Detect processing unit 19 separates IQ data and control data and outputs them to an external device.

By the way, in addition to the wireless device 1 shown in FIG. 7, a wireless device using a technique called diversity has been devised. For example, diversity is a technique in which the signal of an antenna having an excellent radio wave condition is preferentially used for the same radio signal received by a plurality of antennas.

FIG. 10 is a diagram showing a configuration of a wireless device using diversity. As shown in FIG. 10, the radio device 2 has a baseband processing unit 30 and an RF-IC unit 40. Further, the baseband processing unit 30 includes interface units 30a and 30b and a DeMUX processing unit 31. The RF-IC unit 40 includes an interface unit 40a, 40b, a MUX processing unit 41, a DAC 42, and an ADC 43, 44. The wireless device 2 shown in FIG. 10 transfers the signal received from each antenna from the RF-IC unit 40 to the baseband processing unit 30 in one lane.

When the IQ data or control data is acquired, the interface unit 30a is a processing unit that outputs the IQ data or control data to the RF-IC unit 40 via the Tx path by converting the acquired data into an LVDS signal. Is.

The interface unit 30b is a processing unit that receives an LVDS signal from the RF-IC unit 40 via the Rx path and extracts control data and IQ data received by each antenna Ant1 and Ant2 from the received signal. The interface unit 30b outputs the IQ data received by each antenna Ant1 and Ant2 to the DeMux processing unit 31. In addition, the interface unit 30b outputs control data to an external device.

The DeMux processing unit 31 is a processing unit that separates the IQ data received by the antenna Ant1 and the IQ data received by the antenna Ant2 and outputs the separated IQ data separately.

The interface unit 40a is a processing unit that outputs IQ data included in the acquired LVDS signal to the DAC 42 when the LVDS signal is acquired from the baseband processing unit 30 via the Tx path.

When the interface unit 40b acquires the data or control data output from the Mux processing unit 41, the interface unit 40b converts the acquired data into an LVDS signal to perform baseband processing of the IQ data and control data via the Rx path. This is a processing unit that outputs to unit 30.

The Mux processing unit 41 synthesizes the IQ data output from the ADC 43 (IQ data received from Ant1) and the IQ data output from the ADC 44 (IQ data received from Ant2), and outputs the combined data to the interface unit 40b. It is a processing unit to be processed.

The DAC 42 is a processing unit that converts a digital signal (IQ data) output from the interface unit 40a into an analog signal and outputs the converted analog signal to the antenna Ant1.

The ADC 43 is a processing unit that converts an analog signal acquired from the antenna Ant1 into a digital signal (IQ data) and outputs the converted digital signal to the interface unit 40b. The ADC44 is a processing unit that converts an analog signal acquired from the antenna Ant2 into a digital signal (IQ data) and outputs the converted digital signal to the interface unit 40b.

FIG. 11 is a diagram showing a communication format of the Rx path at the time of diversity one lane. The upper part of FIG. 11 shows the LVDS signal of the Rx path when data is received by the antenna Ant1 or the antenna Ant2. At the time of such single reception, the bit interval of the LVDS signal is the same bit interval (370 bit interval) as in FIG.

The lower part of FIG. 11 shows the LVDS signal of the Rx path when the IQ data of the antennas Ant1 and Ant2 are multiplexed and transferred at the time of diversity. As shown in the lower part of FIG. 11, in the diversity one lane, the interface unit 40b alternately transfers IQ data on the antenna Ant1 side and the antenna Ant2 side in chronological order. Further, the bit interval of each LVDS signal is 45 bits, which is narrower than the bit interval at the time of single reception.

<p num="0034"><patcit num="1"><text>Japanese Unexamined Patent Publication No. 2007-28569</text></patcit><patcit num="2"><text>JP-A-2007-96762</text></patcit></p>

<p num="0035"> However, the above-mentioned conventional wireless device has a problem that data delay occurs when IQ data and control data received from a plurality of antennas are transferred in one lane. FIG. 12 is a diagram for explaining a problem of the prior art.</p><p num="0036"> As shown in the lower part of FIG. 12, at the time of diversity one lane, since the interval between each LVDS signal including IQ data is narrow, it is not possible to insert and transfer the control data as it is. Therefore, when transferring control data, it is necessary to secure a bit width sufficient for inserting control data by delaying the LVDS signal including IQ data. Comparing the middle and lower rows of FIG. 12, the insertion of the control data causes a delay in the IQ data and the control data after the control data.</p><p num="0037"> When a data delay as shown in FIG. 12 occurs, for example, a delay occurs in the control data transferred from the receiving side to the transmitting side, and a buffer overflow occurs on the transmitting side that waits for the reception of the control data and performs processing. May occur. Therefore, solving the problem of data delay becomes an important issue.</p><p num="0038"> The disclosed technique has been made in view of the above, and an object of the present invention is to provide a wireless device capable of solving the problem of data delay.</p>

<p num="0039"> This wireless device acquires the data received by the first antenna and the data received by the second antenna, respectively, and obtains the difference value between the data received by the first antenna and the data received by the second antenna. It is a requirement to have a difference calculation unit for calculation, and a transfer unit for transferring the data received by the first antenna and the difference value to the reception unit.</p>

<p num="0040"> According to this wireless device, it is possible to prevent the occurrence of data delay even if the data received from a plurality of antennas is transferred in one lane.</p>

<figref num="1">FIG. 1 is a functional block diagram showing a configuration of a wireless device according to this embodiment.</figref><figref num="2">FIG. 2 is a diagram showing a communication format of the Rx path according to this embodiment.</figref><figref num="3">FIG. 3 is a diagram showing the configuration of the difference data generation unit.</figref><figref num="4">FIG. 4 is a diagram showing the configuration of the IQ data restoration unit.</figref><figref num="5">FIG. 5 is a flowchart showing a processing procedure of the RF-IC unit according to this embodiment.</figref><figref num="6">FIG. 6 is a flowchart showing a processing procedure of the IQ data restoration unit according to this embodiment.</figref><figref num="7">FIG. 7 is a diagram showing the configuration of a wireless device compatible with the DigRF v3 standard.</figref><figref num="8">FIG. 8 is a diagram for explaining a conventional Tx path and Rx path communication format.</figref><figref num="9">FIG. 9 is a diagram showing a configuration of a conventional interface unit.</figref><figref num="10">FIG. 10 is a diagram showing a configuration of a wireless device using diversity.</figref><figref num="11">FIG. 11 is a diagram showing a communication format of the Rx path at the time of diversity one lane.</figref><figref num="12">FIG. 12 is a diagram for explaining a problem of the prior art.</figref>

Hereinafter, examples of the wireless device disclosed in the present application will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

<p num="0043"> In the following description, the case where the wireless device receives the signal wave from the base station using the antennas Ant1 and Ant2 will be described, but the present invention is not limited to this. The wireless device may receive a signal wave from the base station using an antenna other than the antennas Ant1 and Ant2.</p><p num="0044"> First, an outline of the wireless device according to this embodiment will be described. Since the antennas Ant1 and Ant2 originally receive the same signal wave from the base station, there is no big difference between the IQ data received by the antenna Ant1 and the IQ data received by the antenna Ant2, and they have a correlation with each other. The difference between the IQ data received by the antennas Ant1 and Ant2 is mainly the phase difference caused by the difference in the propagation path.</p><p num="0045"> Therefore, in the wireless device according to this embodiment, the difference value between the IQ data received by the antenna Ant1 and the IQ data received by the antenna Ant2 is calculated in time series on the RF-IC section side, and the IQ received by the antenna Ant2 is calculated. Instead of the data, the difference value is transferred to the baseband processing unit side. Then, the radio device restores the IQ data of the antenna Ant2 based on the difference value and the IQ data of the antenna Ant1 on the baseband processing unit side.</p><p num="0046"> The amount of difference value data is smaller than the IQ data received by the antenna Ant2. Therefore, even if the wireless device transfers IQ data and control data received from a plurality of antennas in one lane, the bit width of the control data can be secured, so that the occurrence of data delay can be prevented.</p><p num="0047"> Next, the configuration of the wireless device according to this embodiment will be described. FIG. 1 is a functional block diagram showing the configuration of the wireless device 100 according to this embodiment. As shown in FIG. 1, the radio device 100 includes a baseband processing unit 110 and an RF-IC unit 150. The baseband processing unit 110 and the RF-IC unit 150 are connected to each other by a Tx path and an Rx path in the same manner as in the prior art.</p><p num="0048"> The baseband processing unit 110 includes interface units 120a and 120b, a DeMUX processing unit 130, and an IQ data restoration unit 140. The RF-IC unit 150 includes an interface unit 150a, 150b, a DAC160, an ADC170, 180, a difference data generation unit 190, and a MUX processing unit 200.</p><p num="0049"> Each processing unit included in the baseband processing unit 110 will be described. When IQ data or control data is acquired, the interface unit 120a converts the acquired data into an LVDS signal to convert the acquired data into IQ data (Tx I / Q Data) or control data (Control Data) via the Tx path. Is a processing unit that outputs data to the RF-IC unit 150.</p><p num="0050"> The interface unit 120b receives an LVDS signal from the RF-IC unit 150 via the Rx path, and from the received signal, control data, difference data, and IQ data received by the antenna Ant1 (Ant1 Rx I / Q). It is a processing unit that extracts Data). The interface unit 120b outputs the IQ data received by the antenna Ant1 to the DeMUX processing unit 130, and outputs the difference value to the IQ data restoration unit 140. The interface unit 120b outputs control data to an external device.</p><p num="0051"> When the signal acquired from the interface unit 150b includes the IQ data (Ant2 Rx I / Q Data) received by the antenna Ant2, the interface unit 120b processes the IQ data received by the antenna Ant2 by DeMUX processing. Output to unit 130.</p><p num="0052"> The DeMUX processing unit 130 is a processing unit that outputs the received IQ data to the IQ data restoration unit 140 and an external device when the IQ data received by the antenna Ant1 is received from the interface unit 120b.</p><p num="0053"> If the data received from the interface unit 120b includes the IQ data received by the antenna Ant1 and the IQ data received by the antenna Ant2, the DeMUX processing unit 130 separates each IQ data. Then, the DeMUX processing unit 130 outputs each IQ data received by the antennas Ant1 and Ant2 to the IQ data restoration unit 140, and outputs the IQ data received by the antenna Ant1 to an external device.</p><p num="0054"> The IQ data restoration unit 140 is a processing unit that restores the IQ data of the antenna Ant2 based on the IQ data of the antenna Ant1 and the difference value. For example, the IQ data restoration unit 140 adds the IQ data (IQ data arranged in chronological order) and the difference value (difference value arranged in chronological order) of the antenna Ant1 for each time, thereby adding the IQ data of the antenna Ant2. Restore IQ data.</p><p num="0055"> The IQ data restoration unit 140 outputs the IQ data of the restored antenna Ant2 to an external device. When the IQ data restoration unit 140 acquires the IQ data of the antenna Ant2 from the DeMUX processing unit 130, the IQ data restoration unit 140 does not perform the restoration processing and outputs the acquired IQ data to an external device.</p><p num="0056"> Each processing unit included in the RF-IC unit 150 will be described. The interface unit 150a is a processing unit that outputs IQ data included in the acquired LVDS signal to the DAC 160 when the LVDS signal is acquired from the baseband processing unit 110 via the Tx path.</p><p num="0057"> The interface unit 150b converts the acquired data into an LVDS signal when the data, control data, and difference value output from the MUX processing unit 200 are acquired, so that the IQ data and control data can be obtained via the Rx path. The difference value is the baseband processing unit.</p><p num="0058"> FIG. 2 is a diagram showing a communication format of the Rx path according to this embodiment. When the interface unit 150b acquires the IQ data of the antenna Ant1, it stores the IQ data in the Payload, adds Sync and Header, and transfers the IQ data to the baseband processing unit 110. The bit width when transferring IQ data of antenna Ant1 is 280 bits.</p><p num="0059"> When the interface unit 150b acquires the difference value, the interface unit 150b stores the difference value in the 128-bit Payload, adds Sync and Header, and transfers the difference value to the baseband processing unit 110. The bit width when transferring the difference value is 152 bits.</p><p num="0060"> As shown in FIG. 2, the interface unit 150b alternately transfers the LVDS signal storing IQ data and the LVDS signal storing the difference value. As shown in Fig. 2, after transferring the LVDS signal that stores the difference value, 172 bits are opened and the LVDS signal that stores the IQ data is transmitted. If such a bit width of 172 bits exists, the LVDS signal (56 bits) of the control data can be transferred to the baseband processing unit 110 without delaying the transfer of IQ data and the difference value.</p><p num="0061"> When the interface unit 150b acquires the IQ data of the antenna Ant1 and Ant2 from the MUX processing unit 200, the IQ data of the antenna Ant1 side and the antenna Ant2 side are displayed in chronological order in the same manner as the conventional wireless device. Transfer alternately.</p><p num="0062"> The DAC160 is a processing unit that converts a digital signal (IQ data) output from the interface unit 150a into an analog signal and outputs the converted analog signal to the antenna Ant1.</p><p num="0063"> The ADC 170 is a processing unit that converts an analog signal acquired from the antenna Ant1 into a digital signal (IQ data) and outputs the converted digital signal to the MUX processing unit 200 and the difference data generation unit 190. The ADC 180 is a processing unit that converts an analog signal acquired from the antenna Ant2 into a digital signal (IQ data) and outputs the converted digital signal to the difference data generation unit 190.</p><p num="0064"> The difference data generation unit 190 is a processing unit that calculates the difference value between the IQ data acquired from the ADC 170 and the IQ data acquired from the ADC 180 for each hour and outputs the calculated difference value to the interface unit 150b. When the data amount of the difference value is equal to or larger than the threshold value, the difference data generation unit 190 outputs the IQ data received by the antenna Ant2 to the MUX processing unit 200 instead of the difference value.</p><p num="0065"> When the MUX processing unit 200 acquires only the IQ data of the antenna Ant1 from the ADC 170, the MUX processing unit 200 outputs the IQ data of the antenna Ant1 to the interface unit 150b. Further, when the MUX processing unit 200 acquires the IQ data of the antenna Ant1 from the ADC 170 and acquires the IQ data of the antenna Ant2 from the difference data generation unit 190, the MUX processing unit 200 synthesizes each IQ data and outputs the IQ data to the interface unit 150b. ..</p><p num="0066"> Next, the configuration of the difference data generation unit 190 shown in FIG. 1 will be described. FIG. 3 is a diagram showing the configuration of the difference data generation unit 190. As shown in FIG. 3, the difference data generation unit 190 includes a difference calculation unit 191, a difference threshold comparison unit 192, a bit conversion unit 193, and a transmission selection processing unit 194.</p><p num="0067"> The difference calculation unit 191 calculates the difference value between the IQ data acquired from the ADC 170 and the IQ data acquired from the ADC 180 for each hour, and outputs the calculated difference value to the difference threshold comparison unit 192 and the bit conversion unit 193. Is.</p><p num="0068"> The difference threshold comparison unit 192 is a processing unit that compares the amount of difference value data with the threshold value and determines whether or not the amount of difference value data is equal to or greater than the threshold value. Here, the threshold value is, for example, 128 bits. The difference threshold comparison unit 192 outputs the comparison result to the transmission selection processing unit 194.</p><p num="0069"> The bit conversion unit 193 is a processing unit that converts the acquired difference value into bits when the difference value is acquired from the difference calculation unit 191. The bit conversion unit 193 outputs the difference value converted into bits to the transmission selection processing unit 194.</p><p num="0070"> The transmission selection processing unit 194 is a processing unit that outputs the difference value or the IQ data of the antenna Ant2 to the interface unit 150b based on the comparison result of the difference threshold value comparison unit 192. Specifically, the transmission selection processing unit 194 outputs the IQ data of the antenna Ant2 to the interface unit 150b when the data amount of the difference value is equal to or larger than the threshold value. On the other hand, when the data amount of the difference value is less than the threshold value, the transmission selection processing unit 194 outputs the difference value to the interface unit 150b.</p><p num="0071"> Next, the configuration of the IQ data restoration unit 140 shown in FIG. 1 will be described. FIG. 4 is a diagram showing the configuration of the IQ data restoration unit 140. As shown in FIG. 4, the IQ data restoration unit 140 has a restoration processing unit 141 and a selection processing unit 142.</p><p num="0072"> The restoration processing unit 141 is a processing unit that restores the IQ data of the antenna Ant2 based on the IQ data of the antenna Ant1 and the difference value. For example, the restoration processing unit 141 adds the IQ data (IQ data arranged in chronological order) of the antenna Ant1 and the difference value (difference value arranged in chronological order) for each time, thereby adding the IQ data of the antenna Ant2. Restore IQ data. The restoration processing unit 141 outputs the IQ data of the restored antenna Ant2 to the selection processing unit 142.</p><p num="0073"> The selection processing unit 142 selects the IQ data of the antenna Ant2 output from the restoration processing unit 141 or the IQ data of the antenna Ant2 output from the DeMUX processing unit 130, and uses the selected IQ data as the IQ data of the antenna Ant2. Is a processing unit that outputs data to an external device.</p><p num="0074"> When the selection processing unit 142 acquires the IQ data of the antenna Ant2 from the DeMUX processing unit 130, the selection processing unit 142 outputs the IQ data to an external device. On the other hand, when the selection processing unit 142 cannot acquire the IQ data of the antenna Ant2 from the DeMUX processing unit 130, the selection processing unit 142 acquires the IQ data of the antenna Ant2 from the restoration processing unit 141 and outputs the IQ data to an external device.</p><p num="0075"> Next, the processing procedure of the RF-IC unit 150 according to this embodiment will be described. FIG. 5 is a flowchart showing a processing procedure of the RF-IC unit 150 according to this embodiment. As shown in FIG. 5, the RF-IC unit 150 acquires the IQ data of the antennas Ant1 and Ant2 (step S101), and calculates the difference value of each IQ data (step S102).</p><p num="0076"> The RF-IC unit 150 determines whether or not the amount of difference value data is equal to or greater than the threshold value (step S103). When the amount of difference value data is less than the threshold value (step S104, No), the RF-IC unit 150 outputs the IQ data of the antenna Ant1 and the difference value to the baseband processing unit 110 (step S105). On the other hand, when the data amount of the difference value is equal to or larger than the threshold value (step S104, Yes), the RF-IC unit 150 outputs the IQ data of the antennas Ant1 and Ant2 to the baseband processing unit 110 (step S106).</p><p num="0077"> Next, the processing procedure of the IQ data restoration unit 140 according to this embodiment will be described. FIG. 6 is a flowchart showing a processing procedure of the IQ data restoration unit 140 according to this embodiment. As shown in FIG. 6, the IQ data restoration unit 140 determines whether or not the difference value has been acquired (step S201).</p><p num="0078"> If the IQ data recovery unit 140 has acquired the difference value (step S202, Yes), the IQ data recovery unit 140 restores the IQ data of the antenna Ant2 based on the difference value and the IQ data of the antenna Ant2 (step S203), and the antenna. Output the IQ data of Ant2 (step S204).</p><p num="0079"> On the other hand, if the IQ data restoration unit 140 has not acquired the difference value (step S202, No), it acquires the IQ data of the antenna Ant2 from the DeMUX processing unit 130 (step S205), and proceeds to step S204.</p><p num="0080"> As described above, in the wireless device 100 according to the present embodiment, the RF-IC unit 150 calculates the difference value between the IQ data received by the antenna Ant1 and the IQ data received by the antenna Ant2, and receives the IQ data by the antenna Ant2. Instead of the IQ data, the difference value is transferred to the baseband processing unit 110. Then, in the wireless device 100, the baseband processing unit 110 restores the IQ data of the antenna Ant2 based on the difference value and the IQ data of the antenna Ant1.</p><p num="0081"> The amount of difference value data is smaller than the IQ data received by the antenna Ant2. Therefore, even if the wireless device 100 transfers IQ data and control data received from a plurality of antennas in one lane, the bit width of the control data can be secured, so that the occurrence of data delay can be prevented.</p><p num="0082"> By the way, among the processes described in this embodiment, all or part of the processes described as being automatically performed may be manually performed, or the processes described as being manually performed may be performed. All or part of it can be done automatically by a known method. In addition, the processing procedure, control procedure, specific name, and information including various data and parameters shown in the above document and drawings can be arbitrarily changed unless otherwise specified.</p><p num="0083"> The following additional notes will be further disclosed with respect to the embodiments including each of the above embodiments.</p><p num="0084">(Appendix 1) The data received by the first antenna and the data received by the second antenna are acquired, respectively, and the difference value between the data received by the first antenna and the data received by the second antenna is calculated. Difference calculation unit and A transfer unit that transfers the data received by the first antenna and the difference value to the reception unit. A wireless device characterized by having.</p><p num="0085">(Supplementary Note 2) The description in Appendix 1, wherein the transfer unit converts the data and the difference value received by the first antenna into a signal, and transfers each converted signal to the receiving unit to each other. Wireless device.</p><p num="0086">(Appendix 3) The transfer unit compares the data amount of the difference value with the threshold value, and when the data amount of the difference value is less than the threshold value, the transfer unit receives the data received by the first antenna and the difference value. The wireless device according to Appendix 1 or 2, characterized in that the data is transferred to.</p><p num="0087">(Appendix 4) The transfer unit compares the data amount of the difference value with the threshold value, and when the data amount of the difference value is equal to or more than the threshold value, the data received by the second antenna is used instead of the difference value. The wireless device according to Appendix 1, 2 or 3, wherein the data is transmitted to the receiving unit.</p><p num="0088">(Appendix 5) When the data received by the first antenna and the difference value are received from the transfer unit, the data received by the second antenna is restored based on the data and the difference value. The wireless device according to any one of Supplementary note 1 to 4, further comprising a restoration unit.</p><p num="0089">(Appendix 6) The wireless device A calculation step of acquiring the data received by the first antenna and the data received by the second antenna, respectively, and calculating the difference value between the data received by the first antenna and the data received by the second antenna. , A transfer step of transferring the data received by the first antenna and the difference value to the receiving unit. A transfer method characterized by including.</p><p num="0090">(Supplementary Note 7) The transfer step is described in Appendix 6, wherein the data received by the first antenna and the difference value are converted into signals, and the converted signals are transferred to the receiving unit to each other. Transfer method.</p><p num="0091">(Appendix 8) The transfer step compares the data amount of the difference value with the threshold value, and when the data amount of the difference value is less than the threshold value, the data received by the first antenna and the difference value are received by the receiving unit. The transfer method according to Appendix 6 or 7, characterized in that the data is transferred to.</p><p num="0092">(Appendix 9) The transfer step compares the data amount of the difference value with the threshold value, and when the data amount of the difference value is equal to or larger than the threshold value, the data received by the second antenna is used instead of the difference value. The transfer method according to Appendix 6, 7 or 8, wherein the data is transmitted to the receiving unit.</p><p num="0093">(Appendix 10) When the data received by the first antenna and the difference value are received, a restoration step of restoring the data received by the second antenna based on the data and the difference value is further performed. The transfer method according to any one of Supplementary notes 6 to 9, wherein the transfer method is included.</p>

1,2,100 wireless device 10,110 Baseband processing unit 11,41,200 Mux processing unit 12 P / S conversion processing unit 13 SyncMux processing unit 14 LVDS driver 15 LVDS receiver 16 Sampling processing unit 17 SyncDetect processing unit 18 S / P conversion processing unit 19 Detect processing unit 10a, 10b, 20a, 20b, 30a, 30b, 40a, 40b, 120a, 120b, 150a, 150b Interface section 20,40 RF-IC section 21,42,160 DAC 22,43,44,170,180 ADC 31,130 DeMUX processing unit 140 IQ data recovery unit 141 Restoration processing unit 142 Selection processing unit 190 Difference data generator 191 Difference calculation unit 192 Difference threshold comparison unit 193 Bit conversion section 194 Transmission selection processing unit