Transmission space diversity controlling system

[Detailed Description of the Invention]

The present invention is * thing about the transmitting space Diver city control method used for a digital radio transmission system. Generally, it is digital [ like 14 QAM (quaaratar@amplituas moa-ulation) transmission method / quality and high-density ]! As the control circuit for Itaro ■ Wearing, a Time-Division-Multiplexing digital method or PM (fr@qu@ncymodtzlatlom) Inside nu l K (fr@qtc@ney 5hift keyimg) etc. -- control 1 lines, such as an analog platform modulation method or both combined use method, are known widely. It transmits by the gay Jital control [ who multiplexes a control signal by time sharing to the main digital signal by seeing one ] circuit which it is between the end offices which these transmission methods take woods to and large scale takes a high speed, and the art of transmitting the surveillance and control signal between each office with small capacity and sufficient At low speed by an analog compound abnormal-conditions control circuit is known. if it is wax in space diversity and a A (henceforth "8D") method, and a * receiving sn method cannot be prepared and a transmitting 8D method will not be taken under the limited conditions of location on the other hand -- If so -- there are things. There is transmission * A lot necessity to the transmitting end office of the other party, and it cannot process the phase control signal acquired in a zetaO Sending 118D method in a receiving end office by the above control circuits. The present invention improves this and an object of the present invention when the control signal of a transmitting 8D method cannot be transmitted using the conventional digital control circuit between an end and an office or the analog compound abnormal-conditions circuit between an end and an office is to provide simple K and the method economically transmitted to a transmitting end office from reception and an end office for this control signal. The present invention supplies electricity to the main signal transmission frame of a digital radio transmission system in the small empty bit beforehand, carries out Time Division Multiplexing of the transmitting Diver city control signal to this empty bit, and transmits it to it. A drawing explains this in more detail. The 1st vA is lineblock diagram ' of the control circuit of transmitting Japanese Method which used conventional example oym*e abnormal conditions. First, if an upstream is explained, the output signal of abnormal-conditions machine l will be carried out in dichotomy circuit 2 for 2 minutes, and one side will be sent out from transmitting antenna 5 via transmitter 4. After phase control of another side is carried out by infinite Transfer phase @6, it is sent out from transmitting antenna 9 via transmitter 7. these 8D control signals are receiving antennas IOK -- after being received and being amplified to a predetermined level with receiver nu, it is carried out by dichotomy circuit 13 for 2 minutes, and one side is outputted as an upper 9 circuit recovery signal by demodulator 15. Another side serves as an input of phase contrast or amplitude distorted detector circuit 16. This detector circuit 16 detects the phase contrast and Amplitude distortion of BD control signal, and is above-mentioned infinite Transfer phase 1 by B111 control circuit 18! The 60 control directions are judged and this control signal is sent out from 8I control circuit 18. Next, it gets down and, as for a circuit, the output signal of abnormal-conditions machine 21 is similarly sent out from transmitting antenna Jun via transmitter n. as for 8D Confidence, this output signal is carried out by two receiving antennas 25 and 27, it is amplified to a Prescribed level, is boiled as if, is compounded by synthetic circuit 31, gets down from a demodulator part to receiving 1-/fII28 and 30, and is outputted to them as a circuit recovery signal, respectively. This demodulator part transmits 8D control signal acquired in the upstream receiving part by the means expressed below to infinite phase converter 6. That is, each 8D control signal of an uphill side-by-side installation circuit is first packed with communication control unit W, It gets down, FM abnormal conditions of the frequency from a transmitting station of transmission 11I22 of a circuit are carried out, and the IFM recovery of this is carried out in the career synchronous circuit of the demodulator part of lower Sandwiching, and each average v and a circuit carry out an 8'D control control color with communication control unit 34, and it dissociates and takes out, and controls infinite phase converter 60 phase. Although economical efficiency is excellent in the method with this conventional simple compound modulation method, Degradation of the main digital signal by compound abnormal conditions cannot be disregarded, but in order to suppress degradation of this signal below to an acceptable value, data-transmission capacity is restricted, it comes out to obtain sufficient speed of response required to conquer multipass fading -- ! -- it was dangerous, and in order to solve this, providing the control circuit which did not perform compound abnormal conditions but became independent had a difficulty in economical efficiency. Although speed change of the data signal delivered from Carrying end is carried out, a frame pulse, a stack pulse, a /Criti check pulse, a digital control signal / To Luce, etc. are inserted and transmitted at equal intervals between data rows and various control is generally performed in * radio section, Place OK which creates frame composition zetaO non-railroad section Seki digital [ No. 1 ] may arrange an empty bit intentionally uninfluential in inside, or apparatus composition and a price, when a [O sky bit arises like 1-. The present invention is 1 by transmission with the O dishes of empty bit Sending SD system-signal vigor Naroda control line of this 1- extent that arises in the frame composition of the digital signal between non-railroad sections! It tries to use for Turtle control signal O transmission. The 2511st is a lineblock diagram of a present invention example control circuit. 2nd [ The ] figure KTh is and each numerals correspond to each numerals of Drawing 1, respectively. The Time-Division-Multiplexing read-out circuit language which the characteristic composition of this example writes 8D control signal sent out from the above-mentioned communication control unit 19 in a main signal transmission frame O predetermined empty bit, and carries out Time Division Multiplexing is connected to the input of abnormal-conditions @21, K And read this BD control signal by which Time Division Multiplexing was carried out, and be as if Time-Division-Multiplexing read-out Circuit correction which sends out this 8D control signal to the above-mentioned communication control unit 34 is connected to the output of a demodulator part. Time Division Multiplexing of each 8D control signal of a side-by-side installation circuit packed with predetermined empty A beat K communication control unit 19 of the shrine Time-Division-Multiplexing write-in circuit 35KX input data sequence is written in and carried out by a transmission section with such composition. Time-Division-Multiplexing read-out circuit J of a receiving part reads predetermined 8D control signal empty A beat K Written in, separates and takes out the control signal of each side-by-side installation circuit by 1 Line control device, and controls infinite phase converter 6. As stated above, according to the 1 present invention, there is an outstanding effect which can constitute a high-speed transmitting 8D control circuit from inside capacity only by adding the easy Time-Division-Multiplexing write-in circuit for required apparatus and a read-out circuit on the Gang composition of a high document degree digital method. It is also possible to apply not only to Sendingt and an 8 D system-circuit but to a control circuit additional in an original circuit.

[Brief Description of the Drawings]

Drawing 1 is a lineblock diagram of a conventional example control circuit. The lineblock diagram of 2nd [ The ] figure Shamoto invention example control circuit. 1.21- and an abnormal-conditions machine, 2.13 ... A dichotomy circuit, 4.7, n ... Mr. transmission, 6- and an infinite phase converter, 5.9, sake ... A transmitting antenna, 1G, 25.27 ... Receiving antenna 12.2B and ... (Capital) -- Receiver %15 and feather ... a demodulator, 16, - and a detector circuit, and 1g .. a -8I control circuit, 19, and A lyric ... a communication control unit and 31 -.. a synthetic circuit, Assault - and a Time-Division-Multiplexing write-in circuit, and Correction 1 Time-Division-Multiplexing 1 figure figure 2