Method and apparatus for rotating a phase of a modulated signal

(22) Starting day (24) Running day (41) Aim. avail.

<td> 20021311</td><td>(86) InL starting day and</td><td rowspan="2">2000.09.14, PCT / USOO / 25472</td>

<td> 2002.03.15</td><td>søknadsnununer</td>

<td> 2000.09.14</td><td>(85) Continuation Day</td><td> 2002.03.15</td>

<td> 2002.05.15</td><td>(30) Priority</td><td>1999.09.17, US 397429</td>

(71) Seeking (72) Enumerator (74) Plenipotentiary

Qualcomm Inc, 5775 Morehouse Drive, San Diego, CA 92121-1714, US Peter Black, San Diego, CA Michael A Howard, San Diego, CA, US Tandberg Patent Office AS, 0306 Oslo (54) Designated Phase Rotation of Modulated Signals ( 57) Summary

Technique for adjusting the phase rotation of a modulated signal to compensate for the phase rotation introduced by circuit elements in a transmitter signal path for a transmitter (100). The circuit elements may be directly connected to or operatively connected to this transmitter signal path. A phase rotation corresponding to a particular operating state determined by received control signals is first determined, and then the phase of the modulated signal is rotated to an angular value related to the particular phase rotation. The phase shift compensation can be performed at various locations in the transmitter signal path by rotating the phase of the digital data, quasi-noise sequences used for spectral scattering of these data, or carrier signals used to modulate them.

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