H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/69 (2006.01) H04B 1/707 (2006.01) H04B 1/76 (2006.01) H04J 11/00 (2006.01) H04J 13/00 (2006.01) H04Q 7/22 (2006.01)
Patent
CA 2245194
There are provided spread spectrum signal generating device and method in a transmitter of a mobile communications system using a plurality of logic channels. In the spread spectrum signal generating device, a multiplexer time multiplexes a pilot channel signal and a control channel signal which are output at constant power levels, a first orthogonal encoder orthogonally spreads the output of the multiplexer with an orthogonal code, a second orthogonal encoder orthogonally spreads voice channel data of a variable bit rate with an orthogonal code, a third orthogonal encoder orthogonally spreads packet channel data of a variable bit rate with an orthogonal code, an IQ signal mapper adds the outputs of the first and third orthogonal encoders, outputs the added signal as a first channel signal, and outputs the output of the second orthogonal encoder as a second channel signal, and a PN spreader spreads the first and second channel signals with PN codes and outputs a final spectrum spread signal. Therefore, a peak-to-average power ratio of the transmitter is maintained to be uniform.
Ahn Jae-Min
Chung Ha-Bong
Kang Hee-Won
Kim Je-Woo
Kim Young-Ky
R. William Wray & Associates
Samsung Electronics Co. Ltd.
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