Method and apparatus for delivery of a radio signal in a communication system with code multiplex - division multiple access

摘要

In accordance with the CDMA technique, in forming a digital signal in basic band by summing relative contributions to several channels and convolution by a forming pulse. The inventive method consists modulating a carrier frequency with the digital signal in basic band with limited amplitude, in accordance with a linear radio modulation, and amplifying the radio signal derived from the modulation before transmitting it. In order to avoid saturation of the power amplifier (11), the digital signal amplitude in basic band is limited. This is achieved by subtracting from the digital signal in basic band a correction signal spectrally formed with said forming impulsion.