Patent ID: 6240081
Filing Date: 2001-05-29
Classification: H04B,H04J

Abstract:
A code division multiple access communication system for processing a communication and transmitting said communication using an RF carrier, comprising:a plurality of individual code channels, each code channel including part of said communication, said each code channel including an I code channel and a Q code channel, said Q code channel phase shifted relative to said I code channel, said part being processed separately from other parts of said communication, at least one of said plurality of individual code channels is transmitted with a phase shift relative to another code channel,where said at least one code channel includes:a phase shifting circuit operating to phase shift said signal relative to said another code channel, said phase shifting circuit operating at a baseband frequency to produce a phase shifted signal, andan RF modulator, modulating the phase shifted signal according to the RF carrier to produce a signal at said RF carrier that is phase shifted relative to said another code channel;an I component summing element summing components from at least a plurality of said I channels;a Q component summing element summing components from at least a plurality of said Q channel;an I baseband filter, collectively baseband-filtering said plurality of I channel components; anda Q baseband filter, collectively baseband-filtering said plurality of Q channel components.