Patent ID: 6996080

Claim:
In a spread spectrum, chip synchronous CDMA communication system, a method of improving quality of services (QoS), increasing range of coverage and increasing traffic capacity wherein the spread spectrum, chip-synchronous CDMA communication system includes a multiplicity of user channels, each user channel including digital quadrature (I, Q) channels and a common multiplexer for the I, Q channels, the method comprising: receiving from an external source, a set of chip-synchronous CDMA signals to be transmitted; separately multiplexing the I channels and the Q channels into two separate constant-envelope baseband signals; selecting, on a chip-by-chip basis, the polarity of the I and Q chips including the multiplexer output baseband signal; baseband filtering both constant-envelope baseband signals to produce baseband-filtered signals; upconverting both baseband filtered signals to radio frequency (RF); combining both upconverted signals in quadrature at RF; and broadcasting the upconverted baseband filtered signals at RF.