Patent ID: 6781980
Filing Date: 2004-08-24
Classification: H04B

Abstract:
A transmitter for communicating using code division multiple access (CDMA) comprising:a high-rate CDMA processor, adapted to 1) generate, by at least one one-to-N selector, N an integer greater than 1, a first set of lower rate data signals from a higher rate data signal associated with a higher data rate user, and 2) generate a first set of spread lower rate data signals using the first set of lower rate data signals; a low-rate processor adapted to generate a second set of spread lower rate data signals from at least one lower rate data signal associated with a lower data rate user; and a combiner section adapted to combine first selected ones of the first and second sets of spread lower rate data signals to form a first combined set, wherein the transmitter is adapted to transmit the first combined set as a low-power modulated carrier signal using a first frequency carrier signal, wherein the higher rate data signal has at least one assigned orthogonal code, wherein each one-to-N selector is adapted to divide the corresponding higher rate data signal into N lower rate data signals for the first set of lower rate data signals by periodically selecting values of the higher data rate user's higher rate data signal for each of the N lower rate data signals, and wherein the high-rate CDMA processor comprises at least two spreaders, each spreader combining one of N lower rate data signals with the assigned orthogonal code to form the corresponding one of the first set of spread lower rate data signals.