WIRELESS COMMUNICATIONS SYSTEM FOR TRANSMITTING AND RECEIVING DATA WITH INCREASED DATA RATES AND ROBUSTNESS

摘要

A data communications system (18) for conveying a series of input data symbols includes a transmitter subsystem (20) and a receiver subsystem (22). The transmitter subsystem (20) generates a series of composite waveforms corresponding to a series of input data symbols by selecting (32) from a set of mutually orthogonal component waveforms, then combines (36, 40) contemporaneous portions of at least two of the component waveforms so as to form a composite waveform which is unique to the data symbol. The transmitter subsystem (20) uses the composite waveform to modulate a carrier signal and transmits (44) the carrier signal over a communication channel (26). The receiver subsystem (22) receives the carrier signal and recovers the composite waveform from the carrier signal (46). The receiver subsystem identifies the data symbol by, at least in part, decompositioning (48) the composite waveforms into their constituent component waveforms so as to identify which composite waveforms have been transmitted.