Patent ID: 7672219

Claim:
A remote communication device for operation in a bidirectional communication system, the device comprising: at least one symbol mapper for mapping symbols using quadrature amplitude modulation (QAM) symbol mapping and phase-shift keying (PSK) symbol mapping; a Fast Fourier Transform (FFT) engine that receives a frame of parallel data based on symbol data generated by the symbol mapper, the Fast Fourier Transform (FFT) engine generating a frame of time domain in-phase and quadrature phase data from the symbol data generated by the symbol mapper; at least one converter generating an analog signal based on the stream of time domain in-phase and quadrature phase data; a radio frequency transmitter for transmitting a radio frequency signal based on the analog signal; and a processor, wherein the symbol mapper is responsive to the processor, and the processor controls synchronization of symbol timing and carrier frequency of transmissions from the radio frequency transmitter.