US Patent 7286614 Pilotless, wireless, telecommunications apparatus, systems and methods

Systems, methods and apparatus are provided for demapping a received wireless signal. The wireless signal includes signal-bearing data without accompanying pilot signals, and demapping is accomplished by extracting information from the signal-bearing data by reducing and averaging differential quadrature components or quadrature components of the received signal. Two embodiments are provided for the demapping procedure within a phase tracking loop. A first embodiment corrects the received signal, while a second embodiment corrects the constellation points