Patent ID: 9065718
Filing Date: 2015-06-23
Classification: H03M,H04L

Abstract:
1. A method for implementing a COFDM communication system to improve performance and reduce effects of amplifier nonlinearity, said method comprising: converting a serial input data stream to multiple slower parallel output data streams; applying FEC coding to each said parallel output data streams using a parallel bank of pseudo orthogonal QPSK M-QAM FEC modulators to create parallel streams of M-QAM FEC symbols from each said parallel output data streams; creating modulated OFDM subcarriers for each said parallel streams of M-QAM FEC symbols and converting sum of said modulated OFDM subcarriers to a COFDM signal; transmitting said COFDM signal through a communication channel; receiving said COFDM signal from said communication channel; converting said COFDM signal to said parallel streams of M-QAM FEC symbols; demodulating each said parallel streams of M-QAM FEC symbols using a parallel bank of pseudo orthogonal QPSK M-QAM FEC demodulators to create said parallel output data streams from each said parallel streams of M-QAM FEC symbols; and parallel to serial converting said parallel output data streams to a serial data stream.