Patent ID: 9130815
Filing Date: 2015-09-08
Classification: H04L

Abstract:
1. A method of compensating phase error of a received signal, the method comprising receiving a signal representing a symbol set comprising a plurality of symbols of a first type having an N-Quadrature Amplitude Modulation (N-QAM) signal configuration, where N is an integer larger than 4, and at least one symbol of a second type having an Amplitude and Phase-Shift Keying (A-PSK) signal configuration, wherein both the symbols of the first type and of the second type carry data and wherein the symbols of the second type also are arranged as pilot symbols for determination of phase rotation; providing the signal to a phase calculator; determining symbol phase value and phase error from symbols of the second type by the phase calculator; providing determined phase by the phase calculator; performing a phase correction according to the determined phase and providing the corrected signal to a symbol demodulator; and determining data carried by the symbols by demodulating the corrected signal by the symbol demodulator.