Patent ID: 9509538
Filing Date: 2016-11-29
CPC Classification: H04B,H04L

Claim Text:
1. A digital communication receiver for detecting signals transmitted by a digital transmitter through a communication channel, the channel having a channel attenuation |h| and a channel phase shift having a multipath fading effect on the transmitted signals, the receiver comprising a demodulator configured to demodulate signals received by the receiver using channel coefficients representing the channel attenuation only without any knowledge of the channel phase shift, wherein: the demodulator is robust to phase noise, large phase variations and time-varying I-Q imbalance; the demodulator uses a M-ary amplitude shift keying technique, the transmitted signals being modulated by the transmitter using said same technique before transmission using a modulation order M equal or superior to 2; the detected signals have a symbol Error Rate (SER) intermediate in terms of performance between a coherent detection and a non-coherent detection assuming a same spectral efficiency; the demodulator is less complex than a coherent demodulator, and wherein the SER performance of the detected signals using the demodulator is substantially similar to a SER performance obtained using a coherent demodulator; the channel is a multi-path fading channel; and the received signals have an energy η and the channel attenuation coefficients have a magnitude |h| where ζ is: the energy equalized signal where ν is: the received signal where A where w is: additive white Gaussian noise where (.)* denotes the complex conjugate.