Process for detecting transmitted symbols based on a ternary alphabet and corresponding receiver

摘要

Method for detecting a communication signal based on a ternary alphabet, said signal transporting the same transmitted symbol for N sequential slots within one Time Transmission Interval, involving the steps of:- subtracting (21) the received signal (i) from signal (i+1) so as to eliminate signal contribution and isolate the noise contribution;- estimating (22) the noise variance v;- summing (23) all consecutive received signals of the same TTI so as to isolate the transmitted signal contribution, plus some residual noise;- squaring (24) the variable so as to obtain a chi squared distribution, central if the transmitted signal was 0, non-central if it was +1 or -1.- determining (25) a threshold proportional to said variance;- using (26) said threshold so as to perform detection of the communication channel.