Patent ID: 8315580

Claim:
A detection process of receiving a signal that was transmitted over a communication channel, the signal being in a sequence of a same symbol that is repeated during N sequential slots within one Transmission Time Interval (TTI), said symbol being extracted from a ternary alphabet, said detection process comprising: subtracting the symbol received at a certain time instant k from a following symbol received at the following time instant k+1 so as to eliminate symbol contribution and isolate a noise contribution; estimating a noise variance v by performing the subtracting step N−1 times corresponding to a period of N symbols in the received signal and thus isolating N−1 contributions, and estimating the noise variance by summing squares of the N−1 contributions; summing all consecutive received signals of the same TTI so as to isolate a transmitted signal contribution, plus some residual noise so as to generate a signal sum; squaring the signal sum so as to obtain a chi squared distribution; determining a threshold proportional to the variance; and comparing said threshold to a value comprising the chi squared distribution and a sign of the signal sum to determine which element of the ternary alphabet was originally transmitted over the communication channel.