Patent ID: 9559873
Date: 2017-01-31
CPC Classifications: H04L

Claim:
1. A signal receiving apparatus based on FTN, the apparatus comprising: an equalizer calculating, when a signal sampled by Fast to Nyquist (FTN) is received on a communication channel, a posterior probability of information bits and calculating a log likelihood ratio (LLR) by using the calculated posterior probability through a Bahl Cocke Jelineck Raviv (BCJR) algorithm; a deinterleaver deinterleaving bit data output from the equalizer; a decoder correcting of signal interference of the data bits deinterleaved by the deinterleaver by using the LLR and decoding the corrected signal interference; and an interleaver interleaving data output from the decoder to provide the interleaved data to the equalizer, wherein the equalizer calculates a branch metric according to state information transited to a next state from the estimated state information, and wherein the equalizer calculates a forward state metric and a backward state metric by using the branch metric and calculates the LLR by using probability components corresponding to the forward state metric, the backward state metric, and the branch metric.