Electronics and Telecommunications Research Institute

Ji Won Jung

Deock Gil Oh

In Ki Lee

Nae-Soo Kim

Min Hyuk Kim

Eun A Choi

Nam Soo Kim

Disclosed are a signal receiving apparatus based on FTN and a signal decoding method thereof, and the apparatus includes: 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 by using the calculated posterior probability; 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.

Signal receiving apparatus based on faster than nyquist and signal decoding method thereof

Disclosed are an apparatus and a encoding method using a turbo code and a unit and a method of permutation. The apparatus for encoding using a turbo code according to an exemplary embodiment of the present invention includes: a first encoder that encodes 3 bits inputted from first to third blocks each of which is formed of N bits respectively, with recursive systematic convolutional codes to output a first parity bit; a permutation unit that permutates the 3 bits; a second encoder that encodes the permutated 3 bits with the recursive systematic convolutional codes to output a second parity bit; and a puncturing unit that optionally removes the first parity bit and the second parity bit in consideration of a coding rate of a predetermined turbo code to control the coding rate.

Encoding apparatus and method using turbo code, and permutation unit and method

A pragmatic trellis code modulation decoder including a demodulator for receiving a modulated signal and computing coordination values of symbols of the modulated signal on an I-axis and Q-axis in a constellation; a coset mapper for generating 3-bit soft decision data based on the computed coordinate values; a viterbi decoder for receiving 3-bit soft decision data and generating 1-bit data as a coded data by decoding the 3-bit soft decision data; a re-encoder for receiving the 1-bit data from the viterbi decoder and obtaining un-coded information in order to compute an un-coded data; a sector phase quantizer for obtaining I channel and Q channel information based on the coordination values from the demodulator in order to obtain un-coded data; a time delayer for delaying output of the sector phase quantizer until the re-encoder outputs the un-coded information; and a non-coded code decoder for computing the un-coded data.

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Busan, South Korea

Ji Won Jung