Faster Than Nyquist Transmission with Multiple Channel Codes

Abstract

The performance of turbo-like codes highly depends on their frame size and thus, the bit error rate performance of turbo-like codes can be improved by increasing the frame size. Unfortunately, increasing the frame size of channel codes induces some drawbacks such as the increase of not only encoding and decoding complexity but also transmission and decoding latencies. On the other hand, a faster than Nyquist (FTN) transmission causes intentional inter-symbol interference (ISI) and thus, induces some correlation among the transmission symbols. In this paper, we propose an FTN transmission with multiple channel codes. By exploiting the correlation among the modulated symbols, multiple code frames can be regarded as a code frame with a lager frame size. Due to the inherent parallel encoding scheme of proposed scheme, parallel decoding can be easily implemented. . 일반적인 통신 시스템에서는 심볼 간 간섭이 발생하지 않도록 나이퀴스트 (Nyquist) 율로 신호를

A Transmission Scheme Based on Uniform Shortening LDPC Codes for Performance Improvement in Faster-Than-Nyquist Systems

“…This problem is known to be solved by a technique called as channel coding. Thus, FTN system with channel coding is needed to ensure reliable transmission over noisy channels [7], [11]. The idea of applying FTN signaling with the powerful channel codes called low-density parity-check (LDPC) codes has been studied by many researchers [5], [12]- [15].…”

ISI Estimation Using Iterative MAP for Faster-Than-Nyquist Transmission

“…FDE (frequency-domain equalization), DFE (decision feedback equalization) 및 SIC (successive interference cancellation) 등 다양한 기법이 제안되었다 [4][5][6][7][8][9][10][11][12][13] .…”