Design of low-density parity-check (LDPC) codes for high order constellations
Design of low-density parity-check (LDPC) codes for high order constellations
复制标题
DOI:
10.1109/glocom.2004.1378925
复制
发表时间:
2004-11
期刊:
影响因子:
--
通讯作者:
H. Sankar;N. Sindhushayana;K. Narayanan
中科院分区:
文献类型:
--
作者:
H. Sankar;N. Sindhushayana;K. Narayanan
In this paper, we propose a simple design of LDPC codes which combines the good properties of multilevel coding (MLC) and bit-interleaved coded modulation (BICM) schemes with Gray-mapped PAM constellations and one-shot demodulation. Through simulations, we show that it performs better than MLC/parallel independent decoding for short-medium lengths, which is required for most applications, on AWGN and block-fading channels. Since 2/sup m/-PAM represents one quadrature component of 2/sup 2m/-QAM, the optimization holds true for QAM too. In general, this idea can be extended to other modulation schemes like 2/sup m/-PSK very easily.