Design of low-density parity-check (LDPC) codes for high order constellations

Design of low-density parity-check (LDPC) codes for high order constellations
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DOI:
10.1109/glocom.2004.1378925
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发表时间:
2004-11
期刊:
IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.
影响因子:
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通讯作者:
H. Sankar;N. Sindhushayana;K. Narayanan
H. Sankar;N. Sindhushayana;K. Narayanan
中科院分区:
其他
文献类型:
--
作者:
H. Sankar;N. Sindhushayana;K. Narayanan

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在本文中,我们提出了一个简单的LDPC码的设计,它结合了良好的性能,多级编码(MLC)和比特交织编码调制(BICM)计划与灰度映射PAM星座和一次性解调。通过仿真,我们表明,它比MLC/并行独立解码的短中长度,这是大多数应用程序所需的,在AWGN和块衰落信道。由于2/sup m/-PAM表示2/sup 2 m/-QAM的一个正交分量,因此优化也适用于QAM。一般来说,这个想法可以很容易地扩展到其他调制方案,如2/sup m/-PSK。
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.