完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | Chang, Chia-Wei | en_US |
dc.contributor.author | Chen, Po-Ning | en_US |
dc.contributor.author | Han, Yunghsiang S. | en_US |
dc.date.accessioned | 2014-12-08T15:15:40Z | - |
dc.date.available | 2014-12-08T15:15:40Z | - |
dc.date.issued | 2006-10-01 | en_US |
dc.identifier.issn | 1536-1276 | en_US |
dc.identifier.uri | http://dx.doi.org/10.1109/TWC.2006.04322 | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/11704 | - |
dc.description.abstract | In this paper, we present a systematic recursive formula for bit-wise decomposition of M-ary symbol metric. The decomposed bit metrics can be applied to improve the performance of a system where the information sequence is binary-coded and interleaved before M-ary modulated. A traditional receiver designed for certain system is to de-map the received M-ary symbol, into its binary isomorphism so as to facilitate the subsequent bit-based manipulation, such as hard-decision decoding. With a bit-wise decomposition of M-ary symbol metric, a soft-decision decoder can be used to achieve a better system performance. The idea behind the systematic formula is to decompose the symbol-based maximum-likelihood (ML) metric by equating a number of specific equations that are drawn from squared-error criterion. It interestingly yields a systematic recursive formula that can be applied to some previous work derived from different standpoint. Simulation results based on IEEE 802.11a/g standard show that at bit-error-rate of 10(-5), the proposed bit-wise decomposed metric can provide 3.0 dB, 3.9 dB and 5.1 dB improvement over the concatenation of binary-demapper, deinterleaver and hard-decision decoder respectively for 16QAM, 64QAM and 256QAM symbols, in which the in-phase and quadrature components in a complex M-2-QAM symbol are independently treated as two real M-PAM symbols. Further empirical study on system imperfection implies that the proposed bit-wise decomposed metric also improves the system robustness against gain mismatch and phase imperfection. In the end, a realization structure that avails the recursive nature of the proposed bit-decomposed metric formula is addressed. | en_US |
dc.language.iso | en_US | en_US |
dc.subject | maximum-likelihood decoding | en_US |
dc.subject | QAM modulation | en_US |
dc.subject | soft-decision decoding | en_US |
dc.subject | Viterbi decoder | en_US |
dc.title | A systematic bit-wise decomposition of M-ary symbol metric | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1109/TWC.2006.04322 | en_US |
dc.identifier.journal | IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | en_US |
dc.citation.volume | 5 | en_US |
dc.citation.issue | 10 | en_US |
dc.citation.spage | 2742 | en_US |
dc.citation.epage | 2751 | en_US |
dc.contributor.department | 電信工程研究所 | zh_TW |
dc.contributor.department | Institute of Communications Engineering | en_US |
dc.identifier.wosnumber | WOS:000241478400018 | - |
dc.citation.woscount | 1 | - |
顯示於類別: | 期刊論文 |