Adaptive single-carrier transmission using QRM-ML block signal detection

Tetsuya Yamamoto, Fumiyuki Adachi

研究成果: Conference contribution

抄録

In this paper, we propose an adaptive single-carrier (SC) transmission suitable for near maximum likelihood (ML) block signal detection using QR decomposition and M-algorithm (QRM-MLBD). QRM-MLBD can significantly improve the bit error rate (BER) performance of SC block transmission. However, in order to achieve a close-to-ML performance, the use of a fairly large number M of surviving paths in the M-algorithm is required and hence its computational complexity is still high. In this paper, to reduce the required number of surviving paths, we introduce an unequal bit loading in an SC transmission block. In QRM-MLBD, the signal-to-noise power ratio (SNR) degrades for symbols to be detected at early stages in the M-algorithm. By noting this fact, we propose to load less number of bits (i.e., lower modulation level) on symbols close to the end of block. We show that the introduction of an unequal bit loading to SC block transmission using QRM-MLBD can achieve almost the same BER performance as the conventional QRM-MLBD while significantly reducing the required number M of surviving path in the M-algorithm.

本文言語English
ホスト出版物のタイトルICICS 2011 - 8th International Conference on Information, Communications and Signal Processing
DOI
出版ステータスPublished - 2011
外部発表はい
イベント8th International Conference on Information, Communications and Signal Processing, ICICS 2011 - Singapore, Singapore
継続期間: 2011 12月 132011 12月 16

出版物シリーズ

名前ICICS 2011 - 8th International Conference on Information, Communications and Signal Processing

Other

Other8th International Conference on Information, Communications and Signal Processing, ICICS 2011
国/地域Singapore
CitySingapore
Period11/12/1311/12/16

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • 情報システム
  • 信号処理

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