LLR calculation for iterative decoding on fading channels using Padé approximation

Gou Hosoya, Mikio Hasegawa, Hiroyuki Yashima

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

In this paper, approximate calculation of channel log likelihood ratio (LLR) for wireless channels using Padé approximation is devised. Due to the lack of knowledge of the channel state information of a wireless fading channel, such as uncorrelated flat Rayleigh fading channels, calculation of exact LLR for these channels is quite complicated for a practical implementation. The previous work, LLR calculation using the Taylor approximation, quickly becomes inaccurate as the channel output leaves some derivative point. To overcome this problem, we devise a new LLR approximation using Padé approximation, which expresses the original function by rational form of two polynomials with the same total number of coefficients of the Taylor series, accelerates the Taylor approximation, is devised. By applying the proposed approximation to the iterative decoding and the low-density parity-check codes, we show the effectiveness of the proposed methods by simulation results and analysis based on the density evolution.

本文言語English
ホスト出版物のタイトル2012 International Conference on Wireless Communications and Signal Processing, WCSP 2012
DOI
出版ステータスPublished - 2012
外部発表はい
イベント2012 International Conference on Wireless Communications and Signal Processing, WCSP 2012 - Huangshan, China
継続期間: 2012 10 252012 10 27

出版物シリーズ

名前2012 International Conference on Wireless Communications and Signal Processing, WCSP 2012

Conference

Conference2012 International Conference on Wireless Communications and Signal Processing, WCSP 2012
国/地域China
CityHuangshan
Period12/10/2512/10/27

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • 信号処理

フィンガープリント

「LLR calculation for iterative decoding on fading channels using Padé approximation」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル