BER analysis for MIMO BICM-ID assuming finite precision of extrinsic LLR

Chien Yi Wang*, I. Wei Lai, Tzi Dar Chiueh, Gerd Ascheid, Heinrich Meyr

*此作品的通信作者

研究成果: 書貢獻/報告類型會議論文篇章

摘要

In this paper, we analyze the error rate degradation caused by the finite-precision extrinsic log-likelihood ratio (LLR), i.e., demapper output, for multiple-input multiple-output (MIMO) bit-interleaved coded modulation with iterative decoding (BICM-ID). A closed-form expression for the probability density function (pdf) of the metric difference with finite precision is derived. This pdf is well-approximated by two approaches, namely the pseudo quantization noise (PQN) model and the pdf tail truncation. Moreover, we interpret such performance degradation as an additional signal-to-noise ratio (SNR) loss. As validated by Monte Carlo simulations, this SNR loss can be directly applied at the first iteration, extending our analysis to non-iterative scenario. This work provides a convenient indicator for deciding the LLR precision in real implementations.

原文英語
主出版物標題ISITA/ISSSTA 2010 - 2010 International Symposium on Information Theory and Its Applications
頁面129-134
頁數6
DOIs
出版狀態已發佈 - 2010 十二月 1
事件2010 20th International Symposium on Information Theory and Its Applications, ISITA 2010 and the 2010 20th International Symposium on Spread Spectrum Techniques and Applications, ISSSTA 2010 - Taichung, 臺灣
持續時間: 2010 十月 172010 十月 20

出版系列

名字ISITA/ISSSTA 2010 - 2010 International Symposium on Information Theory and Its Applications

會議

會議2010 20th International Symposium on Information Theory and Its Applications, ISITA 2010 and the 2010 20th International Symposium on Spread Spectrum Techniques and Applications, ISSSTA 2010
國家/地區臺灣
城市Taichung
期間2010/10/172010/10/20

ASJC Scopus subject areas

  • 計算機理論與數學
  • 資訊系統

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