An iterative multiuser detection for LDPC coded FFH/MFSK systems

Szu-Lin Su, Her Chang Tsai, Ye Shun Shen

研究成果: Conference contribution

摘要

A turbo principle based iterative multiuser detection is proposed to reduce the BER in LDPC coded FFH/MFSK MA systems. First, a three-level hard-limiter on each chip with maximum-likelihood decision is made to avoid soft output ambiguity. Secondly, the reliable information from channel decoder is applied to aide multiuser interference reduction. When the soft reliability information of coded bit exceeds a predefined threshold, these code bits are defined as reliable bits. A symbol is reliable when all its bit vectors are reliable. As iteration proceeds, the number of reliable users is counted which will change the detection probability of the estimated symbol. Numerical results show that three-level hard-limited systems outperform two-level systems and the systems with modified soft outputs of multiuser detection have better performance than that of conventional iterative decoding systems.

原文English
主出版物標題2007 16th IST Mobile and Wireless Communications Summit
DOIs
出版狀態Published - 2007 十二月 1
事件2007 16th IST Mobile and Wireless Communications Summit - Budapest, Hungary
持續時間: 2007 七月 12007 七月 5

出版系列

名字2007 16th IST Mobile and Wireless Communications Summit

Other

Other2007 16th IST Mobile and Wireless Communications Summit
國家Hungary
城市Budapest
期間07-07-0107-07-05

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Communication

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