An iterative multiuser detection for LDPC coded FFH/MFSK systems

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publication2007 16th IST Mobile and Wireless Communications Summit
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 16th IST Mobile and Wireless Communications Summit - Budapest, Hungary
Duration: 2007 Jul 12007 Jul 5

Publication series

Name2007 16th IST Mobile and Wireless Communications Summit

Other

Other2007 16th IST Mobile and Wireless Communications Summit
CountryHungary
CityBudapest
Period07-07-0107-07-05

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Communication

Fingerprint Dive into the research topics of 'An iterative multiuser detection for LDPC coded FFH/MFSK systems'. Together they form a unique fingerprint.

  • Cite this

    Su, S-L., Tsai, H. C., & Shen, Y. S. (2007). An iterative multiuser detection for LDPC coded FFH/MFSK systems. In 2007 16th IST Mobile and Wireless Communications Summit [4299164] (2007 16th IST Mobile and Wireless Communications Summit). https://doi.org/10.1109/ISTMWC.2007.4299164