Bit Stream Decorrelation in An Iterative Overloaded MIMO Receiver for Higher-Order QAMs

Takuya Fujiwara, Satoshi Denno, Yafei Hou

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

Abstract

This paper proposes techniques to improve the transmission performance of an iterative receiver for higher order quadrature amplitude modulations (QAMs) in overloaded MIMO systems. One of the proposed techniques, called "modulo demapping"applies a modulo function to demapping that transforms modulation signals into the bit sequence. Although the proposed demapping causes the performance degradation at first, the proposed demapping achieves better BER performance as the number of the iterations increases. The other of the proposed technique, called "cyclic path switching"changes parameters in the iteration loop of the receiver periodically. The performance of the proposed techniques is verified by computer simulation in a 6×2 overloaded MIMO channel. When the 64QAM is applied, the proposed techniques attain a gain about 1.5 dB at the BER of 10-5.

Original languageEnglish
Title of host publicationWPMC 2020 - 23rd International Symposium on Wireless Personal Multimedia Communications
Subtitle of host publicationBridging Wireless and Business Worlds
PublisherIEEE Computer Society
ISBN (Electronic)9781728182964
DOIs
Publication statusPublished - Oct 19 2020
Event23rd International Symposium on Wireless Personal Multimedia Communications, WPMC 2020 - Virtual, Okayama, Japan
Duration: Oct 19 2020Oct 26 2020

Publication series

NameInternational Symposium on Wireless Personal Multimedia Communications, WPMC
Volume2020-October
ISSN (Print)1347-6890

Conference

Conference23rd International Symposium on Wireless Personal Multimedia Communications, WPMC 2020
Country/TerritoryJapan
CityVirtual, Okayama
Period10/19/2010/26/20

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Human-Computer Interaction

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