Complexity-reduced iterative MAP receiver with partial sphere decoding in spatial multiplexing system

Hyung Ho Park, Tae Young Min, Dong S. Kwon, Chung Gu Kang

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

Abstract

In this paper, a partial sphere decoding approach is proposed to reduce the computational complexity of implementing the iterative MAP receiver for spatial multiplexing system, in which the complexity prohibitively increases with the number of transmit antennas and modulation order. The proposed approach considers only a subset of symbols with high a priori probabilities, i.e., more reliable ones, which allows for reducing the dimension of detection space. We design a novel reliability estimator which is used for dividing two subvectors according to reliability of individual symbol in the initial stage. Furthermore, a cost function-based partial MAP rule is applied to those subvectors so as to correct the initial estimation error in the course of iterative detection and decoding process. We have shown that the overall complexity of sphere decoding can be reduced by almost order of 2 in terms of floating point operations while maintaining the BER performance as close as 0.7dB to the conventional approach.

Original languageEnglish
Title of host publication2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
Pages2023-2027
Number of pages5
DOIs
Publication statusPublished - 2006
Event2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall - Montreal, QC, Canada
Duration: 2006 Sep 252006 Sep 28

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Other

Other2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
CountryCanada
CityMontreal, QC
Period06/9/2506/9/28

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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    Park, H. H., Min, T. Y., Kwon, D. S., & Kang, C. G. (2006). Complexity-reduced iterative MAP receiver with partial sphere decoding in spatial multiplexing system. In 2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall (pp. 2023-2027). [4109685] (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VTCF.2006.420