Performance of turbo decision-feedback detection for downlink OFDM

Koushik Sil*, Manish Agarwal, Dongning Guo, Michael L Honig, Wiroonsak Santipach

*Corresponding author for this work

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

5 Scopus citations

Abstract

This work studies the performance of multiuser detection and decoding in the downlink of cellular systems based on orthogonal frequency-division multiplexing (OFDM). Of particular interest is a worst case scenario where the desired user is at the cell boundary and subject to an equally strong interferer from a neighboring cell. A flexible iterative Turbo decisionfeedback equalizer (DFE) is proposed and studied numerically, which exhibits good error performance and resilience to fading, requires moderate training and low complexity, and accommodates multiple antennas easily. The scheme performs well without knowledge of the pilots of interfering signals from other cells, which is typically unavailable in practice, while such knowledge may improve the performance significantly. Furthermore, in the absence of knowledge of pilots for the out-of-cell interference, it is found that estimating the filter coefficients of the DFE directly is superior to deriving the coefficients from estimates of the instantaneous channel gains.

Original languageEnglish (US)
Title of host publication2007 IEEE Wireless Communications and Networking Conference, WCNC 2007
Pages1488-1492
Number of pages5
DOIs
StatePublished - Nov 27 2007
Event2007 IEEE Wireless Communications and Networking Conference, WCNC 2007 - Kowloon, China
Duration: Mar 11 2007Mar 15 2007

Other

Other2007 IEEE Wireless Communications and Networking Conference, WCNC 2007
CountryChina
CityKowloon
Period3/11/073/15/07

ASJC Scopus subject areas

  • Engineering(all)

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