Selective decision directed channel estimation for OFDM communications over multipath Rician fading channels

Andreja Radosevic, Tolga M. Duman, John G. Proakis, Milica Stojanovic

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

3 Scopus citations

Abstract

In this work we explore the performance of a selective decision directed (DD) channel estimation (CE) method for orthogonal frequency division multiplexing (OFDM) based communications over multipath Rician fading channels, where fading is modeled as an auto-regressive (AR) random process. The method is based on soft-selection of data sub-carriers that are used in the DD mode. Particularly, in the process of soft-selection we weigh the data sub-carriers for reliable CE, and couple them with DD CE based on least-squares (LS) with thresholding. Our numerical results indicate performance improvements as compared to block-by-block pilot-assisted CE with a uniform pilot grid, and non-weighted DD CE. For uncoded and low density parity check (LDPC)-coded OFDM systems, we explore the trade-offs resulting from using a varying number of pilots and/or DD data sub-carriers, the effect of the receiver-end diversity, and the impact of channel properties (such as the Rician k-factor and the Doppler spread) in terms of the overall system throughput and bit error rate (BER).

Original languageEnglish (US)
Title of host publication2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012
Pages555-559
Number of pages5
DOIs
StatePublished - Nov 2 2012
Event2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012 - Cesme, Turkey
Duration: Jun 17 2012Jun 20 2012

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC

Other

Other2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012
CountryTurkey
CityCesme
Period6/17/126/20/12

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Information Systems

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  • Cite this

    Radosevic, A., Duman, T. M., Proakis, J. G., & Stojanovic, M. (2012). Selective decision directed channel estimation for OFDM communications over multipath Rician fading channels. In 2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012 (pp. 555-559). [6292970] (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC). https://doi.org/10.1109/SPAWC.2012.6292970