Spatial precoder design for differential space-time coded systems: Based on fixed parameters of mimo channels

Tharaka A. Lamahewa, Van K. Nguyen, Thushara D. Abhayapala, Rodne A. Kennedy

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    In this paper, we introduce the novel idea of linear spatial precoding based on fixed and known parameters of MIMO channels to improve the performance of differential space-time coding schemes. Antenna spacing and antenna placements (geometry) are considered as fixed parameters of MIMO channels, which are known at the transmitter. This new linear spatial precoding scheme exploits the antenna placement information at both ends of the MIMO channel to ameliorate the effect of non-ideal antenna placement on the performance of differential space-time coded systems. With this design, the precoder is fixed for fixed antenna placement and the transmitter does not require any feedback of channel state information (partial or full) from the receiver. A second precoding scheme is proposed by exploiting the non-isotropic scattering distribution parameters of the scattering channel. Unlike in the first scheme, the second scheme requires the receiver to estimate the non-isotropic distribution parameters and feed them back to the transmitter. Simulation results show that first scheme provides significant performance improvements at low SNRs and the second scheme provides significant performance improvements both at low and high SNRs.

    Original languageEnglish
    Title of host publication2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, SPAWC
    DOIs
    Publication statusPublished - 2006
    Event2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, SPAWC - Cannes, France
    Duration: 2 Jul 20065 Jul 2006

    Publication series

    NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC

    Conference

    Conference2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, SPAWC
    Country/TerritoryFrance
    CityCannes
    Period2/07/065/07/06

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