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On the effect of multiple access interference in a space time spreading time hopping PPM UWB system

Journal Article


Abstract


  • This study investigates the effect of multiple sources using STS across a Time-Hopping-PPM

    Modulation that is over an UWB Saleh-Valenzuela channel with each source using two

    transmit antennas. We model and analyze this system, showing that the presence of such

    MAI results in a significant degradation in BER performance. Simulation results show that

    for strong signal strength of interfering MAI signals degradation in BER performance is

    observed for the cases where we have five and 10 distinct MAI sources present when using

    Walsh-Hadamard thirty two chip spreading sequences. Using simulation, we investigate

    the use of other sets of orthogonal spreading sequences with improved cross correlation

    properties and find that for some sequences a significant improvement is seen compared

    to Walsh-Hadamard sequences when they are similarly misaligned. We show that MAI

    degrades the BER performance of such systems and that selection of improved cross correlation

    spreading code sequence sets improves BER.

Publication Date


  • 2012

Citation


  • P. Vial, B. J. Wysocki, T. Wysocki, M. Ros & D. A. Stirling, "On the effect of multiple access interference in a space time spreading time hopping PPM UWB system," Computers and Electrical Engineering, vol. 38, (4) pp. 994-1009, 2012.

Scopus Eid


  • 2-s2.0-84862209857

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/1925

Has Global Citation Frequency


Number Of Pages


  • 15

Start Page


  • 994

End Page


  • 1009

Volume


  • 38

Issue


  • 4

Place Of Publication


  • United Kingdom

Abstract


  • This study investigates the effect of multiple sources using STS across a Time-Hopping-PPM

    Modulation that is over an UWB Saleh-Valenzuela channel with each source using two

    transmit antennas. We model and analyze this system, showing that the presence of such

    MAI results in a significant degradation in BER performance. Simulation results show that

    for strong signal strength of interfering MAI signals degradation in BER performance is

    observed for the cases where we have five and 10 distinct MAI sources present when using

    Walsh-Hadamard thirty two chip spreading sequences. Using simulation, we investigate

    the use of other sets of orthogonal spreading sequences with improved cross correlation

    properties and find that for some sequences a significant improvement is seen compared

    to Walsh-Hadamard sequences when they are similarly misaligned. We show that MAI

    degrades the BER performance of such systems and that selection of improved cross correlation

    spreading code sequence sets improves BER.

Publication Date


  • 2012

Citation


  • P. Vial, B. J. Wysocki, T. Wysocki, M. Ros & D. A. Stirling, "On the effect of multiple access interference in a space time spreading time hopping PPM UWB system," Computers and Electrical Engineering, vol. 38, (4) pp. 994-1009, 2012.

Scopus Eid


  • 2-s2.0-84862209857

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/1925

Has Global Citation Frequency


Number Of Pages


  • 15

Start Page


  • 994

End Page


  • 1009

Volume


  • 38

Issue


  • 4

Place Of Publication


  • United Kingdom