On the effects of spreading sequence pairs over MIMO-STS systems

Tianle Liu, Ahmed Alshabo, David Stirling, Le Chung Tran, Montserrat Ros, Prashan Premaratne, Peter James Vial, Beata Wysocki, Tad Wysocki

Research output: Contribution to journalArticlepeer-review


Previous studies have found that the Multiple Access Interference (MAI) effect is strongly associated with which sequence pairs are spread over Multiple-Input Multiple-Output Space–Time Spreading (MIMO-STS) systems. An improved method of determining which sequence pairs are to be spread is proposed. The choice of these pairs from the selected spreading code families results in a number of ways to mitigate the MAI effects. A Software Defined Radio (SDR) test bed system has been developed to evaluate the selected spreading sequences, in an attempt to mitigate the MAI effects over 2 1 MIMO-STS systems. The SDR test bed results reveal that, for a number of the spreading sequence families, improved transmission properties for asynchronous transmission can be achieved.

Original languageEnglish (US)
Pages (from-to)24-97
Number of pages74
JournalInternational Journal of Radio Frequency Identification Technology and Applications
Issue number1
StatePublished - 2018


  • MAI
  • MIMO
  • Pairs
  • SDR test bed.
  • Spreading sequences

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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