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On the effects of spreading sequence pairs over MIMO-STS systems
by Tianle Liu; Ahmed Alshabo; David Stirling; Le Chung Tran; Montserrat Ros; Prashan Premaratne; Peter James Vial; Beata Wysocki; Tad Wysocki
International Journal of Radio Frequency Identification Technology and Applications (IJRFITA), Vol. 5, No. 1, 2018

 

Abstract: 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.

Online publication date: Tue, 17-Apr-2018

 

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