A robust non-orthogonal space-time block code for four transmit antennas

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

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Publication details

Title of host publication57TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, VTC 2003-SPRING, VOLS 1-4, PROCEEDINGS
DatePublished - 2003
Pages301-305
Number of pages5
PublisherIEEE
Place of PublicationNEW YORK
Original languageEnglish
ISBN (Print)0-7803-7757-5

Abstract

Several non-orthogonal space-time block coding (NO-STBC) schemes have recently been proposed to achieve full rate transmission. Some of these schemes, however, suffer from weak robustness: their channel matrices will become ill-conditioned in the case of highly correlated channels (HCC). To address this issue, this paper derives a family of robust NO-STBC schemes for four Tx antennas based on the worst case of HCC. These codes turned out to be a superset of Jafarkhani's quasi orthogonal STBC codes. A computationally affordable linear decoder is also proposed. Although these codes achieve a similar performance to the non-robust schemes under normal channel conditions, they offer a strong robustness against HCC (although possibly yielding a poorer performance). Finally, computer simulations are presented to verify the algorithm design.

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