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In this paper, a class of quasi-orthogonal space-time block codes (Q-STBC) is proposed for systems with 2 antennas and 3 time slots, where the orthogonal Alamouti code can not be applied due to the “odd symbol” problem inherited in the 3GPP frame structure. The proposed codes can achieve rate one and full diversity with lower complexity maximum likelihood detection. The design takes into consideration...
Conventional approaches to high-rate space-time codes (STC) design focus on achieving maximum diversity and spatial multiplexing gains, hence they always have high decoding complexity. In this paper, we propose and construct a new class of STC, called block-orthogonal STC (BOSTC), which has a simplified ML (maximum likelihood) or near-ML decoding structure. We demonstrate the tradeoff between decoding...
In asynchronous wireless relay networks, the spacetime codes (STC) applied should be delay-tolerant. Although several delay-tolerant STC have been presented, they are limited by high decoding complexity, low rate and/or low diversity gain. To overcome these limitations, a new class of delay-tolerant STC, called shift group-decodable space-time block codes (STBC), with code rate 1 for arbitrary transmit...
In this paper, we formulate the algebraic structure of quasiorthogonal STBC with minimum decoding complexity (MDC-QOSTBC), whose maximum likelihood (ML) decoder only requires the joint detection of two real symbols, for any numbers of transmit antennas. We also propose a systematic method to construct an MDC-QOSTBC from an Orthogonal-STBC (O-STBC). The maximum code rate of the resultant MDC-QOSTBC...
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