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Self-encoded spread spectrum (SESS) is a novel modulation technique that acquires its spreading sequence from the randomness of an input data stream rather than through the use of the traditional pseudo-random (PN) code generator. The statistical properties of random codes in SESS offer a number of advantages over the deterministic PN codes. In this paper we propose a multiple-input multiple-output...
A multiuser detection based on quantum particle swarm optimization (QPSO) with Pareto optimality is proposed for the space-time block coded-multicarrier code-division multiple-access (STBC-MC-CDMA) system. Due to the spatial diversity, the signals received at the different antennas are faded independently, resulting in an independent log-likelihood function (LLF) for each antenna. To resolve the multi-objective...
In this paper, a new type hybrid automatic-repeat-request (HARQ) scheme based on different space-time codes is proposed and evaluated. The new scheme is divided into three major steps which are V-BLAST processing, TSTC processing and STBC processing. In order to benefit from spatial diversity, the proposed method transfer the next line of data matrix and joint-decode them, not the same as simply signal...
Multi-hop relaying has proven to be an effective method of additional spatial diversity on wireless fading channels. This paper propose and analyze a simple technique that Cooperative Transmit Diversity (CTD) can be applicable to multi-hop relay enhanced diversity order to fading relay channels, and furthermore the system using X-OR with STBC half encoding at the relay that offers increased performance...
In this paper, we examine the spatial diversity of cooperative communications for image transmission without deploying multiple antennas at the transmitter. We propose a novel region of interest (ROI)-based scheme for image transmission over wireless cooperative/relay fading channels. By having the relay terminal assist the direct communications, we can increase the resilience for ROI against the...
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