A Novel Transmit Diversity Technique for MIMO System

You Yan Zhang; Shu Yue Hong

doi:10.4028/www.scientific.net/AMR.468-471.355

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 468-471A Novel Transmit Diversity Technique for MIMO...

A Novel Transmit Diversity Technique for MIMO System

Abstract:

The antenna diversity based on log-likelihood ratio (LLR) is better than that based on signal-to-noise ratio (SNR) in bit error rate performance for MIMO systems. Thus in this paper, we present a novel transmit antenna selection scheme based on bit log-likelihood ratio when the Alamouti code is employed .Then the BER expressions of application based on Bit-LLR (BLLR) for MPSK and MQAM modulation with Gray code are derived. The simulation results show that the new scheme based on BLLR is superior to SNR. With the increase of the transmit antennas, the performance of system is improved significantly. Furthermore, the diversity order is the same as that of the full complexity systems.

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Periodical:

Advanced Materials Research (Volumes 468-471)

Pages:

355-359

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.468-471.355

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Online since:

February 2012

Authors:

You Yan Zhang, Shu Yue Hong

Keywords:

Antenna Selection, Bit Log-Likelihood Ratio, MIMO, STBC

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