一种降低MIMO-OFDM系统PAPR的半盲SLM方法

doi:10.3969/j.issn.1001-2400.2015.05.003

Abstract

Abstract:

A semi-blind selected mapping(SLM) scheme is addressed to reduce the peak-average-power ratio(PAPR) of Alamouti coded multiple-input multiple-output orthogonal frequency division multiplexing(MIMO-OFDM) systems．To enable low computational complexity as well as embedding of the side information into the data symbols at the transmitter, the input OFDM symbol sequence is partitioned into several interleaved subblocks, each of which is transformed into time-domain candidate signals by using the conversion vectors, and then the candidate signals for each subblock are multiplied with different phase offset factors and added up to obtain the transmitted candidate signals. At the receiver, the side information can be obtained by jointly detecting the phase offset factors of each subblock and the transmitted data can be detected without transmitting the side information. Analysis and simulation show that the proposed scheme can achieve a better side information detection performance and almost the same PAPR reduction and bit error rate(BER) performance with a much lower complexity at both the transmitter and receiver, as compared to the available semi-blind SLM schemes.

Key words: multiple-input multiple-output orthogonal frequency division multiplexing(MIMO-OFDM), peak-to-average power ratio(PAPR), selected mapping(SLM), side information

CLC Number:

TN911.7

JI Jinwei;REN Guangliang;ZHANG Huining. Semi-blind SLM scheme for reducing the PAPR of MIMO-OFDM systems[J].J4, 2015, 42(5): 13-19+146.

References

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Semi-blind SLM scheme for reducing the PAPR of MIMO-OFDM systems

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