Abstract
An inherent issue of multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) technique is its high peak-to-average power ratio (PAPR) over distinct antennas. Selective mapping (SLM) is one of the most prevalent methods to reduce the PAPR without inducing any signal deformation in OFDM or MIMO-OFDM systems. The main drawback of the SLM technique is the need for sending side information (SI) with each OFDM data symbol for retrieving the transmitted data. In this paper, we present a low complexity SLM technique using Hadamard sequence to substantially reduce the PAPR in MIMO-OFDM systems without the need for transmitting SI thus resulting in improved data rate/ bandwidth efficiency. Simulation studies show that the proposed method achieves a significant reduction in PAPR and improves the bit error rate (BER) performance of the communication system as compared to some prevailing methods.
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