PAPR Reduction in MIMO OFDM Using Adaptive SLM Scheme
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 5
Abstract
Multiple-Input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) is reliable and most attractive technique for high data rate communications. MIMO uses spatial diversity to accept multiple "best" signals simultaneously. Each antenna is able to transmit or receive signals, where the legacy system can only accept the single "best" signal. The main drawback of orthogonal frequency division multiplexing systems is high Peak to Average Power Ratio (PAPR), which results in poor power efficiency, degradation in bit-error-rate (BER) performance, and spectral spreading efficiency. The needed measure for better wireless communication is to reduce PAPR. The proposed system introduces Adaptive Selected mapping (ASLM) techniques. In this technique, the sums of separated data blocks are created from an OFDM data block using a set of phase sequence. It chooses lowest PAPR and selects sequences for transmission. As an outcome, the adaptive selected mapping increases the power efficiency and reduces the impulse interference.
Authors and Affiliations
P. Kothai, R. Prabh
Keywords
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