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Comparison of architectures for PAPR reduction in OFDM combining pilot symbols with constellation extension | IEEE Conference Publication | IEEE Xplore

Comparison of architectures for PAPR reduction in OFDM combining pilot symbols with constellation extension


Abstract:

A main drawback of Orthogonal Frequency Division Multiplexing (OFDM) systems is that they suffer from a high Peak-to-Average Power Ratio (PAPR) at the transmitted signal....Show More

Abstract:

A main drawback of Orthogonal Frequency Division Multiplexing (OFDM) systems is that they suffer from a high Peak-to-Average Power Ratio (PAPR) at the transmitted signal. We propose three different architectures of a PAPR reduction technique combining pilot symbols with constellation extension. These architectures make use of a metric-based amplitude predis-tortion algorithm for the constellation extension embedded with orthogonal pilot symbols. Since neither the constellation extension nor the orthogonal pilots degrade the Bit Error Rate (BER), then the combined architectures also guarantee system performance. The three proposals outperform the previous algorithms (SAP and OPS) in terms of PAPR reduction, due to adequately joining pilots symbols with constellation extension. Moreover, the three architectures are examined from a complexity point of view, yielding a comparison in terms of computational load, what is straightforwardly related to implementation energy efficiency.
Published in: Eurocon 2013
Date of Conference: 01-04 July 2013
Date Added to IEEE Xplore: 10 October 2013
ISBN Information:
Conference Location: Zagreb, Croatia

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