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A Novel Nonlinear Constellation Precoding for OFDM Systems with Subcarrier Grouping

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Abstract

This paper proposed a novel nonlinear constellation precoding (NCP) technique based on maximum distance separable (MDS) codes in orthogonal frequency-division multiplexing (OFDM) systems. The proposed method envisage to maximize both the diversity and coding gains for any number of diversity channels and desired diversity orders. The novel NCP technique combined with subcarrier groping in OFDM systems to replace the most existing linear constellation precoding (LCP) scheme. In this scheme, the full set of subcarriers are splitted into smaller groups and the codewords are constructed from \(q\) point constellation mapper with MDS encoder. The maximum-likelihood (ML) decoder is used in the most existing signal space diversity technique which is replaced by diversity channel selection (DCS) to reduce the decoding complexity with the cost of marginal performance loss. The effect of the Inter-carrier interference (ICI) introduced by the carrier frequency offsets (CFO) also analyzed in the proposed OFDM system. The superiority of the proposed novel NCP technique over the previously proposed designs is verified by simulation results.

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  1. Department of Electronics and Communication Engineering, National Institute of Technology (NIT), Tiruchirappalli, India

    M. Raja & P. Muthuchidambaranathan

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  1. M. Raja
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  2. P. Muthuchidambaranathan
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Correspondence to M. Raja.

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Raja, M., Muthuchidambaranathan, P. A Novel Nonlinear Constellation Precoding for OFDM Systems with Subcarrier Grouping. Wireless Pers Commun 73, 867–884 (2013). https://doi.org/10.1007/s11277-013-1221-x

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