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Wireless Communications and Mobile Computing
Volume 2018, Article ID 8923478, 7 pages
https://doi.org/10.1155/2018/8923478
Research Article

A CCM-Based OFDM System with Low PAPR for Sparse Source

1Electronic and Information Engineering, Beihang University, Beijing 100191, China
2Collaborative Innovation Center of Geospatial Technology, Wuhan 43079, China

Correspondence should be addressed to Qin Huang; nc.ude.aaub@gnauhniq

Received 24 November 2017; Revised 6 February 2018; Accepted 19 February 2018; Published 21 March 2018

Academic Editor: Michael McGuire

Copyright © 2018 Qinbiao Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Orthogonal frequency division multiplexing (OFDM) usually suffers high peak-to-average power ratio (PAPR). As shown in this paper, PAPR becomes even severe for sparse source due to many identical nonzero frequency OFDM symbols. Thus, this paper introduces compressive coded modulation (CCM) in order to restrain PAPR by reducing identical nonzero frequency symbols for sparse source. As a result, the proposed CCM-based OFDM system, together with iterative clipping and filtering, can efficiently restrain the high PAPR for sparse source. Simulation results show that it outperforms about 4 dB over the traditional OFDM system when source sparsity is 0.1.