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Abstract: This paper proposes new scheme for efficient rate allocation in conjunctionwith reducing peak-to-average power ratio PAPR in orthogonalfrequency-division multiplexing OFDM systems. Modification of the setpartitioning in hierarchical trees SPIHT image coder is proposed to generatefour different groups of bit-stream relative to its significances. Thesignificant bits, the sign bits, the set bits and the refinement bits aretransmitted in four different groups. The proposed method for reducing the PAPRutilizes twice the unequal error protection UEP, using the Read-Solomon codesRS, in conjunction with bit-rate allocation and selective interleaving toprovide minimum PAPR. The output bit-stream from the source code SPIHT willbe started by the most significant types of bits first group of bits. Theoptimal unequal error protection UEP of the four groups is proposed based onthe channel destortion. The proposed structure provides significant improvementin bit error rate BER performance. Performed computer simulations have shownthat the proposed scheme outperform the performance of most of the recent PAPRreduction techniques in most cases. Moreover, the simulation results indicatethat the proposed scheme provides significantly better PSNR performance incomparison to well-known robust coding schemes.



Author: Usama S. Mohammed, H. A. Hamada

Source: https://arxiv.org/







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