A Novel Semi-Blind Selected Mapping Technique for PAPR Reduction in OFDM

Badran, Ehab F.; El-Helw, Amr

doi:10.1109/lsp.2011.2160720

Cited by 29 publications

(30 citation statements)

References 7 publications

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“…As a consequence, higher order modulation symbols would influence the accuracy of SI detection. The scheme in [10] realizes semiblind SI detection in the SLM. However, this scheme requires embedding the SI in transmit symbols.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Cyclic Shift with Delayed Correlation and Matched Filtering in Time Domain Cyclic-SLM for PAPR Reduction

Pamungkasari

Sanada

2016

International Scholarly Research Notices

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Time domain cyclic-selective mapping (TDC-SLM) reduces the peak-to-average power ratio (PAPR) in OFDM systems while the amounts of cyclic shifts are required to recover the transmitted signal in a receiver. One of the critical issues of the SLM scheme is sending the side information (SI) which reduces the throughputs in wireless OFDM systems. The proposed scheme implements delayed correlation and matched filtering (DC-MF) to estimate the amounts of the cyclic shifts in the receiver. In the proposed scheme, the DC-MF is placed after the frequency domain equalization (FDE) to improve the accuracy of cyclic shift estimation. The accuracy rate of the propose scheme reaches 100% at E b/N 0 = 5 dB and the bit error rate (BER) improves by 0.2 dB as compared with the conventional TDC-SLM. The BER performance of the proposed scheme is also better than that of the conventional TDC-SLM even though a nonlinear high power amplifier is assumed.

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Section: Introductionmentioning

confidence: 99%

Estimation of Cyclic Shift with Delayed Correlation and Matched Filtering in Time Domain Cyclic-SLM for PAPR Reduction

Pamungkasari

Sanada

2016

International Scholarly Research Notices

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“…A technique that enabled the receiver to recover the data without side information was introduced in [1]; in other words, the PRVs have the ability to make the receiver remove the side information, the cost of which was paid in terms of the degradation in the BER performance because this method is applicable to small constellation mappings. However, non-unity power PRVs were proposed [5,25], and normalized Riemann sequences were also used [19], but such sequences will change the minimum constellation distance, which leads to a degradation in the BER performance accordingly. Moreover, binary chaotic sequences [29] were implied in a technique that generates PRVs from each other, but the PAPR performance was degraded.…”

Section: Introductionmentioning

confidence: 99%

Post-IFFT-Modified Selected Mapping to Reduce the PAPR of an OFDM System

Taher

Singh

Ismail

et al. 2014

Circuits Syst Signal Process

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Orthogonal frequency-division multiplexing is now one of the most important modulation techniques due to its advantages. Despite its ability to overcome the equalization problem, multipath fading channels, and other issues, this system has a serious problem concerning the high output peaks with respect to the average power, which is called the peak-to-average power ratio (PAPR). Selected mapping (SLM), partial transmitted sequence, and amplitude clipping and filtering are some efficient methods to reduce the PAPR. In a previous work, we slid a single-phase rotation vector Circuits Syst Signal Process on the data sequence in the frequency domain to reduce the PAPR and the complexity compared to the conventional SLM. In this paper, we present a novel method that utilizes the same approach of our previous work, but it processes the data after the inverse fast Fourier transform block (time-domain operations) using a modified version of the SLM scheme, which has less computational complexity than the conventional one. The mathematical derivations and the simulation results show that the PAPR, the computational complexity, and the side information were reduced significantly by the proposed method.

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“…Stephane et al [16] proposed a selected mapping method to minimize the PAPR of OFDM. Ehab et al [17] proposed a new semi-blind SLM scheme to reduce PAPR. Suckchel Yang et al [18] proposed PSLM scheme to reduce the computational complexity in SLM.…”

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confidence: 99%

PAPR Performance Analysis of low Complexity SLM for Various Phase Sequences in MIMO-OFDM System

Pyla¹,

Raju²,

Balasubrahmanyam³

2019

IJRTE

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Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO OFDM) is a key technology for contemporary communication systems due to its spectral efficiency, higher data rates, better diversity gain, good link reliability and both inter symbol interference (ISI) and multipath fading free transmission. However, due to the presence of OFDM, MIMO-OFDM suffers from high peak to average power ratio (PAPR). Even though, several schemes are available to mitigate PAPR, there is no standard solution. Selective Mapping (SLM) significantly reduces the PAPR in OFDM systems at the cost of computational complexity (CC). The CC of SLM can be reduced by proper design of SLM. This paper considers a low complexity SLM (LC SLM) scheme in which both the CC and length of the index of selected phase sequence are significantly reduced. The PAPR of an SLM-OFDM depends on the number of subcarriers in OFDM, the number of candidate blocks in SLM and selected phase sequence and this paper investigate various phase sequences and analyses their PAPR performance. Simulation results show the superior performance of Riemann sequence over the other phase sequences.

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A Novel Semi-Blind Selected Mapping Technique for PAPR Reduction in OFDM

Cited by 29 publications

References 7 publications

Estimation of Cyclic Shift with Delayed Correlation and Matched Filtering in Time Domain Cyclic-SLM for PAPR Reduction

Estimation of Cyclic Shift with Delayed Correlation and Matched Filtering in Time Domain Cyclic-SLM for PAPR Reduction

Post-IFFT-Modified Selected Mapping to Reduce the PAPR of an OFDM System

PAPR Performance Analysis of low Complexity SLM for Various Phase Sequences in MIMO-OFDM System

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