Low-complexity selected mapping schemes for peak-to-average power ratio reduction in OFDM systems

Wang, Chin-Liang; Ouyang, Yuan

doi:10.1109/tsp.2005.859327

Cited by 205 publications

(13 citation statements)

References 16 publications

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“…4.3 and 4.4 and the simulation results obtained by simulating 10 5 randomly generated input symbol sequences with 16-quadrature amplitude modulation (16-QAM) for each subcarrier. Since the distribution of p B u (b u ) for the Nyquist sampling and four-times oversampling cases in (10) and (16) are too complex to deal with, numerical integration and least squares curve fitting of Υ(γ),Ψ(γ), and Φ(γ) in (19) are utilized to obtain analytical results. The number of subcarriers is N = 256 and the numbers of the alternative OFDM signal sequences are…”

Section: Comparison Between Analytical and Simulation Resultsmentioning

confidence: 99%

“…OFDM has been adopted as a standard modulation method in many wireless communication systems such as digital audio broadcasting (DAB), digital video broadcasting (DVB), IEEE 802.11 wireless local area network (WLAN), and IEEE 802. 16 wireless metropolitan area network (WMAN). Similar to other multicarrier schemes, OFDM suffers from the high peak-to-average power ratio (PAPR) problem, which makes its implementation quite costly.…”

Section: Introductionmentioning

confidence: 99%

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An Efficient Selection Method of a Transmitted OFDM Signal Sequence for Various SLM Schemes

Kim

Joo

et al. 2016

IEICE Trans. Commun.

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Many selected mapping (SLM) schemes have been proposed to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signal sequences. In this paper, an efficient selection (ES) method of the OFDM signal sequence with minimum PAPR among many alternative OFDM signal sequences is proposed; it supports various SLM schemes. Utilizing the fact that OFDM signal components can be sequentially generated in many SLM schemes, the generation and PAPR observation of the OFDM signal sequence are processed concurrently. While the u-th alternative OFDM signal components are being generated, by applying the proposed ES method, the generation of that alternative OFDM signal components can be interrupted (or stopped) according to the selection criteria of the best OFDM signal sequence in the considered SLM scheme. Such interruption substantially reduces the average computational complexity of SLM schemes without degradation of PAPR reduction performance, which is confirmed by analytical and numerical results. Note that the proposed method is not an isolated SLM scheme but a subsidiary method which can be easily adopted in many SLM schemes in order to further reduce the computational complexity of considered SLM schemes. key words: inverse fast Fourier transform (IFFT), low complexity, orthogonal frequency division multiplexing (OFDM), peak-to-average power ratio (PAPR), selected mapping (SLM) Dong-Joon Shin received the B.Sc. degree

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Section: Comparison Between Analytical and Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Efficient Selection Method of a Transmitted OFDM Signal Sequence for Various SLM Schemes

Kim

Joo

et al. 2016

IEICE Trans. Commun.

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“…However, the conventional SLM PAPR reduction scheme usually requires very high computational complexity. To reduce the computational complexity of the conventional SLM PAPR reduction scheme, many modified SLM PAPR reduction schemes have been proposed [6][7][8][9][10], most of which reduce the computational complexity of the conventional SLM PAPR reduction by decreasing the number of inverse fast Fourier transforms (IFFTs) involved in generating candidate signals. For instance, in [6], a modified SLM scheme was proposed to reduce the computational complexity of the conventional SLM PAPR reduction scheme, where the IFFT computations were reduced by generating a large number of the candidate signals from some of the remainder generated by IFFTs.…”

Section: Introductionmentioning

confidence: 99%

Low-Complexity Blind Selected Mapping Scheme for Peak-to-Average Power Ratio Reduction in Orthogonal Frequency-Division Multiplexing Systems

Xia

2018

Information

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Orthogonal frequency-division multiplexing (OFDM) is an attractive multicarrier technique for the simplicity of equalization and high data throughput. However, the transmitted OFDM signal has a very high peak-to-average power ratio (PAPR), which severely degrades the performance of practical OFDM systems and reduces the efficiency of high-power amplifiers (HPA). The selected mapping (SLM) scheme is an effective PAPR reduction method of OFDM signals. However, this approach usually requires side information (SI) transmission, which increases the difficulty of the hardware implementation with high complexity and reduces the data transmission rate. In this paper, based on designing phase rotation vectors in the time domain, a novel blind SLM method with low complexity is proposed to reduce the PAPR of OFDM signals. At the transmitter, the proposed method properly designs the phase rotation vectors in the time domain, which can be considered as an equivalent wireless channel without SI transmission. At the receiver, the effect of phase rotation vectors can be removed by the conventional channel estimation method, and the data demodulation processing can be easily performed by the frequency domain equalization. Simulation results show that the proposed scheme can achieve low complexity in PAPR reduction and has great robustness in bit error rate (BER) performance compared to the other low-complexity SLM PAPR schemes.

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“…Moreover, SLM has large computational complexity because it requires several inverse discrete Fourier transform (IDFT) operations and it makes the restrictions in implementation. A lower-complexity SLM scheme has also been proposed to solve this problem [4–15]. …”

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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Low-complexity selected mapping schemes for peak-to-average power ratio reduction in OFDM systems

Cited by 205 publications

References 16 publications

An Efficient Selection Method of a Transmitted OFDM Signal Sequence for Various SLM Schemes

An Efficient Selection Method of a Transmitted OFDM Signal Sequence for Various SLM Schemes

Low-Complexity Blind Selected Mapping Scheme for Peak-to-Average Power Ratio Reduction in Orthogonal Frequency-Division Multiplexing Systems

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

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