Analysis of PAPR reduction performance of SLM schemes with correlated phase vectors

Heo, Seok-Joong; Joo, Hyun-Seung; No, Jong-Seon; Lim, Dae‐Woon; Shin, Dong-Joon

doi:10.1109/isit.2009.5205837

Cited by 17 publications

(12 citation statements)

References 4 publications

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“…It is widely known that the U alternative OFDM-IM signals have to be mutually independent to guarantee the PAPR reduction performance of SLM [19]. The method to lower the dependency between the alternative OFDM-IM signals will be discussed in subSections IV-A and IV-B.…”

Section: A Efficiency Of Permutation In the Slm Scheme For Ofdm-im Smentioning

confidence: 99%

On the Phase Sequences and Permutation Functions in the SLM Scheme for OFDM-IM Systems

Kim

2020

IEEE Access

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In orthogonal frequency division multiplexing with index modulation (OFDM-IM), the active subcarriers can convey information bits by modulated symbols as well as their indices. OFDM-IM has attracted a great deal of attention from researchers by virtue of high energy efficiency. Unfortunately, OFDM-IM has inherited large peak-to-average power ratio (PAPR) of the classical OFDM signal, but there are few works dealing with it. Selected mapping (SLM) is a promising PAPR reduction technique that is distortionless, has good PAPR reducing capability, and can be easily adapted in OFDM-IM systems. In SLM for OFDM-IM systems, the phase sequences rotate the OFDM-IM block in the frequency domain before the inverse fast Fourier transform (IFFT) is applied. Also, in the recent work, permutation procedure in the frequency domain has been proposed before multiplication of phase sequences in SLM, which is newly introduced in OFDM-IM regime. Unfortunately, the theoretical investigation on the efficiency of the permutation in SLM is insufficient. In this paper, we investigate the phase sequence set (PSS) and permutation functions in the SLM scheme for OFDM-IM systems; First, the efficiency of the permutation is analyzed as a function of the number of active subcarriers. Second, the optimal conditions for the PSS and permutation functions are derived, which is verified through simulations. INDEX TERMS Index modulation (IM), orthogonal frequency division multiplexing (OFDM), peak-toaverage power ratio (PAPR), permutation, phase sequence, selected mapping (SLM).

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Section: A Efficiency Of Permutation In the Slm Scheme For Ofdm-im Smentioning

confidence: 99%

On the Phase Sequences and Permutation Functions in the SLM Scheme for OFDM-IM Systems

Kim

2020

IEEE Access

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“…It is well known that the optimal phase rotation vectors should be orthogonal and aperiodic for SLM scheme [22]. However, for the correlated phase rotation vectors, the PAPR reduction performance can be analysed by using the relation between the correlation of component powers of alternative OFDM signal sequences and the correlation of phase rotation vectors as in [23]. Let P j c (n), 0 ≤ n ≤ N − 1, denote the nth component power |x j (n)| 2 of the jth alternative OFDM signal sequence x j .…”

Section: Good Shift Values For the Proposed Slm Schemementioning

confidence: 99%

“…Let P j c (n), 0 ≤ n ≤ N − 1, denote the nth component power |x j (n)| 2 of the jth alternative OFDM signal sequence x j . In [23], a design criterion of phase rotation vectors in SLM Fig. 5 Alternative OFDM signal sequence generated by the proposed scheme for N = 8 and i = 1 using a 0 = 1 and a 1 = 0 www.ietdl.org scheme with U alternative OFDM signal sequences was derived by using the correlation coefficient ρ jv (t) between P j c (n) and…”

Section: Good Shift Values For the Proposed Slm Schemementioning

confidence: 99%

Low‐complexity selected mapping scheme using cyclic‐shifted inverse fast Fourier transform for peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing systems

Kim¹,

Jeon²,

No³

et al. 2013

IET Communications

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In this study, a new peak-to-average power ratio (PAPR) reduction scheme for orthogonal frequency division multiplexing (OFDM) is proposed based on the selected mapping (SLM) scheme. The proposed SLM scheme generates alternative OFDM signal sequences by cyclically shifting the connections in each subblock at an intermediate stage of inverse fast Fourier transform (IFFT). Compared with the conventional SLM scheme, the proposed SLM scheme achieves similar PAPR reduction performance with much lower computational complexity and no bit error rate degradation. The performance of the proposed SLM scheme is analysed mathematically and verified through numerical analysis. Also, it is shown that the proposed SLM scheme has the lowest computational complexity among the existing low-complexity SLM schemes exploiting the signals at an intermediate stage of IFFT.

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“…It denotes the probability that the PAPR of a data symbol exceeds a predefined threshold as expressed by (Han et al, 2005;Heo et al, 2009):…”

Section: Fpga Implementation Of Inverse Fast Fourier Transform In Ortmentioning

confidence: 99%

FPGA Implementation of Inverse Fast Fourier Transform in Orthogonal Frequency Division Multiplexing Systems

Mohammady¹,

Sulaiman²,

Sidek³

et al. 2012

Fourier Transform - Signal Processing

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Analysis of PAPR reduction performance of SLM schemes with correlated phase vectors

Cited by 17 publications

References 4 publications

On the Phase Sequences and Permutation Functions in the SLM Scheme for OFDM-IM Systems

On the Phase Sequences and Permutation Functions in the SLM Scheme for OFDM-IM Systems

Low‐complexity selected mapping scheme using cyclic‐shifted inverse fast Fourier transform for peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing systems

FPGA Implementation of Inverse Fast Fourier Transform in Orthogonal Frequency Division Multiplexing Systems

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