Low‐complexity PTS schemes for PAPR reduction in OFDM systems

Hu, Chi; Wang, Lingyin; Zhou, Zhuang

doi:10.1049/iet-com.2020.0076

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…As stated in function (7), MER is the ratio of the ideal frequency domain signals' ⌢ X K squares sum to the error frequency domain signals'(the error of ideal frequency domain signals and demodulated transmitted signal X k = FFT(x k )) squares sum. Notice that CUPSO-PTS with the IBO-MER scheme, calculated the MER along with the fitness calculation of each particle as shown in function (19).…”

Section: Cupso-pts With Low Complexity Ibo-sdr Scheme Drawbacks (2)mentioning

confidence: 99%

“…In conclusion: Compared with the "IBO-MER" criteria, the "IBO-SDR" criteria saved significant computational complexity. From paper [44], the computational complexity of OPTS is shown in Table 1 To overcome drawback (2), this section proposed the CUPSO-PTS with the IBO-SDR scheme to acquire the whole-space optimal HPA's energy efficiency by a fixed MER = 𝜑 4 as FIGURE 7 The structure of CUPSO-PTS-FBMC scheme with low computational complexity IBO-SDR based HPA EE evaluation criterion follows:…”

Section: Computation Complexitymentioning

confidence: 99%

“…The traditional Orthogonal Frequency Division Multiplex (OFDM) multi-carrier scheme is widely operated in conventional communication systems. Still, its out-of-band [7] distortion on adjacent sub-carriers prevents it from persisting in being employed in high frequency network systems. The enhanced multi-carrier scheme Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation(FBMC-OQAM) [8] utilises prototype filter banks while transmitting signals so that the signal has the characteristics of low-side-lobes and low out-of-band radiation [9], which improves the overall spectral efficiency and can be employed in a variety of application scenarios.…”

Section: Introductionmentioning

confidence: 99%

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Continuous unconstrained PSO‐PTS strategy to maximize HPA energy efficiency for FBMC‐OQAM systems

Jin

et al. 2023

IET Communications

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In filter bank multi‐carrier (FBMC) with offset quadrature amplitude modulation (OQAM) systems, the major limitation of FBMC‐OQAM signaling is the high peak‐to‐average power ratio (PAPR). High PAPR results in increased hardware complexity and is also prone to non‐linear effects of high‐power amplifiers (HPA). The existing HPA energy‐efficient optimization strategies are constrained severely by the scarcity and heterogeneity of signal distribution in the degree of freedom. This paper theorizes the optimal FBMC‐OQAM signal distribution, which has a global and steady feature and evaluates the maximal HPA efficiency‐suited multi‐carrier modulation (MCM) signal. This paper first proposes that the Binary Particle Swarm Optimization based Partial Transmit Sequence (BPSO‐PTS) with the Input‐Back Off Modulation Error Ratio (IBO‐MER) scheme traces the signal distribution for maximal HPA efficiency to save supply‐side energy. This paper further proposes Continuous‐Unconstrained Particle Swarm Optimization based PTS(CUPSO‐PTS) with IBO‐MER to obtain the theoretical boundaries and drastically accelerate convergence in the continuous‐unconstrained searching space. To decrease the computational complexity of MER calculation, this paper proposes the CUPSO with IBO Signal‐to‐Distortion Ratio (IBO‐SDR), enabling it to meet more practical applications. The simulation results show that the proposed scheme outperforms conventional IBO and HPA efficiency schemes.

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Section: Cupso-pts With Low Complexity Ibo-sdr Scheme Drawbacks (2)mentioning

confidence: 99%

Section: Computation Complexitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Continuous unconstrained PSO‐PTS strategy to maximize HPA energy efficiency for FBMC‐OQAM systems

Jin

et al. 2023

IET Communications

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“…It is widely acknowledged that the beyond 5G wireless is adopted in many wireless transmission standards, such as IEEE 802.11 (WiFi), long term evolution (LTE), and World interoperability for microwave access (WiMax) etc. [9][10][11][12][13][14]. Many novel techniques, such as improved OFDM, massive multiple-input multiple-output (MIMO), millimeter (mm)-wave communications, space-to-ground communications etc., are regarded as key techniques for the beyond 5G communications networks [14,15].…”

Section: Introductionmentioning

confidence: 99%

Orthogonal frequency division multiplexing with cascade index modulation

Yang

Guo

et al. 2021

IET Communications

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As an emerging technique, index modulation (IM) can improve the system bit error rate (BER) performance due to the robustness of index bits over conventional modulated symbol bits. The existing IM aided orthogonal frequency division multiplexing (OFDM) schemes only employ one index modulator at the transmitter, which transmits a small amount of index bits in each transmission. In this paper, a novel IM technique, called cascade IM (CIM), is proposed to increase the proportion of the index bits in the transmission by combining the conventional IM with the multiple‐mode IM together. Subcarrier‐wise and subblock‐wise CIM schemes are proposed to achieve different spectral efficiency and diversity order for diverse scenarios in the next generation wireless communication networks. The optimal subcarrier‐wise maximum likelihood detector is proposed for OFDM‐CIM. To reduce the demodulation complexity, a novel tree search based and an iterative log‐likelihood ratio based detectors, which can avoid illegal index patterns in the search process, are developed for OFDM‐CIM. Monte Carlo simulations show that the proposed scheme achieves better BER performance than OFDM‐IM and appears as a competitive candidate of multi‐carrier transmission techniques for next generation wireless communication networks.

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PAPR reduction techniques in MIMO-OFDM communication systems

Ramadevi,

Rao

2024

INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING &Amp; COMMUNICATION ENGINEERING SYSTEMS: SPACES-2021

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Low‐complexity PTS schemes for PAPR reduction in OFDM systems

Cited by 5 publications

References 25 publications

Continuous unconstrained PSO‐PTS strategy to maximize HPA energy efficiency for FBMC‐OQAM systems

Continuous unconstrained PSO‐PTS strategy to maximize HPA energy efficiency for FBMC‐OQAM systems

Orthogonal frequency division multiplexing with cascade index modulation

PAPR reduction techniques in MIMO-OFDM communication systems

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