Analysing the effect of modulation schemes and subcarriers on PAPR influence of Hybrid combination of Selective Mapping, Partial Transmit Sequence and Clipping

Pundir, Vandana; Ahmad, Anwar

doi:10.1109/inbush46973.2020.9392121

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…When the linear dynamic range of the high power amplifier (HPA) is insufficient, a large PAPR will cause severe distortion of the transmission signal [ 15 ]. Currently, various techniques have been proposed to reduce the PAPR, including clipping and filtering (CF) [ 16 , 17 , 18 ], compression-expansion transformation [ 19 , 20 ], and selective mapping (SLM) [ 21 , 22 ]. It is worth noting that for PAPR reduction in multi-carrier systems using message-passing (MP) decoding, the sparsity of the ECM must be maintained [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

A Message Passing-Assisted Iterative Noise Cancellation Method for Clipped OTFS-BFDM Systems

Bie

Wen

2022

Sensors

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Compared with orthogonal frequency division multiplexing (OFDM) systems, orthogonal time frequency space systems based on bi-orthogonal frequency division multiplexing (OTFS-BFDM) have lower out-of-band emission (OOBE) and better robustness to high-mobility scenarios, but suffer from a higher peak-to-average ratio (PAPR) in large data packets. In this paper, one-iteration clipping and filtering (OCF) is adopted to reduce the PAPR of OTFS-BFDM signals. However, the extra noise introduced by the clipping process, i.e., clipping noise, will distort the desired signal and increase the bit error rate (BER). We propose a message passing (MP)-assisted iterative cancellation (MP-AIC) method to cancel the clipping noise based on the traditional MP decoding at the receiver, which incorporates with the (OCF) at the transmitter to keep the sparsity of the effective channel matrix. The main idea of MP-AIC is to extract the residual signal fed to the MP detector by iteratively constructing reference clipping noise at the receiver. During each iteration, the variance of residual signal and channel noise are taken as input parameters of MP decoding to improve the BER. Moreover, the convergence probability of the modulation alphabet after MP decoding in the current iteration is used as the initial probability of MP decoding in the next iteration to accelerate the convergence rate of MP decoding. Simulation results show that the proposed MP-AIC method significantly improves MP-decoding accuracy while accelerating the BER convergence in the clipped OTFS-BFDM system. In the clipped OTFS-BFDM system with rectangular pulse shaping, the BER of MP-AIC with two iterations can be reduced by 72% more than that without clipping noise cancellation.

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Section: Introductionmentioning

confidence: 99%

A Message Passing-Assisted Iterative Noise Cancellation Method for Clipped OTFS-BFDM Systems

Bie

Wen

2022

Sensors

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Combining Clipping and Channel Coding for Effective PAPR Reduction in OFDM System with GNU Radio-USRP

Tuti,

Astawa,

Nadziroh

et al. 2024

2024 International Electronics Symposium (IES)

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Hybrid-Domain Evaluation PTS with Adaptive Selection Methods for PAPR Reduction

Jin

et al. 2022

Energies

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The partial transmit sequence (PTS) technique is a fairly suitable scheme to mitigate the high peak-to-average power ratio (PAPR) problem inherent in 5G multicarrier systems, especially considering a high-order QAM modulation design. However, the high computational complexity level and the speed of the convergence for optimizing the phases of the transmitting signal restrict this technique in practical applications. In this paper, a low-complexity frequency-domain-evaluated PTS (F-PTS) based on a spacing multiobjective (SMO) processing algorithm is proposed to reduce the PAPR values. The PAPR performance are accurately predicted in terms of modifying relative dispersion in the frequency domain. As a result, the complexity of searching the optimal phase factors and IFFT computing is simplified. Moreover, a frequency-domain- and time-domain-evaluating PTS (FTD-PTS) is employed to search the optimal solution with a reasonable complexity. Simulation results verify that the operation rate of F-PTS is significantly improved after transferring the exhaustive search strategy of PTS into the SMO algorithm, and the F-PTS PAPR reduction performance is just 0.3 dB away from theoretical optimal performance. The FTD-PTS spends an acceptable operation rate to obtain optimal PAPR reduction performance, which subtracts 0.5 and 0.6 dB more than PSO-PTS and conventional PTS at CCDF=10−3, respectively.

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Analysing the effect of modulation schemes and subcarriers on PAPR influence of Hybrid combination of Selective Mapping, Partial Transmit Sequence and Clipping

Cited by 3 publications

References 7 publications

A Message Passing-Assisted Iterative Noise Cancellation Method for Clipped OTFS-BFDM Systems

A Message Passing-Assisted Iterative Noise Cancellation Method for Clipped OTFS-BFDM Systems

Combining Clipping and Channel Coding for Effective PAPR Reduction in OFDM System with GNU Radio-USRP

Hybrid-Domain Evaluation PTS with Adaptive Selection Methods for PAPR Reduction

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