Low complexity PAPR reduction in OFDM using both selective mapping and clipping methods

Reddy, D. Shyam Prasad; Sudha, V.; Sriramkumar, D.

doi:10.1109/iccsp.2014.6950042

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…So, synchronization is the important factor to be considered while designing. This chapter addresses the concept of synchronization algorithm and its errors in OFDM system [4][5]. The undesirable changes in the OFDM transmission through the channel, if any, will be identified at the receiver end and they have to be rectified.…”

Section: Introductionmentioning

confidence: 99%

Estimating Time and Frequency under Imperfect Channel Knowledge using ECM and SAGE Algorithms in Multi-relay Cooperative Networks

CHENGUTTUVAN,

KARUPPIAH,

2023

Preprint

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The OFDM system is popular due to its broadband capabilities, but because it employs the multi-carrier concept, synchronization issues may arise. These errors are caused by the incompatibility of the transmitted and received signals. The performance of multiple relay cooperative systems is assessed in this study using receiver compensation and estimation of Multicarrier Frequency Offsets (MCFO) and Multiple Timing Offsets (MTO). To demonstrate improved bit error rate (BER) performance, MCFOs and MTOs should be treated with less computational complexity. At the receiver end, the Maximum Likelihood (ML) approach is used to decode data and estimate offsets. The ML approach estimates using the ECM and SAGE algorithms. In terms of BER and SNR after estimation, the SAGE algorithm outperforms the ECM approach. A performance analysis of the estimated time and carrier frequency offsets was performed using the ECM and SAGE algorithms. Furthermore, the statistical percentage difference demonstrates that the maximum probability strategy for compensating the CFO and TO is effective.

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Section: Introductionmentioning

confidence: 99%

Estimating Time and Frequency under Imperfect Channel Knowledge using ECM and SAGE Algorithms in Multi-relay Cooperative Networks

CHENGUTTUVAN,

KARUPPIAH,

2023

Preprint

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“…To solve this problem, PA linearisation techniques aiming at extending the PA linear range and the PAPR reduction such as clipping, Selective Mapping [5] and Crest Factor Redcution (CFR) [6] have been investigated in previous years respectively. The PA linearisation methods includes predistortion methods and PA improvement methods [7–9].…”

Section: Introductionmentioning

confidence: 99%

Distortion‐characteristic estimation predistorter for high efficiency power amplifiers

Ren

Chen

2016

IET signal process.

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Power amplifier (PA) is one of important components in wireless communication system. However, its non‐linear and memory characteristic cause harmful distortion, which significantly decreases the power efficiency and wastes electronic energy since the power of PA needs back off. To overcome the non‐linear and memory problems, a novel method based on distortion‐characteristic estimation algorithm is developed in this study. The main innovation of this study is manifested in two aspects: first, the authors use well designed training signals to estimate the distortion characteristic of the PA; second, a novel PA characteristic estimation algorithm is developed in order to calculate the optimal state of the ideal predistorter that behaves like the inverse characteristic of PA theoretically. Since this novel method does not require the error between original signals and feedback signals, it can avoid the significant errors caused by the time mismatch between source signals and feedback signals, and can increase the power efficiency of the PA. The simulation results validate the performance increase and the synchronisation‐error immunity over the existing simplified filter look up table method.

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PAPR Reduction in SDR-Based OFDM System

Chandini

Rajagopal

2022

Evolutionary Computing and Mobile Sustainable Networks

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Low complexity PAPR reduction in OFDM using both selective mapping and clipping methods

Cited by 3 publications

References 10 publications

Estimating Time and Frequency under Imperfect Channel Knowledge using ECM and SAGE Algorithms in Multi-relay Cooperative Networks

Estimating Time and Frequency under Imperfect Channel Knowledge using ECM and SAGE Algorithms in Multi-relay Cooperative Networks

Distortion‐characteristic estimation predistorter for high efficiency power amplifiers

PAPR Reduction in SDR-Based OFDM System

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