Peak to Average Power Ratio (PAPR) Reduction in OFDM System

Malik, Nik Noordini Nik Abd; Ngajikin, Nor Hafizah; Idrus, Sevia Mahdaliza; Latif, N.

doi:10.1109/rfm.2006.331041

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…The main limitation of OFDM multicarrier is out-of-band emission (OOBE) [14,15], which makes it hard to coexist with other communication systems. The other limitation of OFDM is the peak average power ratio (PAPR), which is high [16,17]. As the multicarrier is also sensing a channel to avoid interference, the choice of developed MCM techniques [1], such as UFMC, has become an essential part of designing the physical layer of 5G wireless communication systems.…”

Section: Ufmc System Modelmentioning

confidence: 99%

Modified entropy based least square channel estimation technique for 5G massive multiple input multiple output universal filtered multicarrier systems

Shaik

Malik²

2023

Eng. Res. Express

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These days’ Massive multiple input multiple output (mMIMO) systems have become popular because of their enhanced data transmission rates, robustness against multipath fading, enhanced spectral efficacy, and ability to communicate with a more significant number of users with immense coverage. The critical challenge of the mMIMO systems is precisely replenishing the channel state information (CSI), along with the synchronization between receiver and transmitter. The CSI has recovered with the help of various channel estimation (CE) techniques. This paper presents a modified entropy-based least square CE technique for 5G mMIMO-UFMC systems. The proposed CE technique performance is novel and better than the Least Square (LS) and minimum mean square error (MMSE) CE techniques. The proposed CE technique was evaluated using MATLAB, and its performance results are shown in the simulation. The performance results of the proposed CE are evaluated based on the mean square error (MSE) and bit error rate (BER) of the obtained signal. The executed results prove that the proposed CE is efficient compared to conventional CE methods. The performance of the MCM techniques with respect to the proposed CE is also presented in this paper. This paper also explains the analytical assessment of the LS, MMSE, and MELS CE techniques. The results show that at high values of SNR, the proposed algorithm outperforms the LS and MMSE for both BER and MSE.

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Section: Ufmc System Modelmentioning

confidence: 99%

Modified entropy based least square channel estimation technique for 5G massive multiple input multiple output universal filtered multicarrier systems

Shaik

Malik²

2023

Eng. Res. Express

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“…In this paper, GA is used to optimize a MIMO-OFDM radar system and minimize the peak-to-average power ratio (P APR) problem, which appears due to the inherent nature of the OFDM modulation technique, which reduces the linearity performance of the nonlinear devices used in the transmitter, such as digital-to-analog converters, mixers, and power amplifiers [5]. Comparing to this work, conventional techniques that were found in the literature could be categorized as found in [8][9] into four main categories; clipping, coding, selected mapping and partial transmit sequence. In this paper, a new work based the genetic algorithm is proposed to overcome the drawbacks that found in the previously published work in the literature, such as the wasted power, the large needed bandwidth and the complexity in mathematical calculations.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the MIMO-OFDM Radar systems performance using GA

Daoud

Damati

Al-Sawalmeh

2010

2010 7th International Multi- Conference on Systems, Signals and Devices

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This paper proposes a new peak-to-average power ratio (PAPR) reduction method for a multiple-input multiple output (MIMO)-orthogonal frequency division multiplexing (OFDM) systems based on a genetic algorithm (GA). It has been introduced to be compatible with Radar systems, where the GA was used to optimize the MIMO-OFDM symbols in such way that could improve the system's performance. During this work, there was a comparison that has been stated among three systems; original radar system, radar system-based MIMO OFDM and radar system-based MIMO-OFDM uses GA. Finally, a range of simulation results are provided to demonstrate the superiority of the proposed scheme, since it is showed an enhancement in the coverage distance besides reducing the P APR effects.

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“…Generally, there are four main categories of PAPR reduction schemes: clipping & peak windowing [4][5][6], block coding [7], selected mapping (SLM) [8,9] and partial transmit sequences (PTS) scheme [10]. It is known that PTS can effectively reduce the PAPR by increasing the number of sub-blocks without modifying the number of subcarriers.…”

Section: Introduction Ulti-carriermentioning

confidence: 99%

An Intelligent Genetic Algorithm for PAPR Reduction in a Multi-Carrier CDMA Wireless System

Zhang

Chen³

et al. 2008

2008 International Wireless Communications and Mobile Computing Conference

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Abstract-A novel intelligent genetic algorithm (GA), called Minimum Distance guided GA (MDGA) is proposed for peak-average-power ratio (PAPR) reduction based on partial transmit sequence (PTS) scheme in a synchronous Multi-Carrier Code Division Multiple Access (MC-CDMA) system. In contrast to traditional GA, our MDGA starts with a balanced ratio of exploration and exploitation which is maintained throughout the process. It introduces a novel replacement strategy which increases significantly the convergence rate and reduce dramatically computational complexity as compared to the conventional GA. The simulation results demonstrate that, if compared to the PAPR reduction schemes using exhaustive search and traditional GA, our scheme achieves 99.52% and 50+% reduction in computational complexity respectively.

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Peak to Average Power Ratio (PAPR) Reduction in OFDM System

Cited by 6 publications

References 9 publications

Modified entropy based least square channel estimation technique for 5G massive multiple input multiple output universal filtered multicarrier systems

Modified entropy based least square channel estimation technique for 5G massive multiple input multiple output universal filtered multicarrier systems

Enhancing the MIMO-OFDM Radar systems performance using GA

An Intelligent Genetic Algorithm for PAPR Reduction in a Multi-Carrier CDMA Wireless System

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