A low-complexity modified SLM with new phase sequences for PAPR reduction in OFDM system

Sudha, V.; Anilkumar, Bhukya; Samatha, M.S.; Kumar, Dharmendra

doi:10.1109/indicon.2015.7443458

Cited by 9 publications

(5 citation statements)

References 11 publications

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“…SIMULATION RESULTS In this section, several simulation results are presented to illustrate the performance of the proposed ADMM-Direct and ADMM-Relax. We compare the proposed algorithms with the RCF approach [10], Aggarwal SOCP approach [14], simplified OICF approach [17], modified SLM approach [28] and lowcomplexity tone injection scheme [29].…”

Section: Computementioning

confidence: 99%

Optimized Signal Distortion for PAPR Reduction of OFDM Signals With IFFT/FFT Complexity Via ADMM Approaches

Wang

Shi

2019

IEEE Trans. Signal Process.

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In this paper, we propose two low-complexity optimization methods to reduce peak-to-average power ratio (PAPR) values of orthogonal frequency division multiplexing (OFDM) signals via alternating direction method of multipliers (ADMM). First, we formulate a non-convex signal distortion optimization model based on minimizing data carrier distortion such that the constraints are placed on PAPR and the power of free carriers. Second, to obtain the model's approximate optimal solution efficiently, we design two low-complexity ADMM algorithms, named ADMM-Direct and ADMM-Relax respectively. Third, we show that, in ADMM-Direct/-Relax, all the optimization subproblems can be solved semi-analytically and the computational complexity in each iteration is roughly O(ℓN log 2 ℓN ), where ℓ and N are over-sampling factor and carrier number respectively. Moreover, we show that the resulting solution of ADMM-Direct is guaranteed to be some Karush-Kuhn-Tucker (KKT) point of the non-convex model when the iteration algorithm is convergent. For ADMM-Relax, we prove that it has theoretically guaranteed convergence and can approach arbitrarily close to some KKT point of the model if proper parameters are chosen. Simulation results demonstrate the effectiveness of the proposed approaches.Index Terms-Orthogonal frequency division multiplexing (OFDM), peak-to-average power ratio (PAPR), free carrier power overhead (FCPO), signal distortion, alternating direction method of multipliers (ADMM).

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Section: Computementioning

confidence: 99%

Optimized Signal Distortion for PAPR Reduction of OFDM Signals With IFFT/FFT Complexity Via ADMM Approaches

Wang

Shi

2019

IEEE Trans. Signal Process.

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“…Riemann matrix (R) is used to provide phase sequence set. In the proposed method, the rows of normalized Riemann matrix (A) [28] are selected as the phase sequence vector [29] in the SLM technique for PAPR reduction [28], [29].The Riemann matrix (A)of the size NxN is obtained by removing the first row and first column of matrix (R) of size (N+1) X (N+1) [30].Where…”

Section: Riemann Matrix Phase Sequence Set Generationmentioning

confidence: 99%

Peak-to-average power ratio reduction in wavelet packet modulation Using Binary Phase Sequence.

Kulkarni¹,

Bhalchandra²

2019

IJEECS

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<p class="1">A novel method of Peak–to-Average–Power-Ratio reduction is presented in this paper using WPT for multi carrier modulationand Riemann matrix for phase sequencing in SLM. Wavelet Packet Multicarrier Modulation(WPM) is a betteralternative to the existing multicarrier transmission system,OFDM system which suffers from high PAPR.Further reduction in Peak to Average Power Ratio (PAPR)is achieved by using Wavelet Packet Modulation(WPM) with SLM technique. Classical SLM uses random phases for phase rotations which suffers from the additional load of transmitting SI(side Information) to receiver. So to overcome a novel method is proposed here which uses the principle of varying the phases of the subcarrier data block to be transmitted ,using rows of the normalised Reimann matrix as phase sequence vectors for the Selected Mapping (SLM)Technique. The generated WPM frame with minimum PAPR is selected and transmitted .The proposed system achieves a significant improvement in PAPR reduction over the OFDM-classical SLM and WPM-classical SLM.</p>

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“…Binary string is used to represent the compress string in the system and to reduce the overall number of bits used to encode the string. The Huffman coding is then used to find the minimum length of bit string which can be used to encode the string of symbols [23], [24]. In other words, Huffman coding uses the table of frequency occurrence to derive the input from processing a large number of symbols [23].…”

Section: Huffman Coding Techniquementioning

confidence: 99%

“…This Huffman coding tends to cause the probability to fluctuate around. And need an exhaustive starch through the code work that make the storing of the lookup table to be larger than Arithmetic coding [23]. From the simulation results, the Arithmetic Coding has been chooses to be the Probability Distribution Equalization (PDE) due to the high reduction of the PAPR in the system [12].…”

Section: Papr Performance Using F-ofdm Without Block Coding Techniquementioning

confidence: 99%

PAPR Reduction Using Huffman and Arithmetic Coding Techniques in F-OFDM System

Idris¹,

Deros²,

Taib³

et al. 2018

Bulletin EEI

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Filtered orthogonal frequency division multiplexing (F-OFDM) was introduced to overcome the high side lobes in the OFDM system. Filtering is implemented in the system to reduce the out-of-band emission (OOBE) for the spectrum utilization and to meet the diversified expectation of the upcoming 5G networks. The main drawback in the system is the high peak to average ratio (PAPR). This paper investigates the method used in reducing the PAPR in the F-OFDM system. The proposed method using the block coding technique to overcome the problem of high PAPR are the Arithmetic coding and Huffman coding. This research evaluates the performance of F-OFDM system based on the PAPR values. From the simulation results, the PAPR reduction of the Arithmetic coding is 8.9% lower, while the Huffman Coding is 6.7% lower in the F-OFDM system. The results prove that the Arithmetic Coding will out-perform the Huffman coding in the F-OFDM system.

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A low-complexity modified SLM with new phase sequences for PAPR reduction in OFDM system

Cited by 9 publications

References 11 publications

Optimized Signal Distortion for PAPR Reduction of OFDM Signals With IFFT/FFT Complexity Via ADMM Approaches

Optimized Signal Distortion for PAPR Reduction of OFDM Signals With IFFT/FFT Complexity Via ADMM Approaches

Peak-to-average power ratio reduction in wavelet packet modulation Using Binary Phase Sequence.

PAPR Reduction Using Huffman and Arithmetic Coding Techniques in F-OFDM System

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