PAPR reduction performance in OFDM systems using channel coding techniques

Rajasekhar, Ch.; Rao, D. Srinivasa; Raghava, V. Yaswanth; Hanith, Datla

doi:10.1109/ecs.2014.6892651

Cited by 8 publications

(11 citation statements)

References 6 publications

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“…The result of curve fitting shows that all PAPR PDFs when using cross odd-bit QAM schemes follow a scaled Gaussian distribution of (9). √ (9) Where (p) represents PAPR as random variable measured in (dB), (µ) and ( ) represents the mean and variance of the distribution.…”

Section: Simulation Resultsmentioning

confidence: 99%

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Investigation on the PAPR performance of odd-bit QAM constellations for DFT spread OFDM systems

Sana

Saeed

Yaseen

2021

IJEECS

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<p>Adaptive quadrature amplitude modulation (QAM) is a crucial scheme that enables the modern communication systems to overcome the adverse effects of channel fluctuations and maintain an acceptable spectral efficiency. In order to enhance adaptive modulation even further, adoption of odd-bit QAM constellations alongside even constellations had been suggested to improve the transmission efficiency of adaptive QAM modulation. Hence, odd-bit QAM had been extensively studied, analyzed, and tested by many researchers for various patterns, sizes, and communication systems in terms of bit error rate (BER) and peak to average power ratio (PAPR). However, the PAPR performance of odd-bit QAM constellation with single carrier transmission systems adopted in the uplink of the 4G long term evolution (LTE) standards caught almost no research interest. In this paper, the PAPR performance of both cross and rectangular odd-bit QAM constellations are investigated for DFT-S-OFDM systems. Complementary cumulative distribution functions (CCDFs) and probability density functions (PDFs) curves for PAPR are also obtained. Finally, an equation for PAPR PDF is empirically derived for odd-bit cross QAM based DFT-S-OFDM. The results show that cross odd-bit QAM outperforms the rectangular odd-bit QAM in terms of PAPR by 1.02 dB for 8-QAM and 1.3 dB for 32-QAM. This proves that cross odd-bit QAM is a better choice in terms of PAPR for DFT-S-OFDM systems. </p>

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Section: Simulation Resultsmentioning

confidence: 99%

“…PAPR distribution for OFDM systems was calculated and derived based on the extreme value theory in [3] and [4]. The performance analysis of many PAPR reduction techniques for OFDM and SC-FDMA systems were presented in [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the PAPR performance of odd-bit QAM constellations for DFT spread OFDM systems

Sana

Saeed

Yaseen

2021

IJEECS

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“…The sum of the filtered sub-band is transmitted depending on the allocated frequency resources to improve the spectrum utilization [7], [13], [14]. The 5G system should be able to offer better services to different channel characteristics [9]. Besides that, the F-OFDM should also be able to reduce the out-of-band (OOB) leakage that tolerate to the time frequency misalignment and able to overcome the drawback of the system [7], [13].…”

Section: System Model 21 Filtered-orthogonal Frequency Division Multiplexing (F-ofdm)mentioning

confidence: 99%

“…The filtering will help to suppress the OOB leakage. The Finite Impulse Response (FIR) digital filter based on the windowing functional method was used in the F-OFDM to divides the bandwidth in the system into a number of sub-bands [9].…”

Section: Introductionmentioning

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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“…Access (F-OFDMA) Figure 1: Block Diagram of F-OFDMA Transceiver System [11] The F-OFDM system was previously proposed in order to overcome the drawbacks of OFDM since OFDM have a high sensitivity to the carrier frequency offset (CFO) mismatch which occurred between the user equipment. Figure 1 illustrates the block diagram of the F-OFDMA transceiver system.…”

Section: Filtered Orthogonal Frequency Division Multiplementioning

confidence: 99%

Arithmetic and Huffman Coding using Quasi-Cyclic Low Density Parity Check Techniques with F-OFDMA for 5G System

Idris

Amran

Idris

et al. 2018

IJET

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The rising demand of the future 5th generation (5G) wireless systems has led to the development of wireless communication technologies that can provide higher user capacity. Therefore, filtered orthogonal frequency division multiple access (F-OFDMA) was introduced to accommodate large number of users. F-OFDMA has the advantage over OFDM since it is capable of overcoming the high side lobes and increasing the spectrum utilization by eliminating the out-of-band emission which can degrade the system's performance. In this paper, a joint method between two block coding techniques (Arithmetic coding (AC) and Huffman Coding (HC)) with an error correcting code (Quasi-Cyclic Low Density Parity Check (QC-LDPC))was proposed. AC-QC-LDPC and HC-QC-LDPC schemes were compared in terms of BER performance. Based on the simulation results, AC-QC-LDPC technique has been proven to give the 44.75% BER improvement to the F-OFDMA system which outperforms the HC-QC-LDPC technique. It is clear from the results that Arithmetic coding always give better BER improvements compared to Huffman coding with QC-LDPC.

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PAPR reduction performance in OFDM systems using channel coding techniques

Cited by 8 publications

References 6 publications

Investigation on the PAPR performance of odd-bit QAM constellations for DFT spread OFDM systems

Investigation on the PAPR performance of odd-bit QAM constellations for DFT spread OFDM systems

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

Arithmetic and Huffman Coding using Quasi-Cyclic Low Density Parity Check Techniques with F-OFDMA for 5G System

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