Reduced Complexity Quasi-Cyclic LDPC Encoder for IEEE 802.11N

Mankar, Monica V.; Asutkar, G. M.; Dakhole, Pravin

doi:10.5121/vlsic.2016.7604

Cited by 4 publications

(5 citation statements)

References 11 publications

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“…Later, Spielman and Mackay found out that by decoding with beliefpropagation (BP) or the SPA, better system performance can be achieved in [15,16]. Owing to high performance, LDPC codes have been drawing great attention in developing communication systems, such as IEEE 802.16e [17] and IEEE 802.11n [18]. An efficient encoding method of IEEE 802.11n LDPC codes is applied in this study.…”

Section: Efficient Ldpc Encoding Methodsmentioning

confidence: 99%

Network coding schemes with efficient LDPC coded MIMO–NOMA in two‐way relay networks

et al. 2020

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The combination of non-orthogonal multiple access (NOMA) and multi-input multi-output (MIMO) approaches has been considered as assuring multiple access for the fifth generation technology. In this study, the performance of a 2 × 2 MIMO-NOMA system with low-density parity check (LDPC) codes is investigated. Redundancy with randomly interleaved differential encoding (R-RIDE) is proposed and applied to LDPC encoded messages by two users. LDPC decoding is done using the sum-product algorithm (SPA), which has two types of decoding methods, hard-decision and soft-decision. For hard-decision, bit-flipping decoder is used and for soft-decision, probability domain, log-domain, and simplified log-domain decoders are used. Bit error rate (BER) versus signal-to-noise ratio (SNR) in (dB) and average mutual information (AMI) in (bps/Hz) versus SNR (dB) are evaluated to compare the performance of the proposed and conventional LDPC schemes in NOMA and MIMO-NOMA systems. Simulation results show that both AMI and BER of the proposed LDPC-R-RIDE in MIMO-NOMA system greatly outperforms conventional LDPC coded schemes in NOMA and MIMO-NOMA systems. Moreover, the proposed R-RIDE-LDPC in MIMO-NOMA system outperforms the proposed scheme in the NOMA system. From the simulation results, LDPC-R-RIDE with simplified log-domain decoder has the best AMI result and BER performance compared with other decoding methods.

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Section: Efficient Ldpc Encoding Methodsmentioning

confidence: 99%

Network coding schemes with efficient LDPC coded MIMO–NOMA in two‐way relay networks

et al. 2020

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“…They were first presented by Gallager [8] in the early 1960s, and were scarcely considered in the three decades that followed due to its computational complexity and limited computational ability of the receiver at that time [9]. After they have taken considerable attention recently due to their Shannon limits performance with belief propagation decoding algorithm [10] they were rediscovered by MacKay and Neal in 1996 [11]. The ldpc codes are currently used for the channel coding on some communication standars.…”

Section: Coding and Transmission Technique 21 Ldpc Codesmentioning

confidence: 99%

“…The most popular outdoor applications of PLC technologies are smart grids (SG) and advanced meter reading (AMR). The attention paid to smart grid is rapidly increasing due to several reasons such as remote monitoring, measurement, control processes of conventional and renewable grids in a sustainable and reliable way [5][6][7][8][9][10][11][12][13][14][15][16][17]. The broadband (BB) indoor applications of the PLC technologies are predicted to offer a communication platform with a high data rate communication medium for homes and offices use [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A comparative simulation study of different decoding schemes in LDPC coded OFDM systems for NB-PLC channel

Maammar

Bri

Foshi

2019

IJEECS

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In this paper, we study the performance of Low density Parity Check (LDPC) coded orthogonal frequency-division multiplexing (COFDM) systems when they are applied on the short data block of a narrowband (NB) power line communications (PLC) channel. In the modelled system simulations have been performed using different code lengths. It is assumed that the channel has a multipath propagation with two different noise scenarios: AWGN background noise with and without the presence of impulsive noise. Performances of Various soft and hard decision LDPC decoder schemes such as belief propagation (BP), weighted bit flipping (WBF), improved weighted bit flipping (IWBF) and implementation-efficient reliability ratio based weighted bit flipping (IRRWBF) decoders were investigated. It has been shown for all simulations performed in PLC channel model showed that remarkable performance improvement can be achieved by using short-length LDPC codes. Especially, the improvements are striking when the BP decoding algorithms are employed on the receiver side.

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“…Another type of LDPC code called Quasi-Cyclic (QC-LDPC) code, it has an efficient performance, and it's used in modern wireless communication standards, as IEEE 802.11n, IEEE 802.11ac, and IEEE 802.16e [16]. Here efficient encoding used, where H-matrix used in the encoder instead of G-matrix as in [17].…”

Section: Ldpc Code For Ieee80211nmentioning

confidence: 99%

Performance Evaluation and Assessment of LDPC Codec over DVB-S2 and WLAN802.11n Applications

Noor¹,

Mohammed²

2019

IJCA

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Low-Density Parity-Check (LDPC) codes are higher coding gains, the performance of LDPC code are closed to the Shannon limit, this make the decoding very attractive to many applications in digital communication systems, like DVB-S2 and WLAN802.11n, in this work the performance of LDPC code evaluated in different block lengths, code rates and number of iterations and implemented in MatLab simulation. In this work, a random signal is generated and encoded by multiplying the information by a matrix in the encoder, the resulting codeword modulated using BPSK modulation, codeword transmitted over an AWGN channel. This process implemented over different Eb/N 0 values.

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Reduced Complexity Quasi-Cyclic LDPC Encoder for IEEE 802.11N

Abstract: In this paper, we present a low complexity Quasi-cyclic -low-density-parity-check (QC-LDPC)

Cited by 4 publications

References 11 publications

Network coding schemes with efficient LDPC coded MIMO–NOMA in two‐way relay networks

Network coding schemes with efficient LDPC coded MIMO–NOMA in two‐way relay networks

A comparative simulation study of different decoding schemes in LDPC coded OFDM systems for NB-PLC channel

Performance Evaluation and Assessment of LDPC Codec over DVB-S2 and WLAN802.11n Applications

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