In this article, nonbinary ldpc codes are preferred than binary. A radix4 quasicyclic shift network qsn for reconfigurable qcldpc decoders is presented in this paper. This paper presents an efficient architecture for implementing nonbinary ldpc decoders. Matrix merging scheme and efficient decoding techniques. To ease these problems, highlevel synthesis hls tools have been introduced which abstract away the rtl architecture description from the designer. A configurable output synchronous fifo is used to store the output for the next block. We also propose a highly efficient algorithm to convert the data structure. Low latency check node unit architecture for nonbinary ldpc decoding. This paper proposes a modified minmax algorithm mmma for nonbinary quasicyclic lowdensity paritycheck nbqcldpc codes and an efficient parallel blocklayered decoder architecture corresponding to the algorithm on a graphics processing unit gpu platform. Memory efficient ems decoding for nonbinary ldpc codes. Efficient decoder design for nonbinary quasicyclic ldpc codes. Efficient configurable decoder architecture for nonbinary. We optimize the data structures of the messages used in the decoding process such that both the read and write processes can be performed in a highly parallel manner by the gpus. Cavallaro, a flexible ldpcturbo decoder architecture, journal of signal processing systems.
Section 3 gives an overview of flexible ldpc decoders classifying them on. The algorithmic and architectural details can be found in. Congurable highthroughput decoder architecture for quasi. Low latency check node unit architecture for nonbinary. In general, the following equation can be used for encoding.
T1 a networkefficient nonbinary qcldpc decoder architecture. Highthroughput fpgabased qcldpc decoder architecture. Design and analysis of nonbinary ldpccpm system for hybrid. A networkefficient nonbinary qcldpc decoder architecture zhang c. Strategies for highthroughput fpgabased qcldpc decoder. The code was developed by the authors for research purpose. This architecture is a partialparallel architecture by employing z check node processing cnp units. We propose without loss of generality strategies to achieve a highthroughput fpgabased architecture for a qcldpc code based on a circulant1 identity matrix construction. The decoder architecture at hand is affected by two types of. A networkefficient nonbinary qcldpc decoder architecture. A multistandard efficient columnlayered ldpc decoder for software defined radio on gpus. A free powerpoint ppt presentation displayed as a flash slide show on id. In proceedings ieee workshop on signal processing systems pp.
This paper presents a blocklayered decoder architecture and efficient design techniques for quasicyclic nonbinary lowdensity paritycheck qcnbldpc codes. To validate the architecture, a decoder for the ieee 802. Recently, softdecision binary and nonbinary ldpc codes with an outer. Highthroughput fpgabased qcldpc decoder architecture swapnil mhaske, hojin kee y, tai ly, ahsan aziz, predrag spasojevic wireless information network laboratory, rutgers university, new brunswick, nj, usa.
Award in 2011, the intel early career faculty honor program award in 20, the david j. An efficient blocklayered scheme and a data structure suitable for parallel computing are proposed to perform decoding on the gpu. First, a novel decoding algorithm is proposed to eliminate the multiplications over galois. Codedesign for efficient pipelined layered ldpc decoders with.
Chapter 3 explains software requirements like xilinx, fpga architecture. Based on a minmax decoding algorithm, an efficient blocklayered decoder architecture for qcnbldpc codes is proposed for fast decoder convergence. Efficient check node processing architectures for non. Design and analysis of nonbinary ldpc codes for arbitrary discretememoryless channels amir bennatan, student member, ieee, david burshtein, senior member, ieee abstract we present an analysis, under iterative decoding, of coset ldpc codes over gfq, designed for use over arbitrary. This detailed explanation of the algorithm can be found from the following papers you can find them in doc directory. Software simulation of average iterations for various matrices. The published solutions are evaluated at two levels of architectural design. The wireless sensor network wsn is a network information system integrating. In this project you can find the source code referring to the fftspa nonbinary ldpc decoder for vivado hls published in fpl 2015 paper from low architectural expertise up to highthroughput nonbinary ldpc decoders. In this work we explore the design space of a nonbinary gfq lowdensity paritycheck ldpc decoder using vivado hls and compare it.
Keshab parhi electrical and computer engineering zhang, chuan, and keshab k. Access wimax, wireless local area network wlan and. Efficient hardware implementations of ldpc decoders, through. This proposal reduces the number of messages exchanged between check node and variable node as well as the hardware complexity. Pdf efficient decoder design for highthroughput ldpc decoding. Tam abstractthis paper propose a decoder architecture for lowdensity paritycheck convolutional code ldpccc. A novel decoding approach for nonbinary ldpc codes 5 value. Efficient check node processing architectures for nonbinary ldpc decoding using power representation. If you decide to participate, a new browser tab will open so you can complete the survey after you have completed your visit to this website. In this paper, a lowcomplexity vlsi architecture for nonbinary ldpc decoders is presented. Nonbinary ldpc codes are effective in combating burst errors. Ieee vlsi titles 2012 field programmable gate array. In the qcldpc codes, a highthroughput multimode qcldpc decoder architecture for wireless gigabit communication sabooh ajaz.
Jie huang principle software engineer fortinet linkedin. For nonbinary codes, the ones in parity check matrix are replaced by nonzero elements in gfq. Qcldpc codes, which are composed of submatrices, enable to implement the block parallel layered decoding architecture. Comparison results with the stateoftheart designs show. In error correction coding, nonbinary ldpc codes are the best ones.
The investigation begins with presentation of four algebraic constructions of rsbased nonbinary quasicyclic qc ldpc codes. The decoder architecture for a special class of nonbinary qcldpc codes will be illustrated in section iv. Ppt application of nonbinary ldpc codes powerpoint. For each variable node j inside the current horizontal layer, messages l pij that correspond to a particular check equation i.
We present a novel representation of the paritycheck matrix pcm providing a multifold throughput gain. A complexity reduction technique is described to reduce the total gate count at each stage in addition to the fact that radix4 logarithmic barrel shifter naturally offers less number of stages compared to radix2. In this paper, we describe a congurable highthroughput qcldpc decoder architecture based on layered message passing 10. Using the irqc algorithm, a check matrix without short loops was constructed. Highthroughput layered ldpc decoding architecture request pdf. A fully parallel nonbinary ldpc decoder with finegrained dynamic. Parhi, a networkefficient nonbinary qcldpc decoder. Splitting of the node processing algorithm enables us to achieve pipelining of blocks and hence layers. Qcldpc codes are a class of structured ldpc codes that are typically employed in. While this scheme is mathematically equivalent to the conventional sumproduct decoder, logdomain decoding has advantages in terms of implementation, computational complexity and numerical stability. Professor predrag spasojevic wireless data tra c is expected to increase by a fold by the year 2020 with more than 50 billion devices connected to. In this paper, an x86 multicore nbldpc decoder implementation is provided.
Section iii introduces the opencl programming model. Highthroughput fftspa decoder implementation for non. Strategies for highthroughput fpgabased qcldpc decoder architecture swapnil mhaske, hojin kee y, tai ly, ahsan aziz, predrag spasojevic wireless information network laboratory, rutgers university, new brunswick, nj, usa. By exploiting the intrinsic shifting and symmetry properties of nonbinary quasicyclic ldpc qcldpc codes, significant reduction of memory size and routing complexity can be achieved. In this paper, we propose a multilayer parallel decoding algorithm and vlsi architecture for high throughput ldpc decoding. Chen, an efficient layered decoding architecture for nonbinary qcldpc codes, ieee trans. N2 nonbinary lowdensity paritycheck ldpc codes are of great interest due to their better performance cover binary ones when the code length is moderate. The proposed ldpc decoder architecture is shown in fig.
Cavallaro, vlsi architecture for layered decoding of qcldpc codes with high circulant weight, ieee transactions on very large scale integration vlsi, 2012. Energy efficient decoder design for nonbinary ldpc codes. Efficient parallel blocklayered nonbinary quasicyclic. Logdomain decoding of ldpc codes over semantic scholar. A novel decoding approach for nonbinary ldpc codes in. We would like to ask you for a moment of your time to fill in a short questionnaire, at the end of your visit. Since the first ldpc decoder chip was proposed in 4, many researchers have been working on numerous design techniques to simplify the ldpc decoder architecture and to increase decoder throughput based on a specific parity check matrix 510. Vlsi architecture for layered decoding of qcldpc codes. While binary ldpc codes have shown great performance, nonbinary ldpc codes have empirically shown even better performance, especially for small codeword lengths. Cyclic qc 9 based matrix construction methods are widely used.
We are always looking for ways to improve customer experience on. This paper investigates the potential of nonbinary ldpc codes to replace widely used reedsolomon rs codes for applications in communication and storage systems for combating mixed types of noise and interferences. As a case study, we describe a doublelayer parallel decoder architecture for ieee 802. Efficient decoder design for nonbinary quasicyclic ldpc. Efficient high throughput decoding architecture for nonbinary ldpc. This decoder that implements the fftspa algorithm provides a throughput improvement of about 1. Reduced complexity nonbinary ldpc decoder by kh100 issuu.
These unique features lead to two networkefficient decoder architectures for classi and classii nonbinary qcldpc codes, respectively. This paper presents an efficient layered decoder architecture for nonbinary quasicyclic qc ldpc codes using the proposed barrelshifterbased permutation network and minimum value filter which. However, the cost of decoder implementation for these ldpc codes is. This paper addresses decoder design for nonbinary quasicyclic lowdensity paritycheck qcldpc codes. Implementation the encoder through dense generation matrix shall result in large complexity. Our architecture adds a level of parallelism to the reference architecture of studer et al. In this work, we propose an efficient quasicyclic ldpc qcldpc decoder simulator which runs on graphics processing units gpus. An efficient layered decoding architecture for nonbinary. An efficient radix4 quasicyclic shift network for qc. Highthroughput fpga qcldpc decoder architecture for 5g wireless by swapnil mhaske thesis director. Furthermore, the srnbased qcldpc decoder architecture. These unique features lead to two networkefficient decoder architectures for classi and classii nonbinary qc ldpc codes, respectively.
Design of a multimode qcldpc decoder based on shift. Lin j, yan z efficient shuffled decoder architecture for nonbinary quasicyclic ldpc codes. Parallel blocklayered nonbinary qcldpc decoding on gpu. Liu et al design of a multimode qcldpc decoder based on srn 735 table i system parameters ofieee 802. Design and analysis of nonbinary ldpc codes for arbitrary. It off ers an automated and systematic compilation flow. This is a cudabased software implementation of ldpc decoding algorithm. Highthroughput fpga qcldpc decoder architecture for 5g. Thus, the memory requirement and the wiring congestion is decreased, which increases the throughput of the decoder with a negli. A networkefficient nonbinary qc ldpc decoder architecture. In this paper, we present a gpu implementation of a nonbinary ldpc decoder.