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Efficient Soft-Decision Maximum-Likelihood Decoding of bch Code in the GNSS

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Journal of Harbin Institute of Technology(New Series) 2015年第1期22卷 54-58页

作者： Jinhai Sun Jinhai Li Haiyang Liu Feng Wang Yuepeng Yan Institute of microelectronics Chinese Academy of Sciences

Soft-decision decoding of bch code in the global navigation satellite system( GNSS) is investigated in order to improve the performance of traditional hard-decision decoding. Using the nice structural properties of bch code,a soft-decision decoding scheme is proposed. It is theoretically shown that the proposed scheme exactly performs maximum-likelihood( ML) decoding,which means the decoding performance is optimal. Moreover,an efficient implementation method of the proposed scheme is designed based on Viterbi algorithm. Simulation results show that the performance of the proposed soft-decision ML decoding scheme is significantly improved compared with the traditional hard-decision decoding method at the expense of moderate complexity increase.

关键词： GNSS bch codes soft-decision decoding maximum-like

AN ALGEBRAIC COMPLETE DECODING FOR DOUBLE-ERROR-CORRECTING BINARY bch CODES

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Journal of Electronics(China) 1984年第1期1卷 12-17页

作者：冯贵良 Shanghai Institute of Computer Technology

An algebraic complete decoding for double-error-correcting binary bch codes of primitive lengthis *** decoding is done more quickly than the step-by-step decoding devised by *** if an error pattern corresponding with syndromes s1 and s3 has weight 3,the decoding can find allerror patterns of weight 3 corresponding with these *** the same time,a discriminant for apolynomial of degree 3 over GF（2m）has three distinct roots in GF（2m）is also *** discrimi-nant is very important for complete decoding of triple-error-correcting binary bch codes.

关键词： AN ALGEBRAIC COMPLETE DECODING FOR DOUBLE-ERROR-CORRECTING BINARY bch CODES GF over bch

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闪存控制器中bch解码器的VLSI设计

华中科技大学学报（自然科学版） 2014年第1期42卷 93-97页

作者：郑朝霞丁明鹏钟建福李继承华中科技大学光学与电子信息学院湖北武汉430074 华中科技大学电子与信息工程系湖北武汉430074

为满足闪存控制器中bch解码器对速度和面积的要求,设计了一种高速小面积bch(8528,8192,24)解码器,其关键方程电路采用简化的RiBM算法,利用二进制bch码的特性简化关键方程电路结构和迭代轮数.使用关键方程电路的可折叠特性和逻辑资源复用... 详细信息

为满足闪存控制器中bch解码器对速度和面积的要求,设计了一种高速小面积bch(8528,8192,24)解码器,其关键方程电路采用简化的RiBM算法,利用二进制bch码的特性简化关键方程电路结构和迭代轮数.使用关键方程电路的可折叠特性和逻辑资源复用,对解码器架构进行了面积优化,结果显示:与传统iBM算法相比,电路的关键路径延时减小了约50%,与RiBM算法相比,关键方程迭代轮数减少了1/2,电路资源减少了约1/3;该系统架构能够在保证吞吐率的前提下减小约70%电路面积.

关键词： bch 码闪存存储器纠错码 Berlekamp-Massey算法折叠结构 error correction codes (ECC)

Statistical Recognition Method of Binary bch Code

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Communications and Network 2011年第1期3卷 17-22页

作者： Jiafeng Wang Yang Yue Jun Yao 不详

In this paper, a statistical recognition method of the binary bch code is proposed. The method is applied to both primitive and non-primitive binary bch code. The block length is first recognized based on the cyclic feature under the condition of the frame length known. And then candidate polynomials are achieved which meet the restrictions. Among the candidate polynomials, the most optimal polynomial is selected based on the minimum rule of the weights sum of the syndromes. Finally, the best polynomial was factorized to get the generator polynomial recognized. Simulation results show that the method has strong capability of anti-random bit error. Besides, the algorithm proposed is very simple, so it is very practical for hardware im-plementation.

关键词： Binary bch Code Blind Recognition Code Length Generator Polynomial

Performance Evaluation of OFDM Coding System Using Concatenated bch and LDPC Codes

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International Journal of Communications, Network and System Sciences 2017年第5期10卷 67-77页

作者： H. Gagan R. Manas N. G. Girish Kumar Department of Electronics and Communication Bangalore Institute of Technology Bengaluru India Bangalore Institute of Technology Bengaluru India

This paper establishes a resilient concatenated coding platform for Orthogonal Frequency Division Multiplexing (OFDM) with Quadrature Amplitude Modulation (QAM) over Additive White Gaussian Noise (AWGN) channel. At the Forward Error Correction (FEC) coding unit, our proposed concatenated coding scheme utilizes standard type of bch as external coding and LDPC as inner coding. In this scheme, Interleaver inclusion is seen as a catalyst to enhance the systems performance.

关键词： Concatenated Codes OFDM LDPC bch Interleaver

ON THE DIMENSION AND MINIMUM DISTANCE OF bch CODES OVER GF(q)

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Journal of Electronics(China) 1996年第3期13卷 216-221页

作者： Yue Dianwu Hu Zhengming(Dept. of Information Engineering, Beijing University of Posts & Telecommunications, Beijing 300088) Dept. of Information Engineering Beijing University of Posts & Telecommunications Beijing

In this paper, only narrow-sense primitive bch codes over GF(q) are considered. A formula, that can be used in many cases, is first presented for computing the dimension of bch codes. It improves the result given by MacWilliams and Sloane in 1977. A new method for finding the dimension of all types of bch codes is proposed. In second part, it is proved that the bch bound is the leader of some cyclotomic coset, and we guess that the minimum distance for any bch code is also the leader of some cyclotomic coset.

关键词： bch code Cyclotomic coset Dimension Minimum distance

Study on bch based Encoder and Decoder Approach for EM-MWD Communication System

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Study on BCH based Encoder and Decoder Approach for EM-MWD C...

H.261视频编码协议中bch前向纠错码的快速算法

第37届中国控制会议

作者： Cheng Zhang Haobin Dong Jian Ge Huan Liu Bingjie Bai Zhiwen Yuan Jun Zhu Haiyang Zhang School of Automation China University of Geosciences Hubei key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Institute of Geophysics & Geomatics China University of Geosciences

In practical applications of electromagnetic measurement while drilling（EM-MWD）,the signal-to-noise ratio（SNR）of receiver cannot always meet the requirements of reliable communication conditions due to the earth-attenuation,interfering signal from well site,*** to solve these problems,this paper presents a bch encoder and decoder technology based on BPSK for ***,the paper studies the relationship between bch encoding error performance and decoding method,source length and other factors through simulation;then,we obtain an optimal length of bch code for EM-MWD through analyzing the bit error performance of hard-decision decoding and soft-decision decoding with different lengths of bch *** results show that the proposed algorithm can reduce the bit error rate at a lower SNR,achieving a reliable communication condition when the SNR of a received signal is *** is demonstrated the effectiveness of the proposed bch encoder and decoder algorithm based on BPSK for EM-MWD.

关键词： EM-MWD system BPSK bch Optimized coding techniques

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武汉大学学报（信息科学版） 2002年第1期27卷 34-38页

作者：段汉文沈未名朱荣徐正全武汉大学多媒体网络通信工程湖北省重点实验室武汉市珞喻路129号430079

介绍了H .2 6 1视频编码协议中的bch(5 11,493)纠错码的编码和纠错原理 ,分析了采用软件实现经典算法效率低的原因 ,提出了纠正 2位随机错误的快速算法。与经典除法算法相比 ,快速算法使整机运算效率平均提高 2 0倍以上 ,能够满足实时... 详细信息

介绍了H .2 6 1视频编码协议中的bch(5 11,493)纠错码的编码和纠错原理 ,分析了采用软件实现经典算法效率低的原因 ,提出了纠正 2位随机错误的快速算法。与经典除法算法相比 ,快速算法使整机运算效率平均提高 2 0倍以上 ,能够满足实时视频通信系统的要求。本算法已成功运用在PSTN和ISDN可视电话中 ,而且这些快速算法的实现方法对其他运算量较大的纠错编码也有较高的参考价值。

关键词： H.261 视频编码协议 bch 纠错码快速算法视频通信

基于bch信道编码的FFH-OCDMA系统

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光电子．激光 2002年第11期13卷 1126-1136页

作者：吉建华吴琛范戈上海交通大学区域光纤通信网与新型光通信系统国家重点实验室上海200030

提出用bch信道编码的方案来降低色散和差拍噪声对快跳频光码分多址(FFH-OCDMA)系统性能的影响。分析了bch/FFH-OCDMA系统的色散效应,并将色散效应等效为功率衰减因子,得出同时考虑差拍噪声和色散后bch/FFH-OCDMA系统的误码率性能。结果... 详细信息

提出用bch信道编码的方案来降低色散和差拍噪声对快跳频光码分多址(FFH-OCDMA)系统性能的影响。分析了bch/FFH-OCDMA系统的色散效应,并将色散效应等效为功率衰减因子,得出同时考虑差拍噪声和色散后bch/FFH-OCDMA系统的误码率性能。结果表明,在相同的信息比特速率、切普间隔和有效波长数的情况下,bch信道编码能显著改善FFH-OCDMA系统的误码率性能。同时,由于单重合码的长度变短,降低了光纤光栅的制做难度。

关键词： bch 信道编码 FFH-OCDMA系统快跳频光码分多址差拍噪声色度色散单重合码