体全息存储系统中新调制编码技术的研究进展  

Study and Development of Modulation Code Technique in Digital Holographic Storage

作　　者：贾克斌[1] 敦书波[1] 杨大鹏[1] 陶世荃 吴会丛[3] 

机构地区：[1]北京工业大学电子信息与控制工程学院,北京100022 [2]北京工业大学应用数理学院,北京100022 [3]河北科技大学信息科学与工程学院,石家庄050051

出　　处：《科学技术与工程》2003年第4期384-385,共2页Science Technology and Engineering

基　　金：国家973计划(G19990330)

摘　　要：体全息存储系统的噪声特点决定了必然要引入纠错编码和调制编码技术。提出了一种具有新的编码结构的改进调制码:调制-阵列码;同时提出了与其相适应的软判决度量方法。在此基础之上综合调制码探测、软判决,阵列码纠错和Turbo码译码原理,形成了一种新的迭代译码算法。初步实验结果表明:在信道信噪比较低且有起伏,信道噪声参数不好统计的情况下,它能充分利用输入信号所包含的信息,获得较好的解码结果。To effectively reduce the influence of noise in the digital holographic storage system,a novel code having modi-fied coding structure,Modulation-Array(MA)code,is proposed. Meanwhile, a new soft-decision metric is proposed. Accord-ing to its character, a new iterative decoding algorithm,which integrates principles of modulation code detect ion, soft-deci-sion, array code error-correction and Turbo code decoding, is also designed. Experimental results show that when the signal-to-noise ratio in the channel is low and varying, and the noise parameters are difficult to calculate, this MA code can exploit theinformation contained in the input data effectively and the decoding results are satisfied.

关 键 词：体全息存储系统 调制编码 调制码 阵列码 TURBO码 迭代译码 误码率 

分 类 号：TN911.22[电子电信—通信与信息系统]