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arXiv 2209.01360cs.ITmath.IT
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存在噪声和失真时双二进制信号Viterbi译码的出错率:理论与仿真

Error-rate in Viterbi decoding of a duobinary signal in presence of noise and distortions: theory and simulation

Henri Mertens, Marc Van Droogenbroeck

摘要:

1967年提出的维特比算法允许对部分响应码进行最大似然解码。本研究的重点是双二进制码,这是这个家庭的第一个成员,并已指定为数字部分的电视系统由国际组织推荐。到目前为止,出错率,这是性能的主要指标,已通过仿真评估。虽然存在理论上的界限,但是这些界限对于诸如广播(通过地面发射机、电缆网络或卫星)的信道是不令人满意的,该信道被噪声以及线性和非线性失真严重损害。分析方法,通过模拟验证,在这里提出,以评估的理论和准确值的出错率,在一系列的数值积分的形式,在基带或射频传输与四相调制(或AM/VSB电缆网络)和相干解调,在存在噪声和几个失真。这种方法可以在以后扩展到其他部分响应码,卷积码和它们的级联。

英文摘要:

The Viterbi algorithm, presented in 1967, allows a maximum likelihood decoding of partial response codes. This study focuses on the duobinary code which is the first member of this family and has been specified for the digital part of television systems recommended by International Organizations. Up to now the error-rate, which is the main criterion of the performance, has been evaluated by simulation. Although there exist theoretical bounds, these bounds are not satisfactory for a channel such as broadcasting (by terrestrial transmitters, cable networks or satellite) which is strongly impaired by noise, and linear and non-linear distortions. Analytical methods, verified by simulation, are presented here in order to evaluate the theoretical and exact values of the error-rate, in the form of series of numerical integrations, for a transmission in baseband or in radio-frequency with quadriphase modulation (or AM/VSB for cable networks) and coherent demodulation, in presence of noise and several distortions. This methodology can be later extended to other partial response codes, to convolutional codes and their concatenations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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