As a drawback, however, the computational complexity of this algorithm depends exponentially on the length of the channel impulse response. In this paper, a new suboptimum receiver structure is presented contai
The Viterbi algorithm decision criteria regards 0 as the most confident 0 and 2nsdec –1 as the most confident 1. Data Types: char | string nsdec— Number of soft decision quantization bits integer in the range [1, 13] Number of soft decision quantization bits, specified as an integer in...
1),algorithm='viterbi')# 输出解码的隐含状态序列print(box_list)foriinrange(len(obervation_list))...
Convolutional encoding is used in almost all digital communication systems to get better gain in BER (Bit Error Rate), and all applications needs high throughput rate. The Viterbi algorithm is the solution in decoding process. The nonlinear and feedback nature of the Viterbi decoder makes its ...
事实上,它是Maximum likelihood decoding algorithm(最大似然译码算法)[21]的卷积码,也就是说,由解码器选择的输出总是能够给最大似然的对数似然函数。在一般情况下,维特比算法可以被看作是一个概率估计在有限状态马尔可夫过程中没有内存信道的背面(如果信号信道的概率分布,它是最大似然解码)。 采用维特比算法比较...
state information of the decoder for use in subsequent calls to this function. Repeated calls to this function can be useful if your data is partitioned into a series of vectors that you process within a loop. For workflows that require repeated calls to the Viterbi decoding algorithm, see...
3.Basing onViterbi algorithm,some strategies for the improvement are offered.提出一种算法,用来高效地完成训练语料的大量工作,并解决好训练语料的扩充问题,然后基于Viterbi算法提出一些改进之策,结合训练语料工作完成后的结果在二元模型基础上,采用不同规模的训练语料对同一规模的测试语料进行测试、比较与分析,并提出模...
simulation.TheprincipleofMLSEtechnologyandViterbialgorithm i8describedin chapter 2.It 8l&alyzes thetrunsferreddataandreseiveddataand presents the systemmodel.BecauseoftheISIinthechannel.theMLSE technology iS proposed toestimatethetransferreddata aecording tothestatisticsofreceived data.Chapter3 iSbasedOilthe...
K ey w ords:communication technology;s oft2decision;decoding;FPG A 0 引 言 Viterbi译码器[1,2]具有相当高的计算复杂度,已广泛应用于译码卷积码.Viterbi译码器的译码延时是可预测的,其复杂度也固定,而且能实现最优解码,所以该译码器特别适用于实时应用系统.针对Viterbi译码器的硬件实现方法和如何进一步提高其...
likelihood (ML) sequence detection, and it is an optimum decoding algorithm for convolutional codes. A published book written by S. B. Wicker, named “Error Control System for Digital Communication and Storage, Pretice Hall, 1995.” disclosed a Viterbi decoder for use in mobile communication ...