One important task in decoding TBCC is to estimate the circular state based on the received soft bit values. Many efficient algorithms have been proposed for decoding TBCC. Among them the wraparound Viterbi alg
Viterbi algorithm HMM(隐马尔可夫模型)是用来描述隐含未知参数的统计模型,是一个关于时序的概率模型,它描述了一个由隐藏的马尔可夫链生成状态序列,再由状态序列生成观测序列的过程。其中,状态之间的转换以及观测序列和状态序列之间都存在一定的概率关系。 任何一个HMM都可以通过下列五元组来描述: :param obs:观测序列 ...
Abstrucf-The Viterbi algorithm (VA) is a recursive optimal solution to the problem of estimating the state sequence of a discretetime finite-state Markov process observed in memoryless noise. Many problems in areas such as digital communications can be cast in this form. This paper gives a tuto...
文章目录 1、时序模型 2、一些时序模型 3、HMM的介绍 Hidden Markov Model 4、HMM的应用举例 4.1 仍不均匀硬币 4.2 词性标注 4.3 语音识别 5、HMM的参数 6、 Two major tasks 7、 HMM的inference问题 7.1 Naive approach 7.2 Viterbi: 本质是一个动态规划的算法 8、F/B Algorithm fo... ...
algorithm,itmayobtainaquickerspeedandsmallerelectriccircuitscaleintroducingparallelschemeandwith FPGAasthehardwarecarrier. Keywords:Viterbi;MLSequenceDetector;FPGA 0引言 当信号无记忆时基于逐个符号检测器在最小符号错误 概率意义上是最佳的 [1][2] ; 但发送信号有记忆时即在连 续信号间隔内发送信号的观测值是互...
列表 Viterbi 译码算法及其应用
Verilog/FPGA Efficient Viterbi Decoding Algorithm. Overview The Viterbi algorithm is renowned as a maximum likelihood (ML) decoding technique for convolutional codes. The path memory unit in an (n,k,m) Viterbi Decoder is responsible for keeping track of the information bits associated with the surv...
showthatthenewalgorithmimprovesthedecodingefficiencyandreducesthememoryspaceconsumption. Keywords:Coding;Tail-bitingcodes;Tail-bitingtrellis;MaximalLikelihood(ML)decoding;Bidirectional searchingalgorithm 1引言 咬尾卷积编码是一种非常有效的卷积码编码方 2012-09-19 收到,2012-11-02 改回 ...
【摘要】在Viterbi算法中引入软值进行修正之后的算法称作SOVA算法(SoftOutputViterbiAlgorithm)。SOVA算法在Viterbi算法的基础上,路径量度引入了比特先验信息,对每位译码比特以后验概率似然比的形式提供软输出,因而可提供更高的译码性能。特别,SOVA算法可用于级联码的迭代译码,采用Tuobo原理使不同分量码之间交换软信息,从而...
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 ...