viterbi 译码代码， 可以进行卷积码解码

实现了dvb-s的内码传输功能，即卷积编码和维特比译码-Achieved with the dvb-s code transmission function, that is, convolution coding and Viterbi

用c实现卷积算法，里面有详细说明，大家一起交流，-With c realize convolution algorithm, which is described in detail, to share with everyone, thank you

变采样和多相滤波器的实现。本程序实现了一个变采样程序，中间设计滤波器设计和插值抽取。其中滤波器设计用的是窗函数法，根据要求设计窗函数，得到窗函数的长度。接着是插值，滤波，抽取，得到最后变采样之后的波形文件、另外对比了用直接卷积和多相分解卷积两种方法最后的结果。 -Implementation of variable sampling and polyphase filter. This procedure implements a variable sampling procedures,

零延时卷积算法实现，基于fft变换。Efficient Convolution Without Latency by William G. Gardner-It is well known that a block FFT implementation of convolution is vastly more efficient than the direct form FIR filter. Unfortunately, block processing incurs signifi