Viterbi编码解码算法，C源码，有仿真。

SIMD指令函数包，对速度有要求的朋友赶快下，里面有FFT函数，比普通指令要快接近4倍。可用在GPS的数据密集运算中，可以达到实时运行。-SIMD instruction function, package, asked a friend of the speed quickly, the inside FFT function, than the average close to 4 times faster instruction. Can be used in GPS, data-inte

Package viterbi-3.0.1.tar contains programs to implement Viterbi decoding of (de-facto standard) rate-1/2 and rate-1/3 m=7 convolutional codes. Package simd-viterbi-2.0.1.tar contains programs to implement Viterbi decoders for r=1/2 k=7 and k=9 codes

GNSS软件接收机代码，在GNURadio的基础上写了信号处理以及流图（用C++），支持SIMD以及GPU加速，关键计算都使用自己写的专用库实现，在硬件上支持GN3S V2、RTLSDR、osmosdr等诸多设备，支持GPS L1C/A、L2，Galileo E1、E5a。(GNSS software receiver code, on the basis of GNURadio, wrote signal processing and flow chart (using C++), suppo