RA 码及其在通信系统中的应用研究确良：重复累积码；简化译码算法；高斯估计；比特交织编码调制；光纤通 信；码率兼容码；Turbo 码交织器-RA Code and Its Application in Communication System does good: repeat accumulate codes simplify the decoding algorithm Gaussian estimation Bit-Interleaved Coded Modulation op

matlab通信系统仿真与建模；文件中包含4个m文件，分别对应4个物理应用例子，对于matlab初学者来说，很好。-matlab communication system simulation and modeling document contains 4 m files, corresponding to four physical application example, matlab for beginners, very good.

该matlab程序源码主要实现单个认知用户频谱感知敏捷性的最优化，其基本的感知环节采用能量检测法；在恒漏检准则下，感知敏捷性可以用平均的感知时间来衡量；达到平均感知时间的最小化，也就实现了感知敏捷性的最优化。-The matlab main program source code to realize the optimization of single user spectrum sensing agility, its basic perceived links using energy d