matlab编写的turbo码示例程序，用于通信系统的信道编解码仿真

几个有关通信系统的matlab程序，包含几个滤波器示例，如butter，cheby等，并有幅频特性，相频特性结果显示.-Some programs about communiction system,including some filters like butter cheby,amplitude-frequency characteristiand cphase-frequency characteristic added.