本程序提供了无4环和6环的LDPC好码设计算法。 使用者对照程序前言中的参考文献，可以迅速理解并掌握无4环和6环的LDPC好码的设计技术。-This procedure provides a non-4 ring and 6 ring good LDPC code design algorithm. Foreword to the user control procedures of references, you can quickly understand and grasp the n

分步细讲解基2蝶形算法，尽量让你在最短的时间内掌握FFT算法的程序实现。(Step by step to explain the basic 2 butterfly algorithm, try to let you grasp the FFT algorithm in the shortest time.)