OFDM的MATHLAB仿真，计算误码率，误比特率，π/4qpsk调制-OFDM-MATHLAB simulation, the calculation error rate, bit error rate, π/4qpsk modulation

使用MATLAB仿真pi/4QPSK调制解调比较好的一篇文章，算法易懂，好实现。-Modulation and demodulation using MATLAB simulation pi/4QPSK good article, the algorithm easy to understand, to grasp.

pi4 qpsk的付费论文，讲述基本调制解调的分析，差分实现原理，非常有用(Pi4 QPSK Pay Paper, describes the analysis of basic modulation and demodulation and performance analysis in fading channels, differential realization principle, very useful)