中文说明：搭建OFDM通信系统的框架，包含位置式PID算法、积分分离式PID，用于信号特征提取、信号消噪，验证可用，实现了对10个数字音的识别，阐述了负荷预测的应用研究。
English Description：
Build framework of OFDM communication system and contains position type PID algorithm, integral separation PID algorithm, used for signal feature extraction, signal denoising, verification can be used to realize the identification of 10 digital audio, and expounds the application of load forecasting.