对信号进行频谱分析及滤波，线性调频脉冲压缩的Matlab程序,到达过程是的泊松过程，数据模型归一化，模态振动，使用大量的有限元法求解偏微分方程，LDPC码的完整的编译码。- The signal spectral analysis and filtering, LFM pulse compression of the Matlab program, Arrival process is a Poisson process, Normalized data model, modal vibrati

求解非线性振动方程 周期解的 谐波平衡法 通用计算程序 matlab编写(Solve the nonlinear vibration equation periodic solution harmonic balance method common calculation program matlab coded)