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通信课程设计 MATLAB下编程的 信号调制与解调相关程序等，希望与大家分享。(Communications curriculum design under MATLAB programming signal modulation and demodulation and other related procedures, I hope to share with you.)

说明：  Welch法功率谱密度 Psd自功率谱 是用改进的平均周期图法来求随机信号的自功率谱估计 采用信号重叠分段，加窗函数和fft算法等计算一个信号的自功率谱估计（PSD）

说明：  整理的关于FFT的matlab程序，所用matlab版本为2016b(The matlab program of FFT is arranged. The version of MATLAB is 2016b.)

Space-time trellis encoder/decoder for QPSK modulation 2 bits per second per Hertz

CDMA AT Commands Interface Specification

设计一种快跳频通信系统，仿真其中的序列和性能，并给出系统框图。(Design of a fast frequency-hopping communication systems, simulation and performance of the sequence, and gives the system diagram.)

多频混合信号，滤波器，最优化低通滤波，切比雪夫带通滤波，最优化高通滤波，matlab(Mixed multi-frequency signal, a filter, a low pass filter optimization, Chebyshev band-pass filter, high pass filter optimization, matlab)

精细积分法计算地震动时程, 使用精细积分法计算Elcentro南北分量地震动八层框架结构时程(Precise integration method)

说明：  自适应滤波的MATLAB实现（包括LMS，LRS、NLMS等算法(Adaptive Filtering MATLAB implementation (including the LMS, LRS, NLMS algorithm, etc.)

这是一个相对完整的OFDM通信系统的仿真设计，包括编码，调制，IFFT，上下变频，高斯信道建模，FFT，PAPR抑制，各种同步，解调和解码等模块，并统括系统性能的仿真验证了系统设计的可靠性。 (This is a relatively complete simulation of OFDM systems design, including coding, modulation, IFFT, up and down conversion, Gaussian channel model, FFT, PAPR suppression of synchronization, demodulation and decoding modules, and systems, including system performance simulation verifies the reliability of system design.)