QPSK

dct变换离散余弦变换（Discrete Cosine Transform，简称DCT变换）是一种与傅立叶变换紧密相关的数学运算。在傅立叶级数展开式中，如果被展开的函数是实偶函数，那么其傅立叶级数中只包含余弦项，再将其离散化可导出余弦变换(Discrete Cosine Transform)

to play audio wave file with coding

该段程序描述了如何去估计多普勒频率变化率。参考文献为Morelli的《Doppler-rate estimation for digital burst transmission》( This section describes how to program the estimated Doppler frequency rate of change. References to Morelli s "Doppler-rate estimation for digital burst transmission")

包括了高教出版社出版的数学建模教材里部分习题的答案(including the Higher Education Publishing House of mathematical modeling teaching materials part of the answer Exercises)

code for leach in matlab

在matlab环境中，用来进行分类的算法(In the matlab environment, used for classification algorithms)

MATLAB code for root locus plot

编写了多重自适应算法，可以稍加修改用于信号处理中(The preparation of multiple adaptive algorithm, can be modified for signal processing)

数字调制就是把数字基带信号的频谱搬移到高频处，形成适合在信道中传输的带通信号。基本的数字调制方式有振幅键控（ASK）、频移键控（FSK）、绝对相移键控（PSK）、相对（差分）相移键控（DPSK）。在接收端可以采用想干解调或非相干解调还原数字基带信号。 (Digital modulation is the spectrum shifting to high frequency digital baseband signals, suitable for the formation of bandpass signal transmission in the channel. Digital modulation basic amplitude keying (ASK), frequency shift keying (FSK), the absolute phase shift keying (PSK), relative (differential) phase shift keying (DPSK). At the receiving end can be used to dry the demodulation or non coherent demodulating the digital baseband signal. )

系统辨识中参数辨识ARM模型 基于递推最小二乘法(ARM system identification parameter identification method based on recursive least squares model)