滤波器的设计，信号的抽样，频率变换，信号的幅频，信号的相频等-Filter design, signal sampling, frequency conversion, the signal amplitude and frequency, phase frequency signals, such as

在matlab GUI界面上实现对一个正弦信号进行抽样，量化，编码-Realization of a sinusoidal signal is sampled at the matlab GUI interface, quantization, coding

给定一个信号 a)画出低通信号的波形； b)画出抽样速率为 fs为 4HZ 的抽样序列 c)从抽样序列中恢复出原始信号 当抽样速率为 fs  1.5HZ ，画出恢复后的波形。 当抽样速率为 fs  1.5HZ ，画出恢复后的波形。-Given a signal a) Draw a low pass signal waveform b) Draw the sampling rate fs is sampling sequence 4HZ

2DPSK载波调制信号的调制解调与性能分析抽样判决及其程序源代码-Modulation and Demodulation of 2DPSK Carrier Modulation Signals and Sampling Decision and Its Program Source Code