对比了QPSK和OQPSK经过带通滤波器后的性能 对比了QPSK在高斯信道和瑞利信道下的传输性能-Comparison of QPSK and OQPSK, QPSK transmission performance under Gaussian channel and Rayleigh channel bandpass filter performance compared

基于matlab的iir巴特沃斯的带通滤波器设计，非常好用-Based on the matlab iir Butterworth bandpass filter design, very easy to use

低通滤波器，高通滤波器，带通滤波器。好用可以用的滤波器。课程设计的滤波器。(Low pass filter, high pass filter and bandpass filter. Good use of the filter that can be used. A filter for curriculum design.)

用matlab仿真零均值高斯白噪声通过低通带通滤波器前后特性，程序完善，结果与理论值非常接近(The zero mean white Gauss noise is simulated by MATLAB, and the program is perfect through the low pass bandpass filter. The result is very close to the theoretical value.)