yuanchengxu

在实际的调谐解调电路中，采用的是非相干载波解调，本振信号与发射端的载波信号存在频率偏差和相位抖动，因而解调出来的模拟I、Q基带信号是带有载波误差的信号。这样的模拟基带信号即使采用定时准确的时钟进行取样判决，得到的数字信号也不是原来发射端的调制信号，误差的积累将导致抽样判决后的误码率增大，因此数字QPSK解调电路要对载波误差进行补偿，减少非相干载波解调带来的影响。(In the actual tuning and demodulating circuit, non-coherent carrier demodulation is adopted, and the frequency deviation and phase jitter of the local oscillator signal and the carrier signal of the transmitting end are present, and thus the demodulated analog I and Q baseband signals are signals with carrier error.)

很好的一个直接画史密斯圆图的源代码，且圆图的精度很高(a good painting directly Smith Chart of source code, which plans a round of high accuracy)

数字信号处理相关实验，包括求系统零极点，快速傅里叶变换，长序列卷积，FIR，IIR等。(Digital signal processing related experiments, including zero and pole of the system, fast Fourier transform, long sequence convolution, FIR, IIR and so on)

说明：  三相并网逆变器，有电压环和电流环双环控制，电流环参考值有功率控制(Three-phase grid-connected inverter with voltage control loop and current loop double loop, current loop power control reference values)

说明：  基带信号QPSK和16QAM的调制仿真，绘制误码率和误符号率的曲线(Base band signal QPSK and 16QAM modulation simulation, drawing error rate and error symbol rate curve.)

说明：  这个程序用于在图片中增加各种噪声，如高斯椒盐噪声, 加性或乘性等多种混合噪声，用于其它程序的测试。(This procedure is used to increase the variety of picture noise, such as salt and pepper Gaussian noise, additive or multiplicative noise, such as a mixture for testing other programs.)

matlab实现BuckBoost变换器(implemention of Buckboost in matlab)

bpsk 调制 使用的是matlab(bpsk modulation)

给出了一种以惯导系统为主，GPS和磁航向传感器为辅的多传感器组合导航系统，并对该组合导航 系统进行了仿真研究(Given the multi-sensor integrated navigation system, an inertial navigation system-based, supplemented by GPS and magnetic heading sensor and the integrated navigation system simulation study)

说明：  实现LTE系统级仿真，MIMO系统仿真，16QAM仿真(Implementare la simulazione a livello di sistema LTE)