GPS信号产生、捕获、追踪全套程序

该程序能将GPS经度和纬度坐标转化为高斯平面坐标。(The program can transform the longitude and latitude into Gauss coordinate.)

说明：  3. 瑞利信道中的调制解调、信道估计： (1) 请推导出单径瑞利信道中的BPSK相干解调的理论误码率性能，并画出比特信噪比与误码率的关系曲线。 (2) 在单径瑞利信道中，请设计一种时分的导引辅助的信道估计方法，用Simulink进行仿真，测量BPSK的误码率性能，画出比特信噪比与误码率的关系曲线，并与理论误码率曲线进行对比。(3. Modulation demodulation and channel estimation in Rayleigh channel: (1) deduce the theoretical bit error rate performance of BPSK coherent demodulation in single-path Rayleigh channel, and draw the relationship curve between bit signal-to-noise ratio and bit error rate. (2) in single-path Rayleigh channel, please design a time-division guidance assisted channel estimation method, Simulink simulation, measure the bit error rate performance of BPSK, draw the relationship curve between bit SNR and bit error rate, and compare with the theoretical bit error rate curve.)

UWB的BPSK与PPM调制程序,用于超宽带中的BPSK调制与PPM调制的仿真与实现,(The BPSK and PPM modulation program of UWB is used in the simulation and realization of BPSK modulation and PPM modulation in UWB.)

设计一个巴特沃兹数字低通滤波器，其技术指标为：3dB带宽为0.2π，阻带截止频率为0.3π，通带纹波为1dB，阻带衰减大于30dB，采样间隔T=10ms。 1）采用冲激响应不变法； 2）采用双线性变换法设计； 3）采用FIR的窗函数（Hanning窗、Hamming窗或Blackman窗）设计。(A Butterworth digital low-pass filter is designed. Its technical specifications are: 3 dB bandwidth is 0.2 pi, stopband cut-off frequency is 0.3 pi, passband ripple is 1 dB, stopband attenuation is more than 30 dB, sampling interval T=10 Ms. 1) Impulse response invariance method is adopted. 2) Design by bilinear transformation method; 3) FIR window function (Hanning window, Hamming window or Blackman window) is used to design.)

MATLAB实现了HARQ重传，分析误码率和信噪比间的关系，并可以修改最大重传次数(MATLAB implements the retransmission of HARQ, analyzes the relationship between the bit error rate and the signal to noise ratio, and can modify the maximum retransmission times.)

计算两组数据的皮尔逊相关系数，取值位于-1到1之间，绝对值越大，线性相关性越好。(Calculate the Pearson correlation coefficient between the two sets of data)

说明：  利用PSO优化回声状态网络，内有解释，亲测可用(Optimizing the Echo State Network by PSO, with explanation, the pro-test is available)

CSP code，是一种有监督的空间频率滤波方法(CSP code, a supervision spatial frequency filtering method)

RC充电电路仿真模型，可以看到曲线变化，初学者可以参考(RC charging circuit simulation model, we can see that curve of change, learners can refer to)

说明：  利用遗传算法寻优，求函数 F (x) = x + 10cos (5x) + 7SiN (4x)的最小值(Genetic algorithm is used to find the minimum value of F (x) = x + 10cos (5x) + 7SiN (4x))