dct_nnc

Generador de señ ales Seno y Coseno

奇异谱分析是近年来兴起的一种研究非线性时间序列数据的强大的方法。它根据所观测到的时间序列构造出轨迹矩阵，并对轨迹矩阵进行分解、重构，从而提取出代表原时间序列不同成分的信号，如长期趋势信号、周期信号、噪声信号等，从而对时间序列的结构进行分析，并可进一步预测。(Singular spectrum analysis is a powerful method to study nonlinear time series data in recent years. According to the time sequence structure of the observed path matrix, and the trajectory matrix is decomposed and reconstructed, thus extracting the signal representative of the original time series of different components, such as the long term trend signal and periodic signal and noise signal, through analyzing the structure of the time series, and further predict.)

程序的内容包括信号的DFT及IDFT处理以及数字滤波器的设计。相关的参考资料也包含在其中。(Contents of the program including the signal DFT and IDFT processing and digital filter design. Related reference information is also included.)

This code is related to the course Digital Communications. It makes a simple communication system which uses AWGN and QPSK

说明：  Turbo码的BCJR 算法 将通过观察离散无记忆信道(DMC) 中的M arkov 信源的接收序列, 经过计算, 给出每符号(状态) 最小 差错概率的符号(状态) 序列。(Turbo Codes BCJR algorithm by observing without discrete memory accesses (DMC), M arkov source reception sequence, calculated, given every sign (state), the smallest error probability of symbols (state) sequence.)

1、试设计串连校正装置，在同一窗口下分别绘制出校正前后的频域响应曲线，阶跃响应曲线，判断系统校正前后的稳定性； 2、设计串连校正装置，在同一窗口下绘制出校正前后的波特图进行验证，并在同一窗口下绘制校正前后系统的奈奎斯特图； 3、设计串联滞后超前校正装置，绘制出校正前后系统的伯德图； 4、设计串联校正装置使校正后的闭环系统的主导极点； 5、设计串联校正装置，维持原系统的闭环主导极点基本不变； 6、设计状态反馈阵。(And try to design concatenation correction device, were drawn in the same window, the frequency response curve before and after correction, the stability of the step response curve, determine the system before and after correction design concatenation correction device, drawn in the same window Bode plots before and after a correction to verify, before and after correction system Nyquist diagram drawn in the same window 3 design series lag the leading correction device, drawn before and after correction system Bode plot design series correction The closed-loop system in the device so that the corrected the dominant pole design series correction device to maintain the original system closed-loop dominant pole is essentially the same 6, the design state feedback matrix.)

SAR range-poppler algorithm

这是用matlab编写的一个kalman滤波器，数字信号实验维纳滤波，估计AR模型参数(using Matlab is prepared by a Kalman filter, digital signal experimental Wiener filtering, AR model parameters estimated)

QPSK system simulation not working

使用matlab编程进行工程计算如解线性方程组或者进行数值计算的方法(the use of matlab to accomplish engineering calculations such as solving linear equations or numerical calculation)