qpsk_dsp_code

11.txt为产生信道冲激响应的源码， 22.txt为各种OFDM信道估计算法的源码(11.txt for producing channel impulse response of the source, 22.txt for a variety of OFDM channel estimation algorithm for the source)

说明：  基于次优贝叶斯估计的非线形非高斯条件下的粒子滤波器的MATELAB仿真(based Bayesian estimation of non-linear non-Gaussian under the conditions of the particle filter simulation MATELAB)

说明：  卡尔曼滤波，对一个做匀加速直线运动的目标进行跟踪，跟踪效果较好(Kalman filtering, do a linear motion with constant acceleration target tracking, track better)

代码为实现EM算法进行ofdm调制信号进行信道估计的仿真代码(source codes simulate the channel estimation using em algorithm)

前后向平滑算法：算法的原理很简单，以五点三次平滑为例。取相邻的5个数据点，可以拟合出一条3次曲线来，然后用3次曲线上相应的位置的数据值作为滤波后结果。简单的说就是 Savitzky-Golay 滤波器 。只不过Savitzky-Golay 滤波器并不特殊考虑边界的几个数据点，而这个算法还特意把边上的几个点的数据拟合结果给推导了出来。(Before and after the smoothing algorithm: the principle of the algorithm is very simple, to 5.3 times smooth as an example. Take the adjacent five data points, you can fit out a curve 3 times, and then use the corresponding position on the third time the data value as the filtered results. Simply said is the Savitzky-Golay filter. However, the Savitzky-Golay filter does not specifically consider several data points of the boundary, and this algorithm also specifically to the edge of a few points of the data fitting results derived.)

求阵列天线方向图，矩形栅格点平面阵方向图。(Array antenna pattern)

说明：  用HFSS仿真的左手材料源文件，完整，唯一。(The left-hand material source file of HFSS simulation is complete and unique.)

利用MATLAB软件进行了雷达点目标的回波的仿真(Radar Point Target Echo Simulation)

说明：  求阵列天线方向图，矩形栅格点平面阵方向图。(Array antenna pattern)

关于FASTICA算法的完整应用程序，其中有图像版(FastICA algorithm on a complete application, which has the image version)