danshuitingqishifan

数字基带传输系统的matlab仿真，用4种码型(Digital baseband transmission system matlab simulation, with four kinds of code-type)

说明：  对信号虚构三相，并进行瞬时无功功率分解，DQ分解(Fictitious three-phase signal and instantaneous reactive power decomposition, DQ decomposition)

在发射端发射大时宽、带宽信号，以提高信号的速度测量精度和速度分辨力，而在接收端，将宽脉冲信号压缩为窄脉冲，以提高雷达对目标的距离分辨精度和距离分辨力。(In order to improve the speed measurement accuracy and speed resolution of the signal at the transmitter, the wide pulse signal is compressed into a narrow pulse at the receiving end to improve the range resolution and range resolution of the radar.)

认知无线电中，采用循环特征检测的频谱检测算法matlab仿真程序(Using cyclic feature detection spectrum detection algorithm)

说明：  V5.2接口一致性测试规范，是V5.2接口测试的指导性文件，对V5开发人员有较大帮助(V5.2 interface conformance test specification, V5.2 interface test the guiding document, the right V5 developers have more help)

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)

Derive the theoretical 16QAM bit error rate (BER) with Gray coded constellation mapping in AWGN

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)

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.)

说明：  设备巡检操作系统 本程序是专门为某电厂开发的设备巡检系统，无需更改，便可以直接应用到实际中。 1、本程序可免费使用及修改。 2、本程序使用第三控件fastReport,Vclskin2.68,MsComm等组件(控件)。 有关使用问题请和本人联系。qq：3691202 (equipment Inspection procedures of the operating system specifically for the development of a power plant equipment inspection system without changes, it can be applied directly to the practice. One, the procedure is free to use and modification. 2, the procedures use the third component fastReport, Vclskin2.68, MsComm other components (controls). The use of links and I requested. Qq : 3691202)