Tmaps

Calculating photonic bands with plane wave expansion method

排队论 经典 M/M/1程序 Queuing theory, the classical M/M/1 process(Queuing theory, the classical M/M/1 process)

根据FSK调制原理 在二进制频移键控中，幅度恒定不变的载波信号的频率随着输入码流的变化而切换（称为高音和低音，代表二进制的1和0）。来做实验 (According to the principle of FSK modulation in the binary frequency shift keying, the frequency of the carrier signal amplitude constant with the change of the input stream is switched (called treble and bass, representing a binary 1 and 0). Trequinsin)

这里面有两个程序，两个都是采用4QAM调制。不过个人觉得第一个更容易懂，因为写的很有条理。我改的那个程序就是根据这个来的。 不过在这里面有个问题就是信道系数只能是由高到低，大家可以试试，改成[0.227 0.46 0.688 0.46 0.227]这个是老师给我的仿真中常用的信道系数，这个成为归一化信道，就是系数平方和为1. 第二个程序没有涉及到信道系数，但是这个程序当中，在128个子载波中，前后有32个空载波，这个在OFDM中也是经常用的，这样可以降低误码率。 (And there are two programs, two are based on 4QAM modulation. But personally feel that the first is easier, because the writing is organized. I changed that procedure is based on the past. However, there is a problem in that there is only channel coefficients from high to low, we can try and change into [0.227 0.46 0.688 0.46 0.227] This is the teacher gave me the simulation channel coefficient commonly used, this became normalized channel, is coefficient of the square and is 1. The second program is not related to channel coefficients, but this program which, in the 128 sub-carriers, the before and after the 32 air carriers, the in OFDM is also often used, which can reduce the error rate.)

GPS_SDR:GPS软件接收机源码，包括从中频数据获取到捕获、跟踪、解码、定位和界面显示。(GPS_SDR: GPS software receiver source, including data acquisition from the IF to the acquisition, tracking, decoding, positioning, and screen displays.)

计算机MATLAB程序通过动画来实现辐射问题的可视化 (Computer Program Animation-Visualization Of Radiation Problems )

matlab5.0手册，主要供初学则使用(matlab5.0 manual is used primarily for beginner)

中频数字正交采样，并进行滤波，得出基带信号(IF quadrature sampling and filtering)

两种s变换反变换形式及一个简单的test程序，已自行测试过(two kinds of inverse s transform)

说明：  plotHHT为一个绘制信号希尔伯特谱的程序，主要为希尔伯特黄变换。(PlotHHT is a program for plotting Hilbert spectrum of signals, which is mainly Hilbert Huang transform.)