Exercise3

本程序是围长为8的QC-LDPC码设计，包括了4、6、8环的检测(This program is the girth of 8 QC-LDPC code design, including the detection of 4,6,8 ring)

大家都为了学习，学习，在学习，努力，认真学习才是王道，希望有用( If you hadn’t told me about your birthday party tonight, If you hadn’t told me about your birthday party tonight。)

本次实验是无线楼宇数据传输仿真，即在楼内实现点对点的无线数据通信，需要获得的关键是两点之间的距离和楼层衰减。通过了解914M的楼宇通信特性，建立楼宇数据通信系统的仿真模型，采用无线收发芯片NRF905,实现楼宇内的数据通信仿真分析。 (this experiment is building wireless data transmission simulation, in the building of peer-to-peer wireless data communications, need, the key is the distance between two points and the floor attenuation. 914 M by understanding the communication characteristics of the buildings, the establishment of building data communications system simulation models, adoption of wireless transceiver chip NRF905 achieve buildings on the simulation analysis of data communications.)

matlab去除信号直流分量代码，可用来处理GPR数据(DC component of the signal is removed matlab code used to process the data GPR)

vc++6.0调用matlab的函数，画正弦曲线，比较详细的源码。(vc++6.0 to call matlab function, draw a sine curve, the more detailed source.)

一些典型的DSP程序，对初学者比较有帮助，主要结合Digital Signal Processing——A Computer-based（电子工业出版社）一书课后题目编写。 (Some typical DSP program, the more help for beginners, mainly with Digital Signal Processing——A Computer-based. )

基于DWT的音频水印算法,采用小波变换，阿诺德置换实现水印的嵌入和提取。(Audio watermarking algorithm based on Wavelet Transform)

In order to minimize power losses caused by high current and improve the voltage profile in the network distribution, the introduction of dispersed generations also called productions decentralized in distribution network (DG) plays an important role. The installation of DGs directly affects the power requested or purchased. The sizing and placement of DGs in the system must be optimal because a wrong choice has a negative impact on the system behavior. To solve this combinatorial problem, an algorithm known as Firefly algorithm is proposed in this paper. This is a meta-heuristic algorithm inspired by the behavior of fireflies flashing. The main objective of firefly flash is to act as a signaling system to attract other fireflies. Networks tested IEEE69-bus and IEEE33-bus are used to evaluate the effectiveness of this method. The results are compared with those obtained by genetic algorithm (GA) to IEEE69-bus, and Shuffled frog leaping algorithm (SFLA) for IEEE 33-bus.

基于射线模型的浅海水声信道的仿真，采用解方程组算法得出本征路径数N，考虑多径和多普勒效应，并基于此加以自适应均衡技术进行均衡。(Ray simulation model of shallow water acoustic channel based on the use of solutions of equations or algorithms intrinsic number of paths N, consider multipath and Doppler effect, and based on this adaptive equalization techniques to be balanced.)

RLS和LMS消噪对比，供初学者来学习。。。。。。。。。(RLS and LMS eliminate the noise contrast)