dscodemotion

经典载波跟踪环costas环simulink建模仿真，采用QPSK调制，包含上下变频以及三种不同鉴相方式。(Classic costas loop carrier tracking loop simulink modeling and simulation, using QPSK modulation, including the upper and lower frequency, as well as phase three different ways.)

说明：  本文正是在研究WIMAX/802.16e协议和FMIPv6协议的基础之 上，提出了基于FMIPv6的WIMAX网络快速切换机制，该方案采用跨 层切换的思想，MAC层联合网络层同时进行切换，在链路尚未断开 之前即完成新转交地址(NCOA)获取等功能，从而加快了切换进程， 减小了切换时延和切换时的丢包率。在提出本切换机制的基础上，本 文在NSZ仿真平台上对所提出的切换方案做了系统性的性能仿真，通 过仿真结果验证了方案的可行性和优越性。 ( In this paper, IEEE802.16e standard is described at first. Then an introduction for the basic knowledge and research in MIPv6 and FMIPv6 protocol is given. A fast handover scheme of WiMAX network which based on FMIPv6 protocol is suggested, which implements the fast handover at IP layer associating with MAC layer at the same time. scheme minimizes handover latency by predicting and preparing This the impending handover in advance. Finally, simulation are carried out to evaluate the performance of this fast handover scheme. The result of the simulation shows that the fast handover scheme has good performance. )

锁相环相关知识，包含二阶 三阶 锁相环的介绍以及编程实例汇总(Phase-locked-related knowledge, presentation and programming examples included 2nd and 3rd order PLL summary)

利用matlab中的simulink仿真，建立了定轴齿轮和行星齿轮的的仿真模型(Using the simulink of matlab, the establishment of a fixed axis gear and planetary gear simulation model)

设计的软件锁相环的例子，自己写的，根据原理编的(PLL design example of software that he wrote, according to the principle for the)

用于计算射线声学声线,来找到所有声线中我想要的声线(to find the best acoustic line all )

IS95中的数据流伪随机序列的产生。用matlab中randn实现(IS95 data streams to be pseudo-random sequence generation. Achieved using randn in matlab)

：滤波 fs=400 采样频率,必须大于两倍基带信号最高频率 ts=1/fs 采样时间间隔 T=5 时间窗大小 t=0:ts:T (hf1=zeros(1,N) hf1(f<=B1&f>=-B1)=1 y1=hf1.*fftshift(y) figure subplot(211) plot(f,abs(fftshift(y))/N,f,hf1, r-- ) axis([-fs/2,fs/2,0,1.2]) title( 原信号频谱 ) xlabel( f /Hz ) subplot(212) plot(f,abs(y1)/N) title( 低通滤波，截止频率90Hz ) xlabel( f /Hz ))

汽车2 自由度模型，用simulink建的，希望对大家有帮助(Car 2 dof model, using simulink built, we want to help)

利用matlab实现了人脸检测的功能，主要是利用人脸颜色特征向量。(Matlab face detection function, face color feature vector.)