codes

基于BD-SVD分解的下行CoMP预编码算法仿真(Based on the BD-SVD decomposition of the downlink the CoMP pre-coding algorithm simulation)

杰理得蓝牙通讯程序，可用于蓝牙和FM音箱的开发。(Bluetooth Communicator)

说明：  此程序用matlab编码，可以生成随机骨料，适用于有限元分析。。。。(This program is progressed by matlab, which can generate the concretebone. It can be used in finte element analysis.)

说明：  在E.C.Levy的“光电振荡器建模”一文中，利用MATLAB函数编写了单回路OEO仿真程序。为了说明它的用途，我们生成图2，4，5，8和11。(The single-loop OEO simulation is written by using MATLAB functions)

ofdm仿真程序有关信道传输中的多径效应，多普勒频移，时延扩展(OFDM simulation program on the transmission channel of multi-path effects, Doppler frequency shift, delay spread)

Bluetooth Combat Robot Code in Assembly Language. Robot for Robowar

常用数字调制技术，包括BPSK，OQPSK，QPSK，MSK，GMSK，QAM等的调制解调仿真程序，并且包含AWGN及衰落信道下的仿真，对学习数字调制技术有较大帮助(Commonly used digital modulation techniques, including BPSK, OQPSK, QPSK, MSK, GMSK, QAM modulation and demodulation simulation program such and includes AWGN and fading channel simulation, the study of digital modulation techniques of great help)

采用QPSK调制方式实现OFDM，在simulink上搭建的仿真模块，可以很好的学习OFDM，验证通过。(Achieved using QPSK modulation OFDM, built on the simulink simulation module can be good learning OFDM. )

说明：  2. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请描述：自己用计算机产生的经典谱是正确的依据。(2. Regarding the doppler spectrum of the wireless channel, please answer the following questions: (1) in some wireless channels, doppler frequency shift will cause aliasing of the output signals of the wireless channel.Describe the various causes of aliasing; (2) there is a classic spectrum in the doppler spectrum in the wireless channel, please explain the mechanism of producing this spectrum shape; (3) please use Simulink tool to write code (s-function mode) to generate a single-path Rayleigh channel, whose doppler spectrum is the classical spectrum, in which the moving rate is 120km/h.And please describe: your own computer generated classical spectrum is the correct basis.)

viterbi decoder 2/3 rate