数字信号处理实验

GMSK信号 调制解调 参数BT=0.3(modulation and demodulation for GMSK(BT=0.3))

AX.25业余无线电数据通信协议通信的实现程序，包括打包和解包。(A program for packeting and unpacking AX.25 protocol.)

微软RIL白皮书。介绍了微软RIL(Radio Interface Layer)的架构和开发所必须具备的知识，包括简介、RIL Modem接口、开发环境、平台实现、测试，以及相关信息(Microsoft White Paper RIL. It introduced Microsoft RIL (Radio Interface Layer) architecture and the necessary knowledge for developer, including the Introduction, RIL Modem interface, development environment, platform, testing, and related information)

将压缩感知应用于基于训练序列的信道估计中，代码展示了压缩和估计过程。(Will be used in compressed sensing training sequence based channel estimation, the code shows the compression and estimation process.)

一个用于高阶调制单载波系统的低复杂度均衡算法，非常有用(a low-complexity equilization algorithm which can be applied in single-carrier systems wiht high order modulation)

手机中RF的基础知识，想学习RF知识的朋友有一定的帮助作用。 (phone RF the basic knowledge, to study RF knowledge friends to a certain extent help.)

说明：  matlab语音基因频率能量计算！一个非常有用的基音频率计算方法，一个小项目。(Matlab voice gene frequency energy calculation! A very useful pitch frequency calculation method, a small project.)

说明：  完整的rs+卷积编译码程序，可运行通过，并生成误码率曲线图(rs+conv encoding and decoding)

循环谱代码，应用于盲分离信号处理。非常适用于初学者，代码完整，仿真结果正确。(Cyclic spectrum code)

说明：  5. 在三条径的瑞利信道中，对于直接序列扩频： (1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。 (2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。 (3) 设时间已经同步，请设计DS-CDMA一种具体的频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。(5. In three-path Rayleigh channel, for direct sequence spread spectrum: (1) please design a specific code division navigation aided channel estimation method for ds-cdma, and adopt equal-beneficial combination and maximum ratio combination for receivers respectively.Simulink is used to simulate and draw the relationship curve between bit SNR and channel estimation mean square error and the relationship curve between bit SNR and bit error rate. (2) assuming that the frequency has been synchronized, please design a specific single-stop sliding correlation time synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and the acquisition probability curve. (3) if the time has been synchronized, please design a specific frequency synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and frequency synchronization error curve.)