OFDMReception

主要研究无线通信系统中，调制信号的载波同步问题，利用锁相环技术实现同步的matlab仿真(This paper mainly studies the carrier synchronization of modulated signal in wireless communication system, and realizes the MATLAB simulation of synchronization by using phase-locked loop technology.)

光纤通信系统中的相干光仿真，包括数字信号处理的全部过程和光纤信道的建模，针对16QAM的调制格式，带有Nyquist信号生成(Coherent light simulation in optical fiber communication system, including the whole process of digital signal processing and the modeling of optical fiber channel)

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.)

说明：  本程序代码包含了 SC SCL BP SCAN和SSC译码算法，以及各种编码算法GA，BA....*** 编程语言风格为C++，研究polar的和我一样渣渣的研一萌新点进来have a look 感谢大佬pan jianpeng ，感谢共享源码(This program code includes SC SCL BP SCAN and SCC decoding algorithm, as well as various coding algorithms GA, BA... *** Programming language style is C++, research polar and slag like me have a look Thank you pan jianpeng, thank you for sharing the source code)

说明：  TD-SCDMA物理层原理，了解物理层技术，了解信道编码的基本原理。(TD-SCDMA Physical Layer Principle)

给任意IP地址发送一个欺骗icmp包,发送方的IP地址和MAC地址可以随意填写(To deceive any IP address to send a icmp packet, the sender' s IP address and MAC address can be free to fill)

ANSYS里的数据导入MATLAB，用于ANSYS与MATLAB交换数据。(The data in ANSYS is imported into MATLAB)

说明：  频谱感知，生成采样频率，进行能量检测，采用matlab算法(Spectrum sensing, generation of sampling frequency, energy detection, using matlab algorithm)

Two different types of measurement matrices: predefined and random measurement matrices were studied and tested using MATLAB. The speech signal was reconstructed without losing important information in order to achieve an increase in the data rates. After multiple simulations

带语音识别的SIP-HMP程序, 可以实现ASR和TTS(sip hmp asr tts demo)