大作业

现代通信系统， 基于MATLAB的仿真，利用MATLAB学习通信原理(Contemporary Communication Systems Using MATLAB)

说明：  pi/4-dqpsk-1的verilog工程，实现电脑与FPGA自发自收(pi/4-dqpsk-1,It can realize the self receiving of computer and FPGA)

It is mainly used for ARQ simulation ,such as stop-and-wait

说明：  设计一个数字低通滤波器，来近似一个理想数字滤波器(Design a digital low-pass filter to approximate an ideal digital filter)

提供了用MATLAB进行数字图像处理、压缩感知、多种信号重建算法、多种熵编码的MATLAB代码。(The MATLAB codes for digital image processing, compression sensing, multiple signal reconstruction algorithms and multiple entropy coding are provided.)

中文RFC文档，不用翻译，对大家学习很有帮助！(Chinese RFC documents, without translation, the right to study very helpful!)

所有有关DOA估计的程序和代码，相当于一个完整的工具箱(All programs and codes related to DOA estimation are equivalent to a complete toolbox.)

说明：  自己实现的基于串口通讯发送短消息的低层协议JAVA代码，对于初学者有一定的参考和帮助价值，特意上传上来共享一下！(Their own realization of serial communication based on sending short messages JAVA code low-level agreement, for beginners there is a certain degree of reference and to help the value of deliberately upload up to share about!)

说明：  4. 试说明卷积编解码的工作原理： (1) 使用Simulink仿真卷积编码，并用Viterbi译码的方法进行解码，其中的编码、译码全部是自己编写代码(S-Function方式)，不是调用Simulink的已有编码、译码函数。 (2) 请在加性白高斯噪声信道中，画出比特信噪比与误码率的关系曲线。(4. Try to explain the working principle of convolutional codec: (1) Simulink was used to simulate convolutional coding, and Viterbi decoding method was used for decoding. The coding and decoding were all written by oneself (s-function method), rather than calling the existing coding and decoding functions of Simulink. (2) in the additive white gaussian noise channel, please draw the curve of the relationship between bit signal-to-noise ratio and bit error rate.)

串口发送、接收数据，显示数据、画图功能 可以选择16进制或ascii数据发送(Serial port to send, receive data, display data, drawing function can choose 16 hexadecimal or ascii data sent)