zf_4qam_22

说明：  网络芯片ch563读写u盘例程，例程完整，方便开发(The network chip ch563 reads and writes the U disk routine, which is complete and convenient for development)

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.)

bpsk qpsk 16qam 64qam频带上的调制解调信号包括误码率曲线，眼图和星座图(bpsk qpsk 16qam 64qam modulation and demodulation)

说明：  一种简单的GPS的C/A码及导航电文建模(GPS C / a code and navigation message modeling)

说明：  数字信号的调制识别，提取了信号的时域特征与频域特征。包含神经网络训练。(Modulation recognition of digital signal.The time-domain and frequency-domain features of the signal are extracted. Including neural network training.)

说明：  无源被动雷达对目标进行定位之生成雷达信号,产生信号(Passive Radar Detection using Range-Doppler Transformations generate signal)

介绍移动通信gsm原理的书籍，对从事移动通信工作或研究的人员提供参考和帮助。(introduced mobile communications gsm tenets of books, right to engage in mobile communications work or research personnel with information and help.)

用C++语言封装的MODBUS通信协议 可直接在工业中用于RS485 与232的通信(modbus communication is demonstrated by c++ language)

在ofdm调制中运用压缩感知中OMP算法进行信道估计并与LS算法进行比较(Ofdm modulation using compressed sensing OMP algorithm for channel estimation and comparison with the LS algorithm)

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