非规则LDPC码在AWGN信道下的性能仿真

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.)

opnet与matlab联调的步骤，过程详细，使用方便(Steps of OPNET and MATLAB debugging, detailed process, easy to use)

支持IEC60870-5-104: 2000 IEC104规约软件包 实现104规约主站侧链路层的功能(IEC_Master_104.lib: void Init_SockServerport(WORD port=2404) void Init_Linkpara(int t0=30,int t1=15,int t2=10,int t3=20,int k=12,int w=8) virtual void On_init_Link_process() virtual void On_init_Sock_process() virtual void On_ErrorMsg(char*msgbuf) void slave_start() void slave_close() )

说明：  ldpc编码，里面有ldpc编码，译码以及一系列的具体说明(ldpc encode,ldpc decode and so on)

正交频分复用中当调制方式采用QDPSK时的解调程序(Orthogonal frequency division multiplexing modulation when used in QDPSK procedures at the time of demodulation)

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：  ofdm qpsk 添加循环前缀 信道估计 补偿与均衡 信号星座图(OFDM QPSK add cyclic prefix channel estimation compensation and equalization signal constellation)

PSK通信信号盲解调测试程序，final1_1和final1_2为两种不同的产生PSK通信信号的程序，final2_1预估计载波频率，final2_2预估计码元速率，final3进行载波同步，final4进行码元同步，进而解调出原信号。(PSK Blind Demodulation)

说明：  频率选择性信道下无编码OFDM系统的误码率曲线。(BER of OFDM signals in FS channel without coding)

说明：  以均匀圆阵为例，通过功率倒置算法，使特定方向上的天线增益最大，已达到波束成形，空域滤波的目的 参考文献《GNSS空域抗干扰算法研究及FPGA实现》(Research on Spatial Anti-jamming Algorithms of GNSS and FPGA Implementation)