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Windows系统下Modbus RTU协议从站，VB.net开发，可以直接支持研华系列采集模块的源代码(Windows systems, the Modbus RTU protocol slave, VB.net developers can directly support the of Advantech series acquisition module source code)

这个文档对蓝牙开发有很大的帮助，希望可以帮到大家，(bluetooth)

说明：  对当前通信信号中常用的数字调相信号BPSK、QPSK、1／4一QPSK、8PSK的调制识别问题，提出了一种基于信号差分高阶累积量的识剐算法。该算法分两个层次进行调制识别，首先利用信号的四阶累积量特征对BPSK、QPSK和{1／4一QPSK、8PSK}信号进行识别，然后再利用信号差分的四阶和八阶累积量特征对1/4-QPSK、8PSK信号进行识别。从理论上分析了的该算法的有效性，并通过计算机仿真验证了算法具有良好的性能。(A recognition algorithm based on differential high-order cumulant is proposed for the modulation recognition problems of BPSK, QPSK, 1/4-QPSK and 8PSK, which are commonly used in current communication signals. The algorithm is divided into two levels for modulation recognition. Firstly, BPSK, QPSK and {1/4-QPSK, 8PSK} signals are identified by using the fourth-order cumulant characteristics of signals, and then 1/4-QPSK and 8PSK signals are identified by using the fourth-order cumulant and eighth-order cumulant characteristics of signal difference. The validity of the algorithm is analyzed theoretically, and the good performance of the algorithm is verified by computer simulation.)

仿真二进制正交信号通过AWGN信道后的误比特率性能，每个信号周期取样10次，接收端采用相关器，Eb/N0的范围是0到12dB(Simulation binary quadrature signals by the bit error rate performance in an AWGN channel, each signal cycle sampled 10 times, the receiving side uses the correlation Eb/N0 is the range of from 0 to 12dB)

用的Rsoft软件 模拟了两个矩形直波导的耦合情况，并监测其功率变化。 可用于分析微环耦合区域的光场。(Rsoft software used to simulate the two rectangular straight waveguide coupling, and to monitor their power change. Can be used to analyze micro-ring coupling region of the light field.)

NFC协议第一部分，描述了NFC tag 1 通讯协议(NFC protocol first part describes the communication protocol NFC tag 1)

说明：  小数频锁相环建模，适用于学习了解小数频率综合器设计人群。(Modeling of fractional frequency PLL)

c-c算法可计算关联维数，延迟时间，嵌入维数等，对混沌分析有很大的意义(The C-C algorithm can calculate correlation dimension, delay time, embedding dimension and so on, which is of great significance for chaos analysis.)

该程序给出了LDPC编译码程序的经典算法，即BP算法，性能比较好(The program gives the classic algorithm LDPC decoding procedures, namely BP algorithm, the performance is better)

help you to learn use VB cominacate to outher maine