35569_91417v00_Wimax

OPNET仿真的无线信道，OPNET仿真的无线信道

这是在MATLAB环境下实现ppm调制解调的程序代码(This is the code in the MATLAB environment ppm modem)

Bluetooth Combat Robot Code in Assembly Language. Robot for Robowar

this project simulate the voice communication between two subscriber stations in office scaled module and test the communications between them

BPSK调制解调 误码率、眼图、星座图，频谱、MATLAB平台(BPSK modulation and demodulation error rate, eye map, constellation diagram)

估计接收到的直扩信号的载频，码速率，以及扩频增益(Estimate the carrier frequency, code rate, and spread spectrum gain of the received DSS signals)

说明：  太赫兹通信方面的代码，可以对照相关文献看(Terahertz communication)

BPSK调制在高斯信道下的性能，误比特率和信噪比的曲线(BPSK modulation performance under gaussian channel, signal to noise ratio and bit error rate curve )

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.)

说明：  matlab锁相环解决相干光通信系统激光器相位噪声(Phase-locked loop to solve the phase noise of laser in optical communication system)