现代通信系统MATLAB

ultrasonic curcit amjadmftah@hotmail.com

基于Matlab的OFDM原理仿真，调制解调的原理仿真，通过输出的星座图进行分析(Simulation based on Matlab OFDM principle, the principle of modulation and demodulation simulation output constellation diagram analysis)

The HART Application Guide has been created by the HART Communication Foundation (HCF) to provide users of HART products with the information necessary to obtain the full benefits of HART digital instrumentation. The HART communication protocol is an open standard owned by the more than 100 member companies in the HCF. Products that use the HART protocol to provide both analog 4–20 mA and digital signals provide flexibility not available with any other communication technology.

说明：  实现对稀疏信号的恢复，完成对稀疏信号的重建，压缩感知算法(siganl reconstructed)

相干解调的程序代码，可用于光电检测,包括光纤传感、分布式检测等 (heterodyne detection code ,is used for opto-electronic)

costas环matlab仿真，已经通过验证可行(Costas ring matlab simulation, has been verified feasible)

关于移动通信中MIMO中的CDD发射分集算法( CDD transmit diversity algorithm on MIMO in the Mobile communication)

说明：  可以同时模拟多个GB28181摄像头。 用于GB28181平台的压力测试(Multiple gb28181 cameras can be simulated at the same time. Pressure test for gb28181 platform)

In this paper, we present and analyze efficient frame synchronization and frequency offset compensation scheme with ternary sequences for an orthogonal frequency division multiplexing (OFDM) system in Rayleigh fading channels. Frame synchronization is an essential procedure for normal operation of the OFDM system because of sensitivity to synchronization errors. And when there are frequency offsets in OFDM frame, the loss of orthogonality occurs and the interference problem among several subcarriers is introduced. These fact leads to the requirement for joint implementation of the frame synchronization and frequency offset compensation.

建立了直接序列扩频系统的matlab仿真模型，在信道中存在高斯白噪声和干扰的情况下，对系统的在不同扩频增益下的误码率性能进行了仿真及分析，分析了扩频码的自相关性、误码率、性噪比。(A matlab simulation model of the direct sequence spread spectrum system, the existence of Gauss white noise and interference in the channel under the condition of the system in different spreading gain the BER performance of the simulation and analysis, analysis of PN code autocorrelation, BER, SNR)