pdsch4g

说明：  在n个城市建设通信网络，只需架设n-1条线路即可至少包含10个城市，城市数n由键盘录入，城市坐标由随机函数产生小于100的整数(In the construction of communication network in n cities, only n-1 lines are needed to include at least 10 cities. The number of cities n is input by keyboard, and the coordinates of cities are generated by random functions into integers less than 100.)

simulink仿真收音机链路FM radio(Simulink simulation radio link)

Mamul for connecting 840D SL system by OPC

vawecom gsm modem gsm,gprs,ip stack documentation(vawecom gsm modem gsm, gprs. ip stack documentation)

扩频通信系统实用仿真技术一书的所有源代码,包括 信道编码译码(有LDPC码),扩频调制,载波调制,PN码同步,窄带干扰抑制,直扩频系统仿真实列,跳频系统仿真实例等(spread spectrum system simulate technology)

当今世界电子对抗日益激烈，对于雷达低截获和抗干扰能力的研究越来越受到关注。OFDM (Orthorgonal Frequency Division Multiplexing，正交频分复用)雷达具有大时宽带宽积、波形设计方法灵活、频谱利用率较高以及低截获性能好的特性，因此逐渐成为雷达领域的重点研究方向。除此之外，OFDM信号时域和频域波形都比较复杂，当雷达信号采用OFDM技术时，敌方很难精确估计发射信号波形和瞬时频率，使得截获机不容易分析出检测到的雷达信号。当面对敌方的欺骗式干扰时，对于同样具有大时宽带宽积的线性调频信号，OFDM信号具有更好的抗欺骗式干扰的性能，因此OFDM技术在雷达上的运用愈来愈得到关注。(As electronic warfare becomes increasingly fierce, low intercept probability radar has become an important research filed in electronic countermeasures. OFDM (Orthorgonal Frequency Division Multiplexing) radars have gradually emerged due to their high spectrum efficiency, large time-bandwidth product, flexible waveform design methods, and low intercept probability.In addition, because of the complex time-frequency characteristics of the transmitted signal in OFDM radar, the enemy is difficult to estimate the transmitted signal waveform and instantaneous frequency.When faced with enemy deception interference, OFDM signals have better anti-spoofing performance for LFM signals that also have a large time-bandwidth bandwidth product. Therefore, the use of OFDM technology in radar is attracting more and more attention. .)

基于IRA天线的辐射波模拟器天线辐射性能研究(Radiation wave simulator antenna radiation performance of the antenna-based IRA)

说明：  从网上找的SAE J1939 介绍的总结，主要是应用层介绍，包括PGN和SPN的计算及介绍。(Summary and Introduction of J1939.)

说明：  This program is for division of natural semiconductor

一篇非常经典的关于CDMA系统自适应阵列信号处理恒模算法(a very classic on the CDMA system adaptive array signal processing CMA)