论文部分内容阅读
对于频率选择性瑞利衰落移动无线电通道,我们分析並设计了一种有效的数/模混合多信道模拟装置。该模拟器有8个线性互易的射频输出端。所有输出均相互独立,有45dB的端利衰落范围和相同的时延展宽。射频模拟技木与数字信号处理器(DSP)相结合给出了随机通道调制,来自时延展宽的频率选择性是由若干射频通道延迟单元产生的。所模拟的汽车速度在6至60英里/小时连续可变。因此,这种模拟器对于移动无线电传送技术的研究是一种灵活的工具。
For frequency selective Rayleigh fading mobile radio channels, we analyze and design an efficient digital / analog hybrid multi-channel simulator. The simulator has eight linear and reciprocal RF outputs. All outputs are independent of each other, with 45dB of end-user fading range and the same delay spread. The combination of RF analog technology and digital signal processor (DSP) gives random channel modulation and the frequency selectivity from the delay spread is generated by several RF channel delay elements. The simulated car speed is continuously variable from 6 to 60 mph. Therefore, the simulator for mobile radio transmission technology research is a flexible tool.