本学位论文的工作在超高频射频识别(UHFRFID)系统的理论研究和设计 实践领域进行，包括了长距离无源后向散射UHFRFID阅读器射频前端的研制、脚B(超宽带)RFID系统源脉冲波形的优化设计、UHFRFID阅读器小型化天线的研制和UHFRFID标签天线的优化设计四个方面的研究内容。 -The dissertation work in the UHF radio frequency identification (UHFRFID) system of theoretical resear

针对在无线电监测和认知无线电系统中,信号参数估计这一重要问题,证明了OFDM信号具有循环平稳性的必要条件是加循环前缀或有非矩形脉冲成型,并以线性周期时变变换(LPTV)模型为基础,推导了OFDM信号的循环谱表达式-For radio monitoring and cognitive radio systems, signal parameter estimation of this important issue, the necessary condition for the OFDM sig

Radio is the use of radio waves to carry information, such as sound, by systematically modulating some property of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width.[n 1] When radio wave