脉冲超宽带测控信号性能研究

摘要

Currently, the security performance of TT&C signal is increasingly to be improved. Communication with Impulse Radio-Ultra Wideband signal is a kind of wireless communication technology which uses the nanosecond pulse as a carrier and has high data transmission speed and good performances of concealment, anti-interference and intercept resistance. The application of IR-UWB signal in TT&C field can greatly improve the security of the current TT&C system. Firstly, according to the link budget, the feasibility of using IR-UWB signal in TT&C system is studied. Then, by comparing DS-PAM IR-UWB signal with direct spread spectrum signal, the performances of concealment, anti-interference and intercept resistance of the IR-UWB signal are analyzed. Theoretical analysis and simulation results show that the IR-UWB TT&C signal has good performances of concealment, anti-interference and intercept resistance.%当前,航天测控系统的安全性亟待提高.脉冲超宽带通信是指利用脉宽为纳秒级的脉冲作为载体的无线通信技术,具有数据传输速率高、抗干扰与抗截获能力强、隐蔽性较好等特性.将脉冲超宽带技术应用于航天测控系统,能够大幅度提高当前测控系统的安全性.首先通过链路预算,对脉冲超宽带信号应用于测控领域的可行性进行研究.然后,以DS-PAM脉冲超宽带信号为例,通过与直接扩频信号进行比较,分析脉冲超宽带信号的隐蔽性、抗干扰性和抗截获性.理论分析与仿真结果表明,脉冲超宽带测控信号具有良好的隐蔽性、抗干扰性和抗截获性.