| 摘要: |
| 针对当前航天测控系统安全性不足的问题，将脉冲超宽带技术应用于航天测控系统中，构建了一种新的脉冲超宽带测控体制。建立了基本的脉冲超宽带测控信号模型，对脉冲超宽带测控系统的性能和传输链路进行了分析。给出了脉冲超宽带测控系统结构框图，介绍了系统工作过程。针对并行信号捕获方法资源消耗大的不足，提出了两步并行捕获方法。分析表明，脉冲超宽带技术可用于航天测控系统中，完成测距测速和数据传输任务。脉冲超宽带测控系统可有效提高测控系统的隐蔽性和抗干扰能力，同时提高测距精度。在信号捕获方面，与并行捕获方法相比，两步并行捕获方法的硬件资源消耗得到大大降低，同时还可保证较快的捕获速度，但会产生一定的信噪比损失。 |
| 关键词: 航天测控 脉冲超宽带技术 安全性 系统设计 信号捕获 |
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| Application of impulse radio UWB technology in space TT&C system |
| LIAN Xin,WANG Yuanqin,HOU Xiaomin,MENG Xiangli |
| () |
| Abstract: |
| According to the security shortcoming of current space TT&C system,the impulse radio ultra-wideband(IR-UWB) technology is introduced into TT&C system,and a new IR-UWB TT&C system is established.A basic IR-UWB TT&C signal model is built,and the performance and transmission link of the system are analyzed.The structure diagram of the IR-UWB TT&C system is given,and the whole working process of the system is introduced.According to the excessive resource consumption of the parallel signal acquisition method,a new two-step parallel acquisition method is proposed.Analysis shows that the IR-UWB technology can be used in TT&C system to accomplish range and range rate measurement and data transmission.The IR-UWB TT&C system can effectively improve the concealment performance and anti-interference ability of TT&C system,and improve the range measurement accuracy at the same time.As for signal acquisition,compared with parallel acquisition method,the hardware resource consumption of the two-step parallel acquisition method is greatly reduced,and this method can also guarantee a fast acquisition speed,but it will bear certain signal-to-noise ratio(SNR) loss. |
| Key words: space TT&C;impulse radio UWB technology security performance system design signal acquisition |
