一种组合调制的脉冲超宽带测控信号

将脉冲超宽带（IR-UWB）信号应用于航天测控领域，能够有效提高当前航天测控系统的隐蔽性、抗干扰性和测量性能，具有重要的现实意义。将DS-PAM（Direct Spread-Pulse Amplitude Modulation）调制、TH-PPM（Time Hopping-Pulse Position Modulation）调制的信号和PSM（Pulse Shape Modulation）调制技术组合起来，可构成一种新的组合调制的脉冲超宽带信号，即DS-PAM-TH-PPM-PSM-UWB（Direct Spread-Pulse Amplitude Modulation-Time Hopping-Pulse Position Modulation- Pulse Shape Modulation-Ultra Wideband）信号。利用对数正态阴影模型分析其传输性能，在单频干扰信号条件下分析其抗干扰性能，利用模糊函数分析其测量性能。仿真结果表明，相比于传统的DS-PAM-UWB信号和TH-PPM-UWB信号，该组合信号具有良好的传输性能、抗干扰性能和测量性能，为脉冲超宽带信号应用于航天测控领域提供了更多的选择。

A combined modulation IR-UWB TT&C signal

Applying Impulse Radio-Ultra Wideband(IR-UWB) signal in space tracking,telemetry and command(TT&C) system can effectively improve concealment,anti-interference performance and measurement performance of TT&C system. This paper intends to combine Direct Spread-Pulse Amplitude Modulation(DS-PAM),time hopping-pulse position modulation(TH-PPM) signal and pulse shape modulation(PSM) technique to constitute a new combination of pulse modulated ultra-wideband signal called DS-PAM-TH-PPM-PSM-UWB(Direct Spread-Pulse Amplitude Modulation-Time Hopping-Pulse Position Modulation- Pulse Shape Modulation-Ultra Wideband) signal . By using the lognormal shadowing path loss model,the transmission performance is analyzed. Its anti-interference performance is analyzed under single-frequency signal interference condition and its measurement performance is analyzed using ambiguity function. Simulation results show that the transmission performance,anti-jamming performance and performance measurement of the combined signal are improved compared with conventional DS-PAM-UWB signal and TH-PPM-UWB signal. Therefore more choices are provided for application of IR-UWB signal in TT&C field.