【摘要】 针对超宽带TH-PPM调制技术在多个频带干扰条件下的抗干扰性能进行了分析研究。基于超宽带TH-PPM调制所使用脉冲波形的不同,推导得出了在多个频带干扰条件下,超宽带TH-PPM调制技术的抗干扰能力指标的通用数学表达式。该结果对单频带干扰也同样适用。此外,在多个频带干扰条件下,对超宽带TH-PPM调制技术、直接序列扩频调制技术和跳频调制技术的抗干扰性能进行了比较分析研究,并分别对其进行了数值仿真。仿真结果表明,在多数情况下,超宽带TH-PPM调制技术抑制多个频带干扰的能力,明显优于直接序列扩频调制技术和跳频调制技术。更多还原

【Abstract】 The performance of ultra-wideband(UWB) communications in the presence of multi-band interferences is studied.Closed-form expressions are provided for the antijamming ability of UWB time-hopping and pulse position modulated(TH-PPM) communication system,which are applicable to more practical UWB waveforms such as Gaussian and Rayleigh monocycles.Comparisons of the interference suppression capability among UWB direct-sequence spread-spectrum(DS-SS) and frequency hopping spread-spectrum(FH-SS) are carried out respectively under the conditions similar to all systems.It is shown that in most cases,the interference suppression capability of UWB TH-PPM is superior to that of DS-SS or FH-SS under multi-band interferences.更多还原