Ultra-wideband (UWB) pulse signal has an extremely narrow pulse width and wide frequency bandwidth, which overlaps with the operating frequency band of Global Position System (GPS) receivers, posing a potential threat to their performance. In response to this problem, through mathematical analysis and software simulation, the effects of UWB pulse signal under time-hopping-pulse position modulation (TH-PPM) on the performance of GPS receivers were studied. First, the expression and waveform of the UWB pulse signal were analyzed in the time-frequency domain, and it is concluded that the pulse repetition frequency (PRF) mainly affects the discrete spectrum of the UWB signal and the TH code period mainly affects the continuous spectrum. On this basis, the simulation on the power spectral density (PSD) of GPS signal and UWB signal under different pulse parameters was represented, from which a conclusion can be drawn that the PRF is the main factor impacting the PSD of the GPS signal. Furthermore, this paper analyzed the degradation of GPS receiver equivalent carrier-to-noise ratio (C/N₀) and C/A code demodulation bit error rate (BER) under UWB interference, which are the crucial evaluating indicators of GPS signal quality. Eventually, we theoretically calculated the minimum interference level of the UWB interference signal to the GPS receiver, providing a theoretical reference for reducing the interference effects of UWB pulse signal on the performance of GPS receivers.

中文翻译：

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UWB 脉冲信号对 GPS 接收机的干扰影响仿真

超宽带（UWB）脉冲信号具有极窄的脉宽和宽频带宽，与全球定位系统（GPS）接收机的工作频段重叠，对其性能构成潜在威胁。针对这一问题，通过数学分析和软件仿真，研究了跳时脉冲位置调制(TH-PPM)下UWB脉冲信号对GPS接收机性能的影响。首先，从时频域分析了UWB脉冲信号的表达式和波形，得出脉冲重复频率（PRF）主要影响UWB信号的离散频谱，TH码周期主要影响连续的光谱。以这个为基础，对不同脉冲参数下GPS信号和UWB信号的功率谱密度(PSD)进行了仿真，得出结论：PRF是影响GPS信号PSD的主要因素。此外，本文还分析了 GPS 接收机等效载噪比（UWB干扰下的C / N ₀ )和C/A码解调误码率(BER)是GPS信号质量的重要评价指标。最后，我们从理论上计算了UWB干扰信号对GPS接收机的最小干扰电平，为降低UWB脉冲信号对GPS接收机性能的干扰影响提供了理论参考。