卫星导航抗干扰最优接收机与相关接收机性能分析

为减小抗干扰接收机硬件实现难度,深入研究单天线卫星导航抗干扰相关接收机的性能,并详细分析其频域响应、信干噪比损耗和相关输出函数。分析表明,抗干扰最优接收机与相关接收机信干噪比损耗随着干扰带宽和干扰强度的增加而增大,随干扰频率与中心频率偏差和噪声带宽的增加而减小。此外,干扰将引起抗干扰接收机匹配与相关输出主峰降低和旁瓣抬高,从而影响接收机捕获、跟踪和多径抑制性能。研究结果将为卫星导航抗干扰接收机的优化设计提供依据。

Performance Analysis of Global Navigation Satellite System Anti-jamming Optimal Receivers and Correlation Receivers

Interfere suppression is one of the hotspot on Global Navigation Satellite System (GNSS). It is the focus how the performance of interfere suppression and signal reception can be simultaneously improved in anti-jamming receivers. The sole antenna GNSS anti-jamming optimal receivers are lucubrated on basis of the maximal signal-to-interference-noise ratio (MSINR) norm in partial-band interferences circumvent. Theirs frequency responses, SINR losses and match output functions are analyzed in detail. The sole antenna GNSS anti-jamming correlation receivers, which are used to reduce the hardware realization difficulty, are also studied in partial-band interferences circumvent. Theirs frequency responses, SINR losses and correlation output functions are present. It is showed that the SINR losses of anti-jamming optimal receivers and correlation receivers will increase with the bandwidth and power increase of interferences. The SINR losses will decrease with the bandwidth increase of noise and the frequency difference increase between interferences and signals. Moreover, it is showed that the match and correlation output main lobes will be depressed and the side lobes will be raised by jammers. As a result, the acquisition, track and multipath mitigation performance of anti-jamming receivers will be affected. The analysis results will provide the design basis for the GNSS anti-jamming receivers.