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Multi-subband methods for reduced complexity, wideband blind resilient detection and geo-observable estimation of global navigation satellite signals
Multi-subband methods for reduced complexity, wideband blind resilient detection and geo-observable estimation of global navigation satellite signals
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机译:用于降低复杂性,宽带盲弹性检测和全球导航卫星信号的地理可观察估计的多子带方法
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摘要
A method and apparatus is claimed here for reduced-complexity detection and estimation of geo-observables of global navigation satellite systems (GNSS) signals employing civil formats with repeating ranging codes, including true GNSS signals generated by satellite vehicles (SV's) or ground beacons (pseudo-lites), and malicious GNSS signals, e.g., spoofers and repeaters, using multi-subband symbol-rate synchronous channelization architectures that can exploit the full substantive bandwidth of the GNSS signals with managed complexity in each subband. Aspects employing spatial/polarization receivers are also claimed that can remove and geolocate non-GNSS jammers received by the system, as well as targeted GNSS spoofers that can otherwise emulate GNSS signals received at victim receivers. Aspects disclosed herein also provide time-to-first-fix (TTFF) over much smaller time intervals than existing GNSS methods; can operate in the presence of signals with much wider disparity in received power than existing techniques; and can operate in the presence of arbitrary multipath.
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