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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:降低复杂度的多子带方法,宽带盲弹性检测和全球导航卫星信号的地学观测估计
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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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