An Adaptive Processor Based on GNSS Antenna Array Without Loss of Vacuum

Abstract

The invention discloses a distortion-free space-time adaptive processor based on a GNSS antenna array. The distortion-free space-time adaptive processor is characterized in that the processor includesa processor body and a memory in communication connection with the processor body; the memory stores a distortion-free space-time adaptive processing program based on a GNSS antenna array; and the distortion-free space-time adaptive processing program based on a GNSS antenna array is executed by the processor body according to the following steps: A, estimating a space-domain steering vector; B,determining time-domain steering vector constraints; calculating a space-time steering vector; and D, calculating array weights, and outputting anti-jamming data. The time-domain steering vector constraints are introduced to the calculation of the space-time steering vector, and unbiased estimation of the pseudo code and carrier phase of a navigation signal is realized by calculating array weightsand outputting anti-jamming data. Therefore, the problem that a space-time adaptive processor based on an MVDR criterion will cause measurement deviation of the pseudo code and carrier phase of a navigation signal is avoided.

Description

technical field [0001] The invention relates to the technical field of array signal processing, in particular to a lossless vacuum time adaptive processor based on a GNSS antenna array. Background technique [0002] Since the 1970s, GNSS represented by GPS has brought great convenience to people's travel, and also played an irreplaceable role in military aspects such as navigation, aviation, and precision strikes. At the beginning of GPS design, the increasingly complex electromagnetic environment is not considered, which makes the vulnerability of GPS increasingly prominent. GNSS receivers must resist unintentional or intentional interference to ensure their performance. In the environment of strong electronic countermeasures, the space-time adaptive processor based on antenna array is the best choice. Space-time adaptive processing (STAP) forms a space filter according to the direction of interference and signal to process the received data. Filtering can not only effect...

AI Technical Summary

Problems solved by technology

The present invention provides a lossless vacuum-time adaptive processor based on GNSS antenna array, which aims to realize interference suppression and ensure the distortion-free transmission of navigation signals through space-time adaptive processing, and realize unbiased estimation of pseudocode and carrier phase of navigation signals , so as to avoid the problem that the space-time adaptive processor based on the MVDR criterion will cause the deviation between the pseudo code of the navigation signal and the carrier phase measurement

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