Space-time anti-interference filter system of GPS receiver

Abstract

The invention discloses a space-time anti-interference filter system of a GPS receiver. The system comprises an antenna array, a low-noise amplifier unit, a down-conversion unit, an A / D conversion unit, an anti-interference processing unit and an one-way up-conversion unit; the antenna array is connected with the low-noise amplifier unit through a radio line A; two SMA connectors of the low-noise amplifier are respectively connected with a radio frequency line A and a radio frequency line B; the low-noise amplifier unit is connected with the down-conversion unit through the radio frequency line B; the radio frequency line C of the down-conversion unit is connected with the AC conversion unit; the AD conversion unit is connected with the anti-interference processing unit through a high speed I / O interface A; the anti-interference processing unit is connected with the up-conversion unit through the high speed I / O interface B; the up-conversion unit is connected with a TNC. The system has the characteristics of being high in positioning precision, high in anti-interference performance, high in reliability, low in power consumption, and small in size.

Description

technical field [0001] The invention relates to the field of GPS positioning systems, in particular to a GPS receiver space-time anti-interference filtering system. Background technique [0002] The GPS system is a new type of satellite navigation system jointly developed by the Army, Navy and Air Force of the U.S. Department of Defense in the 1870s. System" referred to as the GPS system. The system is a satellite-based radio navigation and positioning system, which has omnipotent, (land, marine, aviation and aerospace) global, all-weather, continuous and real-time navigation and positioning and timing functions, and can provide various users with precise 3D coordinates, speed and time. [0003] With the integration and miniaturization of satellite navigation receivers, they can be embedded in other communication, computer, security and consumer electronics products, expanding their application fields and penetrating into many sectors of the national economy. However,...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the GPS receiver itself, the received signal at the antenna end is very weak, coupled with its increasing dependence on the 24 satellite groups of the Global Positioning System (GPS) and the emergence of a dedicated GPS jamming system, the GPS signal may be affected. Intentional or unintentional interference

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