Radio combined positioning method based on digital broadcasting-television signal

Abstract

Syncretizing DTV terrestrial broadcasting with satellite broadcasting signal, the disclosed positioning and navigating method raises positioning performance. Receiving signals of civil DTV ground transmitting station and / or DTV broadcast satellite and navigation satellite with multiple space coordinates are known, the method determines space position of receiver. Being built on broadcast transmission system of radio signal, the method receives signals from radio broadcast systems and observes multiple emission sources to form system structure of combining multiple wireless positioning system and mode of position and navigation so as to obtain navigating solution of combined positioning system. All new operating mode of combined navigating system includes two types of wireless positioning system for observing ground and space at same time in the invention.

Description

technical field [0001] The invention is a method for determining the spatial position of the receiver by receiving signals from a plurality of civilian digital TV ground transmitting stations and / or digital TV broadcasting satellites with known spatial coordinates, belonging to digital TV broadcasting and radio navigation and positioning Composite technology field. Background technique [0002] Simultaneously receiving the radiation signals of multiple radio transmission sources with known spatial coordinates and time references, the geographical location of the user at the receiving end can be determined, that is, longitude, latitude and altitude (altitude). And positioning systems that set radio transmission sources on various orbiting satellites, such as: the Global Positioning System (GPS) of the United States, the Galileo (Galileo) system of Europe, the GLONASS system of Russia, and the "Beidou" positioning system of my country, etc. With the huge advantage of wide-area...

AI Technical Summary

Problems solved by technology

[0003] However, satellite positioning technologies such as GPS still have many shortcomings: GPS satellites transmit signals to the ground from an altitude of about 20,000 kilometers, and positioning errors will occur due to multipath effects, GPS satellite orbit errors, ionospheric delay effects, etc.; The positioning probability in the area is 60%, while the positioning probability indoors is zero, so it is difficult to use GPS technology for emergency rescue positioning; the real-time positioning of GPS technology is poor, and it takes 30s or more to complete initialization during cold start Working with satellite search, and then switching to the normal navigation and positioning work mode will delay the emergency rescue work; due to the adoption of the Selective Availability (SA) policy for GPS, the use of GPS satellite positioning under special circumstances will be interfered

[0005] However, this idea is not suitable for positioning in oceans, deserts, islands and other locations where DTV terrestrial broadcast signals cannot be received, and DTV signals based on satellite broadcasts can make up for this deficiency

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