Television broadcast signal forwarding positioning method and device

A technology of television broadcasting and positioning method, applied in the field of navigation and positioning, can solve the problems of low positioning accuracy and poor practicability, and achieve the effect of wide positioning range, strong practicability and eliminating clock errors

Inactive Publication Date: 2019-05-28
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing scheme requires a large number of measurements in advance, and the RSSI information of the signal changes with time, the positioning accuracy is low, and the practicability is poor

Method used

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  • Television broadcast signal forwarding positioning method and device
  • Television broadcast signal forwarding positioning method and device
  • Television broadcast signal forwarding positioning method and device

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] In a first aspect, the present invention provides a TV broadcast signal forwarding and positioning method, which realizes positioning by building a TV broadcast signal forwarding system, and the method includes:

[0024] Locating using original and retransmitted TV broadcast signals. The present invention contemplates erecting one or more television broadcast signal repeating stations outside the building. When setting up a transponder station, the present invention transmits the signals of at least two TV broadcast transmitting stations, utilizes the precise position of each transmitting station, and then uses the receiver to receive at least two channels of TV broadcast signals, and obtains the propagation of each channel of signals through correlation processing. The time difference, that is, the TDOA (Time Difference of Arrival) mea...

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Abstract

The invention discloses a television broadcast signal forwarding and positioning method and device. Positioning is achieved by building a television broadcast signal forwarding system. The method comprises the following steps of: original and forwarded television broadcast signals are used for positioning; one or more television broadcast signal forwarding stations are erected outside a building;when a forwarding station is erected, signals of at least two television broadcast transmitting stations are forwarded; at least two paths of television broadcast signals are received by using the precise positions of all transmitting stations and then receiving at least two paths of television broadcast signals by using a receiver, and obtaining the propagation time difference of each path of signals through related processing, namely a TDOA (Time Difference Of Arrival) measurement value, so as to finally realize positioning. According to the invention, a television broadcast signal can be independently used for positioning, assistance of other external radiation source signals is not needed, a large amount of pre-measurement is not needed before positioning, real-time positioning can berealized, the positioning range is wide, and the practicability is high.

Description

technical field [0001] The invention relates to the technical field of navigation and positioning, in particular to a TV broadcast signal forwarding and positioning method and device. Background technique [0002] The Global Navigation Satellite System (GNSS) has been able to provide users with accurate position, speed, time and other information, and has been widely used in many fields. However, in complex environments such as indoors, jungles, canyons, and city streets, GNSS signals are hindered and signal power is severely attenuated. These factors make ordinary GNSS receivers unable to capture tracking and positioning normally, so they cannot meet some military and civilian applications. need. With the increasing demand for navigation and positioning services, it is necessary to find a way to locate when GNSS cannot be located. [0003] The digital television signal (Digital Television, DTV) based on terrestrial broadcasting is a kind of non-navigation radio signal. By...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00
Inventor 秦红磊丛丽刘婷婷金天
Owner BEIHANG UNIV
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