Navigation information broadcasting method, transmitter, receiving method, receiver and system

Abstract

The invention provides a navigation information broadcasting method, a transmitter, a receiving method, a receiver and a system. The navigation information broadcasting method includes the following steps: enabling a transmitter to receive and demodulate a navigation satellite signal to obtain a demodulation result; synchronizing the own reference time of the transmitter and calibrating the own clock frequency of the transmitter according to the demodulation result; and periodically sending a broadcast signal according to the demodulation result, wherein the broadcast signal is composed of atleast two continuous sub-broadcast signals, each of the sub-broadcast signals includes a visible navigation satellite number and an original navigation message, an initial position of the first sub-broadcast signal in the broadcast signal is a ranging code, and at least one sub-broadcast signal in the broadcast signal includes at least one of the initial reference time of the ranging code, the position of the transmitter and an ephemeris of the navigation satellite. According to the scheme of the invention, the problem of low sensitivity caused by the delay of the navigation message in a navigation signal capture process can be solved.

Description

technical field [0001] The invention relates to the technical field of wireless navigation, in particular to a navigation information broadcasting method, a transmitter, a receiving method, a receiver and a system. Background technique [0002] In the traditional wireless navigation and positioning system, the traditional pure space-based satellite receiver is generally difficult to achieve positioning indoors. AGPS (Assisted GPS: Assisted Global Positioning System) combines public land mobile communication networks (including second-generation and third-generation mobile communication systems and their subsequent evolution) with traditional satellite positioning, and uses the ground base stations of the mobile communication network to send auxiliary satellites Information, so as to reduce the delay time for GPS chips to obtain satellite signals, and the covered indoors can also be compensated by ground base station signals, reducing the dependence of GPS chips on satellites...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a high-sensitivity navigation information broadcasting method, transmitter, navigation information receiving method and receiver that can continuously and real-time receive navigation messages in order to address the problem that navigation messages cannot be continuously and real-time received in indoor navigation.

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