Digital frequency modulation (FM) broadcast based clock synchronization method and FM broadcast receiver

Abstract

The invention discloses a digital FM broadcast based clock synchronization method. The method comprises that an FM broadcast receiver receives radio data broadcast signals broadcast by an FM broadcast transmitter which is synchronized with standard time; the FM broadcast receiver obtains time synchronization signals in the radio data broadcast signals by demodulation; the FM broadcast receiver obtains local time information of the received time synchronization signals; and according to local position information, the time synchronization signals and local time information of the FM broadcast receiver, time and frequency of a local clock of the FM broadcast receiver are synchronized. The invention also discloses the FM broadcast receiver. Thus, clock of a pseudo-satellite system or a pseudo-satellite similar system is synchronized via FM broadcast, the FM broadcast transmitter transmits standard time to the corresponding FM broadcast receiver via the FM frequency range, and the technical problem that clock synchronization of the pseudo-satellite system or the pseudo-satellite similar system relies on satellite navigation excessively is solved.

Description

technical field [0001] The invention relates to the technical field of wireless navigation, in particular to a digital FM radio-based clock synchronization method and an FM radio receiver. Background technique [0002] With the increasing dependence of human society on satellite navigation, the shortcomings of weak signals of existing global satellite navigation systems (Beidou, Global Positioning System (Global Positioning System, GPS), etc., collectively referred to as Global Navigation Satellite System (GNSS)) have become increasingly prominent: It is difficult to locate in low-rise buildings, jungles and canyons; it is basically impossible to locate in high-rise buildings in cities; more and more incidents interfere with radio navigation in the name of privacy protection, which further reduces the daily usability of navigation systems; in war and confrontation environments, Radio navigation countermeasures are becoming more and more mature. As a result, the usability of...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a clock synchronization method and FM radio receiver based on digital FM broadcasting, aiming to solve the technical problem that the clock synchronization of pseudolite system or similar pseudolite system is too dependent on satellite navigation

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