Method and device for synchronization and receiving of digital audio broadcasting signal frequency

Abstract

The invention provides a method for synchronization and receiving of digital audio broadcasting signal frequency. The method includes: adjusting front-end set frequency point by a receiver, demodulating digital audio broadcasting signals in a subband, extracting nominal frequency point information of a current subband contained in system information and frequency spectrum mode index information adopted by a current digital audio broadcasting signal, adjusting front-end frequency point setting of the receiver according to the extracted nominal frequency point information of the current subband and the frequency spectrum mode index information adopted by the current digital audio broadcasting signal, and finishing central frequency point synchronization under a current digital audio broadcasting signal frequency spectrum mode. The invention further provides a device for synchronization and receiving of the digital audio broadcasting signal frequency. Using the method and the device can efficiently and quickly recognize frequency spectrum combination modes in current digital audio broadcasting signals and meet needs of high-capacity multi-business data receiving under digital audio broadcasting.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a method and device for frequency synchronization and reception of digital audio broadcasting signals in a digital audio broadcasting system. Background technique [0002] The traditional FM frequency band (87Mhz-108Mhz) is the FM radio frequency band, and its occupied bandwidth is 100KH or 200KHz, which can only provide users with the most basic broadcast services. At present, China still uses traditional analog FM radio. The use of digital audio broadcasting to provide digital audio and data services is broadcast, point-to-multipoint, point-to-face, and the cost of broadcasting information has nothing to do with the number of users. large area. Regardless of audio quality, spectral efficiency or support for new services, it has unparalleled advantages over traditional analog broadcasting. [0003] At present, the main digital audio broadcasting techno...

AI Technical Summary

Problems solved by technology

However, the DRM system is a narrow-band system like the traditional analog audio broadcasting. For frequency selective fading caused by radio wave multipath propagation, frequency diversity cannot be realized, and the system performance is not ideal.

And the DRM system can only support a 100khz broadcast channel frequency band, and cannot support higher business data volume

Images