Digital power dynamic access method based on DRM+

Abstract

The invention discloses a digital power dynamic access method based on DRM+, comprising the following steps of 1, generating an analog FM frequency modulated signal; 2 , obtaining the transmission power of a digital signal by using a digital power dynamic access algorithm according to the real-time spectrum distribution of the analog FM signal; and 3, according to the transmission power obtained by the algorithm, adjusting the transmission parameter of a DRM+ signal in real time and sending to a DRM+ exciter, and finally sending out the self-adapting digital signal. According to the digital power dynamic access method, through adding a self-adaptive adjusting module between the analog FM signal and the DRM+ signal, the transmission power of the digital signal is dynamically adjusted according to the real-time distribution of the analog signal, thus the listening quality of the digital user can be improved under the premise of ensuring that the listening quality of the analog user is not reduced.

Description

technical field [0001] The invention relates to the fields of radio and television transmission and broadcast digitization, in particular to a DRM+-based digital power dynamic access method. Background technique [0002] Digitization of broadcasting is a hot issue in domestic and foreign technical research at present, and digital sound broadcasting in my country is still in the research stage. Different digital broadcasting systems have different operating frequency bands and radio frequency bandwidths. During the transition period from analog to digital, digital systems should not interfere with current analog broadcasting and other radio services. The bandwidth of the DRM+ system is designed to be the same as the interval of the current analog channels. As long as there is free spectrum, digital channels can be inserted at any time, which will not interfere with the existing analog broadcasts, and facilitate the replacement of analog channels by digital channels one by one...

AI Technical Summary

Problems solved by technology

[0006] However, since the spectral bandwidth of the FM analog signal changes with the program signal (such as frequency and power), while the spectral position and power of the digital signal are fixed, the audio quality of different periods of time heard by the human ear varies greatly. This provides opportunities for dynamic access to DRM+ digital power

[0007] When the DRM+ signal dynamically adjusts the power according to the spectrum distribution of the analog FM signal, an inevitable question that needs to be discussed is whether the dynamic distribution of the power of the digital signal will deteriorate the listening quality of the analog user

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