System and method for monitoring broadcast signals in online manner and parallelly demodulating same

Abstract

The invention discloses a system and a method for monitoring broadcast signals in an online manner and parallelly demodulating the same. The particular method includes enabling the system to divide channels by the aid of digital channelization technologies, separating multiple channels of mixed digital broadcast signals from one another and outputting the separated mixed digital broadcast signals in the multiple channels; enabling a monitoring module to search signals and judge whether the signals are outputted form each channel or not by the aid of automatic signal searching technologies; connecting the channels with the outputted signals to demodulation modules to demodulate the broadcast signals. The system and the method have the advantages that digital channelized receivers and digital broadcast demodulation systems are combined with one another, the digital channelization technologies on the basis of FFB algorithms, the automatic signal searching technologies and digital orthogonal demodulation technologies are provided, accordingly, functions of parallelly monitoring and demodulating the multiple channels of broadcast signals can be implemented, the system and the method are applicable to diversified broadcast signals [AM (amplitude modulation), DSB (double-side-band), SSB (single-side-band), FM (frequency modulation) and FM stereophonic broadcast signals] and are high in flexibility, and the efficiency of the broadcast receivers can be improved.

Description

technical field [0001] The invention relates to a system and method for on-line monitoring and parallel demodulation of broadcast signals, belonging to the field of wireless communication. Background technique [0002] In recent years, with the rapid development of wireless communication technology, wireless broadcast receivers are widely used in the fields of automobiles, mobile phones, televisions and other equipment due to their simple receiving tools and low prices. Receive broadcast signals in mobile devices such as cars. Amplitude modulation and frequency modulation are the two main modulation types for wireless broadcasting. Compared with AM radio, FM broadcast receiver not only has stronger anti-interference ability, but also has the characteristics of high sound quality and high stability of the received broadcast signal, so it has been widely used. [0003] With the development of AM broadcasting and FM broadcasting, digital broadcasting, which has gradually emer...

AI Technical Summary

Problems solved by technology

However, the actual broadcast signal frequency coverage is wide and the signal is relatively dense. At the same time, there will be multiple broadcast signals of different frequencies arriving at the same time. The single-channel broadcast receiver can only receive signals of one frequency value at the same time. Switch between channels to receive broadcast signals on different frequencies

Switching between channels will not only cause a large delay, but also cause loss of important information

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