Digital channelized receiver system for broadcast signal monitoring

Abstract

The invention provides a digital channelized receiver system for broadcast signal monitoring. The digital channelized receiver system for broadcast signal monitoring is suitable for synchronous and in-time monitoring on multichannel time-domain overlapped broadcast signals by a broadcast signal monitoring organization, and is suitable for the recording and evidence obtaining of abnormal broadcast signals. The digital channelized receiver system comprises a front signal receiving module, an analog-digital conversion module, a digital channelized module, a component channel detection and demodulation module and a component channel signal recording module. Extraction with a maximum extraction ratio is conducted at the input end of each channel of multichannel time-domain overlapped broadcast sampled signals based on poly-phase filter banks technology by the digital channelized module, and the broadcast sampled signals are deposited into the corresponding RAM addresses according to the channel numbers. When one channel signal is completely deposited, channelization smoothing is conducted according to the corresponding channel number filter parameter deposited in ROM, and time division multiplexing of the filter is realized. According to the digital channelized receiver system for broadcast signal monitoring, synchronous and in-time monitoring on multichannel time-domain overlapped broadcast signals is achieved, the work efficiency is improved, the calculated amount of the system is lowered, and the noise of the receiver is limited to minus 58 d B.

Description

technical field [0001] The invention relates to a digital channelized receiver system for broadcast signal monitoring, which is suitable for broadcast signal monitoring institutions to monitor multi-channel time-domain overlapping broadcast signals synchronously and in real time, and to record and collect illegal broadcast signals. Background technique [0002] Broadcasting plays an important role in the rapid development of Chinese society. It has a wide range of communication, fast transmission speed, and strong penetration. It has always been an irreplaceable means of disseminating information. With the development of broadcasting technology, the monitoring and management of broadcasting signals is also particularly important. In the past, the general demodulator was used for broadcast signal monitoring, and all programs could only be monitored in a round-robin manner, and the monitoring work efficiency was relatively low. [0003] The polyphase structure plays an import...

AI Technical Summary

Problems solved by technology

In the past, the general demodulator was used for broadcast signal monitoring, and all programs could only be monitored in a round-robin manner, and the monitoring work efficiency was relatively low.

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