Baseband processing device and method for receiving broadcasting positioning signals

Abstract

The invention provides a baseband processing device for receiving broadcasting processing signals, comprising a frame synchronization module, a rough capture module, a fine capture module, a tracking decoding module and a positioning calculation module which are sequentially connected. The frame synchronization module is used for carrying out frame synchronization on a baseband signal, the rough capture module is used for carrying out rough frequency offset estimation on the baseband signal, and the fine capture module is used for carrying out fine frequency offset estimation on the baseband signal; and the tracking decoding module is used for tracking the carrier phases and the code phases of successfully-captured and tracking spread-spectrum signals in various paths, decoding a telegraph text in broadcasting positioning signals, transmitted by different transmitter devices, calculating the SNR (Signal-to-Noise Ratio) of each path and calculating a delay difference according to the code phases of the broadcasting positioning signals of different broadcasting transmitter devices in different paths. The invention also provides a baseband processing method for receiving broadcastingpositioning signals and realizes the positioning function through acquiring the telegraph text and the parameters of the broadcasting positioning signals, such as delay difference, SNR, and the like,wherein the telegraph text is transferred by the broadcasting positioning signals and transmitted by different transmitter devices.

Description

【Technical Field】 [0001] The present invention relates to the technical field of mobile broadcast television, in particular to a baseband processing device and method for receiving broadcast positioning signals. 【Background technique】 [0002] In recent years, people's demand for accurate positioning indoors and outdoors has increased day by day, especially when responding to emergency situations, accurate positioning is even more important. The positioning technology in the prior art mainly includes: GPS positioning, mobile terminal base station positioning and so on. The following problem exists in the prior art: the GPS positioning method requires communication with satellites, so the cost of the existing GPS positioning terminal is relatively high. The mobile terminal base station positioning method requires communication with the base station, and therefore requires the mobile terminal to have a positioning function. However, a large number of current mobile terminals do no...

AI Technical Summary

Problems solved by technology

The following problems exist in the prior art: GPS positioning needs to communicate with satellites, so the cost of existing GPS positioning terminals is relatively high

However, for the current baseband processing technology for broadcast positioning signal reception, it can only receive broadcast signals and cannot obtain the messages transmitted by different transmitters transmitted by broadcast positioning signals, the time delay difference of broadcast positioning signals, and the signal-to-noise ratio parameters. The location function cannot be realized

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