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Digital radio and television signal cognition method for navigation self-positioning

A digital broadcast TV and digital signal technology, applied in the field of digital broadcast TV signal cognition, can solve the problems of strong signal noise and interference

Inactive Publication Date: 2019-12-13
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a digital broadcast television signal recognition method for navigation and self-positioning to solve the problem of strong noise and interference in the signal existing in the prior art

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  • Digital radio and television signal cognition method for navigation self-positioning
  • Digital radio and television signal cognition method for navigation self-positioning
  • Digital radio and television signal cognition method for navigation self-positioning

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Embodiment Construction

[0056] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0057] Terrestrial Digital Video Broadcasting (DVB-T) is a transmission system developed by the European Digital Video Broadcasting Organization. It was formulated in 1996 and is currently the most widely covered digital TV terrestrial broadcasting standard in the world. The signal bandwidth is 8MHz and the frequency coverage is From 177.5MHz to 858MHz. This standard adopts coded orthogonal frequency division multiplexing (COFDM) modulation technology, which combines inner code coding and orthogonal frequency division multiplexing modulation. The transmission frame of the system adopts a layered frame structure. From top to bottom, there are superframe, signal frame, and OFDM symbol. Each symbo...

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Abstract

The invention discloses a digital radio and television signal cognition method for navigation self-positioning. The method comprises the following steps: designing a filter according to characteristicparameters; filtering the array data through the filter to obtain a first digital signal; grouping and combining the first digital signals to obtain second digital signals; and judging whether each group of second digital signals has the same-frequency station signal or not, if so, separating the second digital signals by adopting a blind source separation algorithm to obtain separated radio station signals, and if not, detecting the second digital signals by adopting an energy detection method to obtain separated radio station signals.

Description

technical field [0001] The invention relates to the field of cognitive radio, in particular to a digital broadcasting and television signal recognition method for navigation and self-positioning. Background technique [0002] After years of development, digital TV broadcasting signals (DTMB, DVB-T, FM) have become wider and wider in coverage and longer in range. At the same time, they have dense stations and high power. They have gradually become ideal for navigation and self-location. However, there is a problem that the selection of the radiation source and its frequency band by the system platform has a great impact on the positioning effect. The main reason is that there is strong noise and interference when this type of radio and television signal is transmitted to the receiving end, resulting in a decrease in signal quality. The accurate evaluation of the signal cannot be implemented by using the signal mixed with various interferences and noises, which affects the mea...

Claims

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Application Information

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IPC IPC(8): H04H20/47H04H20/88H04L27/00H04B17/382
CPCH04B17/382H04B2201/692H04H20/47H04H20/88H04L27/0006
Inventor 王峰吉丰
Owner HOHAI UNIV