Chinese terrestrial digital television single frequency network-based positioning method and system

A terrestrial digital TV and positioning method technology, which is applied in the field of wireless transmission, can solve the problems of low precision and high complexity, and achieve the effects of high positioning accuracy, short positioning time, and low positioning interference

Active Publication Date: 2013-06-05
TSINGHUA UNIV
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Problems solved by technology

The former is limited by the sampling rate, and the precision is not high; the latter has higher precision, but the complexity is also high

Method used

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  • Chinese terrestrial digital television single frequency network-based positioning method and system
  • Chinese terrestrial digital television single frequency network-based positioning method and system
  • Chinese terrestrial digital television single frequency network-based positioning method and system

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Embodiment Construction

[0048] The time-frequency two-dimensional joint positioning method and system based on China's terrestrial digital television single frequency network proposed by the present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] The method and system of the present invention can distinguish different transmission towers in the digital television single frequency network under the premise of ensuring the basic framework of China's terrestrial digital television system, and obtain the precise distance difference between different transmission towers and receivers, thereby realizing A wireless positioning system solution based on China's terrestrial digital television single frequency network. Such as figure 1 As shown, according to an embodiment of the present invention, a time-frequency two-dimensional joint positioning method based on China's terrestrial digital television single frequency network includes steps:

[00...

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Abstract

The invention discloses a Chinese terrestrial digital television single frequency network-based time-frequency two dimensional combined positioning method and a system, which solve the problems of pseudo-range measurement and launching tower discrimination in positioning processing. The method comprises the following steps of: S1, performing time division multiplexing on a transmission parameter signaling (TPS) signal at a transmitting terminal; S2, correlating a received time domain training sequence with a local pseudo-random noise (PN) sequence by a receiver to obtain initial estimations of integral multiple time delays of signals from each launching tower; S3, processing the TPS by regarding the TPS after demodulation decision as an orthogonal frequency domain pilot frequency to obtain integral multiple and decimal time delay estimations of the signals transmitted by each launching tower; and S4, obtaining a signal transmission time delay according to the integral multiple and decimal time delay estimations to further obtain the transmission time delay difference between the signals from each launching tower, calculating the pseudo-range difference, and positioning the receiver by using a hyperbola intersection point. The method is compatible with the conventional terrestrial digital television system to the utmost extent, and has a high positioning accuracy.

Description

technical field [0001] The invention relates to the technical field of wireless transmission, in particular to a time-frequency two-dimensional joint positioning method and system based on China's terrestrial digital television single frequency network. Background technique [0002] There are currently existing means of navigation and positioning using satellites, such as the Global Positioning System (Global Positioning System, GPS) of the United States, and those that have been successfully developed and put into use or are being developed, such as the Russian Global Navigation Satellite System (GLOBAL NAVIGATION SATELLITE SYSTE, GLONASS), the European Union's Galileo global positioning system (GALILEO), and China's Beidou satellite navigation system. Among them, the GPS system of the United States is the most common and mature of the global positioning systems. The system lasted 16 years and cost 13 billion US dollars to build, and it is composed of 24 satellites. Many c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/14G01S5/12
Inventor 王昭诚张彧计晓媛戴凌龙
Owner TSINGHUA UNIV
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