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Diversity receiving terminal and receiving method for digital television single frequency network

A technology of digital TV reception and diversity reception, which is applied to color TV parts, TV system parts, TVs, etc., can solve problems such as large delays, reduce errors, and improve receiving sensitivity

Inactive Publication Date: 2007-11-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the special application environment of single-frequency networking of rail transit (the coverage area is linearly distributed and widely distributed), and the coverage method of directional antennas is used in the opposite direction, if the US Patent No. 4271525 is used Diversity reception or other methods in the known prior art are equivalent to man-made multi-path interference (0dB multi-path interference) that needs to be dealt with in a large coverage area, and the delay between multi-path may be very large

Method used

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  • Diversity receiving terminal and receiving method for digital television single frequency network
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  • Diversity receiving terminal and receiving method for digital television single frequency network

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Embodiment Construction

[0035] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0036] As shown in FIG. 1 , the diversity receiving terminal of the digital TV single frequency network of the embodiment of the present invention is composed of the following components: a plurality of directional antennas 31 capable of receiving TV broadcast frequency band signals. Choose according to the coverage environment and requirements. The selection principle is to make the signal strength received by at least one antenna exceed the receiving threshold. In the special application environment of the rail transit single frequency network, the coverage area is ...

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Abstract

A diversity-receiving terminal of digital TV single-frequency network consists of multiple directional antenna enabling to receive TV broadcast band signal, multiple receiving-component enabling to independently receive TV broadcast signal and enabling to generate different diversity indication signal according to different diversity selection principle, a diversity selection component for carrying out diversity selection according to different diversity combination algorithm and a video decoding component.

Description

technical field [0001] The invention relates to a receiving terminal and a receiving method in the field of information technology, in particular to a diversity receiving terminal and a receiving method of a digital television single frequency network based on a plurality of diversity selection principles using multiple directional receiving antennas. Background technique [0002] With the rapid development of digital technology, the field of broadcasting and television is facing a new revolution. At present, there are mainly three types of network architectures that can provide multimedia content to a large number of viewers in a mobile environment: mobile communication network (2.5 / 3G); wireless local area network (WLAN); terrestrial digital broadcasting network. Due to the multipath and time-varying characteristics of the wireless fading channel, the signal transmitted through it may be severely attenuated at the receiving end. Compared with an ideal channel without fadi...

Claims

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Application Information

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IPC IPC(8): H04N5/44H04N5/46H04N5/00H04N7/26H04N21/41
Inventor 归琳施洋马文峰袁锐王喆
Owner SHANGHAI JIAO TONG UNIV
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