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Channel interleaving method and system in hand TV system

A channel interleaving, TV system technology, applied in pulse modulation TV signal transmission, frequency division multiplexing system, electrical components and other directions, can solve problems such as being unsuitable for mobile transmission and reducing system bit error rate

Inactive Publication Date: 2007-10-03
HUAWEI TECH CO LTD
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Problems solved by technology

[0015] The purpose of the present invention is to provide a channel interleaving method in a handheld TV system, aiming to solve the problem that the existing national terrestrial digital TV frame structure is not suitable for mobile transmission, so as to provide a framing structure in the original data frame structure Realize time-sliced ​​transmission of handheld TV services, and realize interleaving between LDPC coded blocks and constellation point interleaving mapping based on the framing structure, reducing the bit error rate of the system

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  • Channel interleaving method and system in hand TV system

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Embodiment Construction

[0077] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0078] The invention adds a frame structure on the basis of the frame structure of the national terrestrial digital television to realize the time-sliced ​​transmission of data, and uses the frame as the minimum unit for data transmission, reception and carrying program information. At the same time, for the framing structure, subcarrier interleaving is performed between OFFDM symbols within the time slice to better utilize the effects of time diversity and frequency diversity and effectively reduce the bit error rate of data.

[0079] In the present invention, a super frame is composed of several ...

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Abstract

This invention provides a channel interlacing method and a system in a handheld TV system, in which, the method includes: A, carrying out LDPC coding to input signal source bit streams to output LDPC coding blocks, B, carrying out bit interlacing among the blocks of LDPC, C, carrying out constellation mapping to the interlaced bits to generate constellation points, D, interlacing and mapping the points onto a time frequency plane of a multi-frame including multiple data frames to get an even better time diversity result , at the same time, bit information in a LDPC coding block can be scattered to irrelated data subcarriers by interlacing among LDPC coding blocks and interlaced mapping of constellation and different modulation steps can be processed together.

Description

technical field [0001] The invention belongs to the field of handheld television, in particular to a channel interleaving method and system in a handheld television system. Background technique [0002] Handheld TV is to watch TV programs through mobile terminals, that is, to realize streaming media and other data services through mobile networks, which can greatly enrich people's daily life and information exchange. Mobile terminals include various handheld terminals such as vehicle-mounted devices and notebook computers. [0003] At present, there are mainly three types of network systems for realizing handheld TV services: [0004] (1) Based on traditional mobile communication networks, such as Code Division Multiple Access (CDMA), GSM Evolution Enhanced Data Rates (Enhanced Data rates for GSM Evolution, EDGE), General Packet Radio Service (General Packet Radio Service, GPRS ) and other unicast systems; [0005] (2) Unicast or broadcast systems based on satellite syste...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04J1/00
Inventor 吴更石吴绍权李峰
Owner HUAWEI TECH CO LTD
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