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Emission diversity device compatible with digital terrestrial multimedia broadcast (DTMB) system and data processing method thereof

A technology of transmit diversity and processing modules, applied in the field of transmit diversity devices compatible with DTMB systems, can solve the problems of inability to obtain reception performance, inability to meet multimedia services, etc., and achieve the effect of high reception reliability

Inactive Publication Date: 2012-01-18
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

The shortcomings of the transmitting device of the existing DTMB system are: under the multi-path propagation channel, it is impossible to obtain more reliable receiving performance; it cannot meet the current growing demand for multimedia services

Method used

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  • Emission diversity device compatible with digital terrestrial multimedia broadcast (DTMB) system and data processing method thereof
  • Emission diversity device compatible with digital terrestrial multimedia broadcast (DTMB) system and data processing method thereof
  • Emission diversity device compatible with digital terrestrial multimedia broadcast (DTMB) system and data processing method thereof

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Embodiment Construction

[0026] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and any similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0027] Such as figure 1 As shown, a transmit diversity device compatible with a DTMB system provided by an embodiment of the present invention includes a data randomization module, a forward error correction coding module, a mapping and interleaving module, a multiplexing module, a system information module, and a frame body processing module , frame adaptation module, baseband post-processing module, up-conversion module, frame header module;

[0028] The system information module and the frame header module each have an output end, the data randomization module, the forward error correction coding module, and the mapping an...

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Abstract

The invention discloses an emission diversity device compatible with a digital terrestrial multimedia broadcast (DTMB) system and a data processing method thereof, which relate to the technical field of digital television, and aim to solve the technical problem of improving the receiving reliability in a multi-path transmission environment. A frame header module in the device outputs frame headers in two structures, a multi-input single-output (MISO) processing module processes the input data in two paths; a first path is processed according to a traditional DTMB method and forms a signal frame with a first frame header output by the frame header module, then is converted into a radio frequency signal sequentially through a base band post-processing module and an upper variable frequency module, and is transmitted from a radio frequency output antenna; and a second path first carries out improving Alamouti coding to the input data, then carries out inverse fast fourier transform (IFFT) and forms a frame body through a frame body processing module, forms the signal frame with a second frame head input by the frame header module, and then is converted into the radio frequency signal sequentially through the base band post-processing module and the upper variable frequency module and is transmitted through the other radio frequency output antenna. The device and the method provided by the invention have backward compatibility.

Description

technical field [0001] The invention relates to digital television technology, in particular to a technology compatible with a DTMB system transmit diversity device and a data processing method thereof. Background technique [0002] The traditional OFDM system inserts a cyclic prefix (CP) between different symbols, which can effectively combat multipath channels and simplify equalization processing. When too long channel delay multipath occurs, the length of the required CP is longer. In addition, a large number of pilot insertion data frames are required for system synchronization and channel estimation, and these overheads will greatly reduce the data efficiency of the system. TDS-OFDM (time domain synchronous OFDM: Time Domain Synchronous Orthogonal Frequency Division Multiplexing) system is the core technology of China's national DTMB (digital television terrestrial multimedia broadcasting: digital television terrestrial multimedia broadcasting) standard. The frame str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L1/00H04L27/36H04B7/06
Inventor 李素月熊箭归琳刘勃
Owner SHANGHAI JIAO TONG UNIV
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