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Generating device and method of constant coefficient matrix in reed-solomon (RS) code of digital video broadcasting-terrestrial (DVB-T) system

A DVB-T and generation device technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems of slow generation of constant coefficient matrix and large amount of calculation, etc., and achieve easy implementation, low calculation amount, and improved generation speed effect

Inactive Publication Date: 2013-05-08
苏州威士达信息科技有限公司
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Problems solved by technology

It can be seen that the existing method of constructing the multiplier matrix has a large amount of calculation, which brings the disadvantage of slow generation of constant coefficient matrix

Method used

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  • Generating device and method of constant coefficient matrix in reed-solomon (RS) code of digital video broadcasting-terrestrial (DVB-T) system
  • Generating device and method of constant coefficient matrix in reed-solomon (RS) code of digital video broadcasting-terrestrial (DVB-T) system
  • Generating device and method of constant coefficient matrix in reed-solomon (RS) code of digital video broadcasting-terrestrial (DVB-T) system

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0016] The calculations in the RS encoder are all done in the Galois field, and the Galois field GF(2 m ) in any element Q can use the basis {1,α,…,α m-1}={γ 0 ,γ 1 ,…, γ m-1}, we call this basis a canonical basis. Usually with {γ 0 ,γ 1 ,…, γ m-1} to represent GF(2 m ) on the canonical basis. If another set of basis {τ 0 ,τ 1 ,…,τ m-1}satisfy:

[0017] Tr ( γ i τ j ) = δ ( i , j ) = 1 i = j ...

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Abstract

The invention provides a generating scheme of a constant coefficient matrix in a reed-solomon (RS) code of a digital video broadcasting-terrestrial (DVB-T) system. The generating scheme is characterized in that the generating device of the constant coefficient matrix in the RS code of DVB-T system mainly consists of six parts of a controller, a domain element binary representation lookup table, a base transfer matrix storage, an anti-base transfer matrix storage, a multiplication unit and a storage unit. According to the generating device of the constant coefficient matrix in the RS code of DVB-T system, 896 times of multiplication and 784 times of addition are removed and the 896 times of the multiplication and the 784 times of the addition are involved in multiplier matrix construction. In terms of each generator polynomial coefficient, binary representation of corresponding 8 domain elements only need taking out from the domain element binary representation lookup table to construct a multiplier matrix of each generator polynomial coefficient, and then a constant coefficient matrix of each generator polynomial coefficient is generated. Then generating device of the constant coefficient matrix in the RS code of DVB-T system is low in calculated amount, easy to achieve and capable of improving the generation speed of the constant coefficient matrix obviously.

Description

technical field [0001] The invention relates to terrestrial digital television broadcasting (Digital Video Broadcasting-Terrestrial, DVB-T) technology, in particular to a method for generating constant coefficient matrix in RS coding of DVB-T system. Background technique [0002] Reed-Solomon (Reed-Solomon, RS) code is a kind of multi-ary BCH code with strong error correction ability. It can correct both random and burst errors. In modern communication systems has been widely applied. [0003] The DVB-T system uses concatenated codes, the inner code is a convolutional code, and the outer code is a finite field GF(2 8 ) on (204,188) systematically shortened RS codes. figure 1 The generator polynomial coefficient g of the RS(204,188) code is given i (0≤i<16), g i Expressed in power notation. [0004] The structure of the parallel RS encoder is as figure 2 As shown, it is mainly composed of a shift register, a finite field adder and a finite field multiplier, and its ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 张鹏周德扬陈晋伦刘蕾林子良
Owner 苏州威士达信息科技有限公司
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