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High-speed parallel RS encoder and encoding method for consultative committee for space data system (CCSDS) system

An encoding method and encoder technology, which is applied in the field of space data communication, can solve problems such as large amount of calculation, and achieve the effects of low amount of calculation, easy implementation, and reduced implementation complexity

Active Publication Date: 2013-05-22
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 repeated radical transformation process of the conventional parallel RS coding method has brought the disadvantage of large amount of calculation

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  • High-speed parallel RS encoder and encoding method for consultative committee for space data system (CCSDS) system
  • High-speed parallel RS encoder and encoding method for consultative committee for space data system (CCSDS) system
  • High-speed parallel RS encoder and encoding method for consultative committee for space data system (CCSDS) system

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Embodiment Construction

[0014] 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.

[0015] The structure of a conventional 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 implementation complexity depends largely on the finite field multiplier. Existing techniques convert finite field multiplication to finding the coefficient g i The constant coefficient matrix V(g i ).

[0016] Parallel RS encoding in CCSDS system adopts conventional parallel RS encoder, but base transformation is required before and after encoding, such as image 3 As shown, the information byte is transformed into a polynomial basis {1,α,…,α by dual basis representation before input 7}, the codewords generated after RS ​​encoding are converted from polynomial basis representations to dual basis representa...

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Abstract

The invention provides a high-speed parallel RS encoding scheme for a consultative committee for space data system (CCSDS). The high-speed parallel RS encoder and an encoding method for the CCSDS are characterized in that the encoder is mainly composed of a finite field multiplying unit, a finite field adding device and a shifting register. Change of base is synthesized to a constant coefficient matrix of the finite field multiplying unit, a correctional coefficient matrix is produced, and the process of change of base is removed. The high-speed parallel RS encoder and the encoding method for the CCSDS has the advantages of being low in calculated amount, easy to achieve, capable of effectively reducing calculated amount of encoding and achieving complexity, and capable of improving encoding speed.

Description

technical field [0001] The invention relates to the field of space data communication, in particular to a high-speed parallel RS encoder and an encoding method of a CCSDS 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] CCSDS recommends using finite field GF(2 8 ) on the (255,k) system RS code, the RS code length is n=255 bytes, and there are two code rates, k=223 and k=239 respectively. CCSDS recommends two RS code encoding methods, such as figure 1 As shown, one is the Berlekamp serial encoding method. For high-speed applications, the Berlekamp serial encoding method is difficult to meet the design requirements; the other is the conventional encoding method. The conventional encoding method often uses a conventional parallel encoder. Base transformation is required ...

Claims

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Application Information

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IPC IPC(8): H03M13/15
Inventor 张鹏蒋蓝祥蔡超时刘蕾林子良
Owner 苏州威士达信息科技有限公司
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