Encoder convenient for LDPC long code implementation on FPGA and encoding method

Abstract

The invention relates to a coder for conveniently implementing a LDPC long code in an FPGA and a coding method. A LDPC coding module receives uncoded data output from a ping-pong buffer group input module and a check matrix output from a Synchronous Dynamic Random Access Memory (SDRAM) check matrix group module, obtains a parity matrix check code after a coding operation, outputs the code to a coding output buffer module for a code rate match, transmits the matched parity matrix check code with a certain length to an interleaving module in the LDPC for a bit combination and a bit interleave and outputs the interleaved coding data. The technical scheme of the invention has advantages of less hardware source, low design complexity, high operation frequency, easy implementation and high reliability, and flexibly implements different application environment demands according to the actual utilization demands and the hardware source conditions.

Description

technical field [0001] The invention relates to the field of satellite digital multimedia broadcasting, in particular to an encoder and an encoding method that facilitate the realization of LDPC long codes in FPGA. Background technique [0002] Digital broadcasting has the characteristics of wide coverage and large signal capacity. Therefore, as an important part of the information and communication industry, it plays an important role in the construction of national information infrastructure, the realization of universal services and the national information security strategy. [0003] In broadcast channel transmission, the transmission medium and other signal sources will introduce a series of influences to the signal, and the signal will experience fading, distortion and interference, etc., resulting in bit errors. Through channel coding and interleaving, the bit error rate can be greatly reduced. [0004] In the current mobile multimedia broadcasting system, the video s...

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Problems solved by technology

[0006] The Chinese patent "A Channel Coding and Interleaving Method in Mobile Multimedia Broadcasting" (Patent No. 200610149782.0) provides some algorithmic descriptions of the advantages of the LDPC algorithm in the communication field and some descriptions related to the specific application environment. It illustrates the importance and implementation complexity of LDPC in channel coding, but this patent makes a highly complex and structured design of the LDPC parity check matrix, which makes it difficult to implement and popularize

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