Code realizing system and method in multi-code mode

Abstract

The invention discloses a code realizing system in a multi-code mode. In the code realizing system, a check code word generation unit is used for generating check code words which correspond to the multi-code mode; a first multi-channel selection unit is used for selecting the check code words which correspond to a current code mode; a second multi-channel selection unit is used for sequentially selecting acquired information code words or the acquired check code words to be output as coding code words under the control of an information code word / check code word selection signal wire. The invention also discloses a code realizing method in the multi-code mode. The code realizing method comprises the following steps of: generating the check code words which correspond to the multi-code mode; selecting the check code words which correspond to the current code mode; and sequentially selecting the acquired information code words or the acquired check code words to be output as the coding code words. The code realizing system and method can be used for realizing the codes suitable for the multi-code mode.

Description

technical field [0001] The present invention relates to coding technology in the field of communication, in particular to a system and method for realizing RS coding of multiple coding modes in China Mobile Multimedia Broadcasting (CMMB, China Mobile Multimedia Broadcasting). Background technique [0002] The RS code is a linear block code, and its expression is RS(n, k), where n is the code word length and k is the information code length. RS code is a kind of BCH code with strong error correction ability, and it is also a kind of typical algebraic geometric code. It was first constructed by Reid and Solomon in 1960. In general applications, the RS code can be used alone as a single code; in applications with extremely harsh channel conditions, such as mobile communications, satellite communications and other channels with multipath fading characteristics, the RS code can also be used as an outer code to provide correction. The serial concatenated code with stronger error ...

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, RS encoders are often required to implement encoding functions of multiple encoding modes and lengths, and for different modes of RS encoding, they often correspond to completely different coefficients of the generator polynomial, that is, the coefficients of the multiplier coefficient, which makes it necessary to frequently change figure 1 The coefficient of the multiplier in the hardware implementation is very inconvenient for the design of the hardware and is not conducive to the expansion of the multi-encoding mode. Therefore, there is a new demand for an encoding solution suitable for the multi-encoding mode. At present, for this demand , no effective solution exists yet

Images