Low-power-consumption low density parity check code (LDPC) decoding device in China mobile multimedia broadcasting (CMMB) receiving machine and implementation method thereof

Abstract

The invention provides a low-power-consumption low density parity check code (LDPC) decoding device in a China mobile multimedia broadcasting (CMMB) receiving machine, which consists of an LDPC decoder, a power supply control unit and a control register unit, wherein the LDPC decoder consists of an initialization unit, an iterative decoding unit, a decoding output unit and a decoding control unit, and the power supply control unit provides an electricity supply power supply for the LDPC decoder and controls the work state of the LDPC decoder, so the goal of saving dynamic and electricity leakage power consumption is reached. Simultaneously, the control register unit stores and provides the base band chip control information and the internal state information before the dormancy state of the LDPC decoder for the LDPC decoder. Simultaneously, the invention also provides an implementation method of the low-power-consumption LDPC decoding device. Through the device and the method, the decoder electricity leakage power consumption and the dynamic power consumption can be effectively reduced, so the power consumption of a receiving machine chip in the application can be reduced.

Description

technical field [0001] The present invention relates to a decoding device and its realization method, in particular to a low power consumption LDPC decoding device and its realization method in a CMMB receiver. Background technique [0002] The China Digital Mobile Multimedia Broadcasting ("CMMB" for short) standard is a Chinese mobile multimedia broadcasting industry standard promulgated by the State Administration of Radio, Film and Television of China in October 2006. The standard came into effect on November 1, 2006. The CMMB standard fully considers the characteristics of mobile multimedia broadcasting services, and adopts the most advanced LDPC (Low Density Parity Check Code) channel error correction codes to improve the anti-interference capabilities and support for mobility. [0003] LDPC code is a channel coding and decoding method that can approach Shannon's limit and has excellent performance. LDPC codes appeared in 1960 and received widespread attention 35 year...

AI Technical Summary

Problems solved by technology

[0020] The error correction performance of LDPC code is powerful, and its decoding complexity is relatively high.

From the perspective of hardware implementation, the LDPC decoder consumes a large number of computing units and storage units

And this hardware overhead will increase with the code length of the LDPC code

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