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

A decoding device and low power consumption technology, applied in the field of decoding devices, can solve the problems of increased hardware overhead, consumption, and high decoding complexity, and achieve the effects of reducing dynamic power consumption, reducing power consumption, and reducing leakage power consumption

Inactive Publication Date: 2012-01-11
SHANGHAI HUAHONG INTEGRATED CIRCUIT
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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 implementati

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

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[0038] specific implementation plan

[0039] The content provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] figure 1 It is a circuit structure diagram of the low-power LDPC decoding device of the present invention, and the whole decoding device is composed of an LDPC decoder, a power control unit and a control register unit. The LDPC decoder includes an initialization unit, an iterative decoding unit, a decoding output unit and a decoding control unit. The LDPC decoder realizes the decoding function of the LDPC code in the CMMB baseband chip, including two states of decoding state and sleep state.

[0041] The initialization unit completes the work of information initialization in the LDPC decoding algorithm. The iterative decoding unit calculates the extrinsic information from the check node to the variable node and the extrinsic information from the variable node to the check node, calculates the pos...

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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...

Claims

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Application Information

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IPC IPC(8): H04W52/02
CPCY02B60/50Y02D30/70
Inventor 李刚
Owner SHANGHAI HUAHONG INTEGRATED CIRCUIT
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