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LDPC (low density parity check) decoding device capable of reducing power consumption and implementation method of LDPC decoding device

The technology of a decoding device and implementation method, which is applied in the field of decoding devices, can solve the problems of hardware overhead LDPC code increase, large computing unit and storage unit, consumption, etc., and achieve the effect of reducing power consumption

Inactive Publication Date: 2012-07-25
SHANGHAI HUAHONG INTEGRATED CIRCUIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0019] 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

Method used

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  • LDPC (low density parity check) decoding device capable of reducing power consumption and implementation method of LDPC decoding device
  • LDPC (low density parity check) decoding device capable of reducing power consumption and implementation method of LDPC decoding device
  • LDPC (low density parity check) decoding device capable of reducing power consumption and implementation method of LDPC decoding device

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Embodiment Construction

[0038] Below in conjunction with each accompanying drawing, the content that the present invention proposes is described in detail: figure 1 is the circuit structure diagram of the decoding device, figure 2 A flowchart of the method for its implementation.

[0039] When the decoder is in the effective enabling state, it includes two states: the decoding state and the idle state. The decoder implements the decoding function of the LDPC code in the CMMB baseband chip. According to the decoding state and idle state, the decoder gives a dynamic voltage setting signal in real time.

[0040] The decoder 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 posterior probability and decodes the decision. The decoding output unit is used to jud...

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Abstract

The invention provides an LDPC (Low Density Parity Check) decoding device capable of reducing power consumption. The LDPC decoding device is composed of a power management unit and a decoder. According to the LDPC decoding device, the implementation method of adjusting power supply voltage by using a dynamic voltage setting signal is adopted, and the power consumption of the decoder is reduced on the premise that the data throughput rate of the system and the decoding performance are guaranteed. The invention also provides an implementation method of the LDPC decoding device capable of reducing the power consumption. With the adoption of the decoding device and the implementation method, the power consumption of the decoder is effectively reduced, therefore, the power consumption of a baseband receiving chip of a CMMB (China Mobile Multimedia Broadcasting) receiver can be reduced, and the application requirements can be met.

Description

technical field [0001] The invention designs a decoding device and a realization method of a CMMB receiver chip in the communication field, and in particular relates to an LDPC decoding device and a realization method capable of reducing power consumption. Background technique [0002] The China Digital Mobile Multimedia Broadcasting (CMMB for short) standard is the China Mobile Multimedia Broadcasting industry standard promulgated by the State Administration of Radio, Film and Television of China in October 2006. The CMMB standard fully takes into account the characteristics of mobile multimedia broadcasting services and requires high receiver sensitivity for handheld devices. The characteristics of mobility and battery power supply, the use of the most advanced low-density parity-check code (LDPC) channel error correction code, improve the anti-interference ability and support for mobility. [0003] LDPC code is a channel codec method with excellent performance that can ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/11H04L1/00
Inventor 李刚
Owner SHANGHAI HUAHONG INTEGRATED CIRCUIT