Storage method for Viterbi decoder survival path in wireless sensor network node

A wireless sensor and surviving path technology, applied in transmission systems, energy-saving ICT, digital transmission systems, etc., can solve the problem of high circuit power consumption, and achieve the effect of reducing circuit power consumption and reducing switching activity

Inactive Publication Date: 2011-08-24
JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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Problems solved by technology

from figure 2 It can be seen that although at time t=11, the decoding result can be read from the survival path (00100101101) saved by the state S0 register, but since almost all state registers will be flipped and shifted due to the update path every clock, lead to high circuit power consumption

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  • Storage method for Viterbi decoder survival path in wireless sensor network node
  • Storage method for Viterbi decoder survival path in wireless sensor network node
  • Storage method for Viterbi decoder survival path in wireless sensor network node

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Embodiment Construction

[0017] The present invention and its effects will be further described below in conjunction with the embodiments and accompanying drawings.

[0018] The present invention can be divided into following steps in concrete implementation process:

[0019] Step 1. The register pointer is introduced on the basis of the traditional register exchange structure. The corresponding relationship between the state and the path is realized through the register pointer. The register pointer always points to the state corresponding to the current storage path of the register. The physical address of the register and the physical address of the register always maintain a one-to-one correspondence. For example, a certain register pointer changes from P0 to P2, which indicates that the register that saved the path of state S0 at the previous moment becomes the path of saving state S2 at the current moment.

[0020] Step 2. Solve the pointer attribution problem. In the decoding process, when t...

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Abstract

The invention discloses a Viterbi encoder survival route storage method used for wireless sensor network nodes. The method is as follows: based on a register exchange structure, a register only needs to write a judging bit into the appointed position of an identification signal by setting a special register pointer when the register refreshes the stored content, instead of whole duplication and displacement operation; in addition, the register pointer also plays a role of keeping the consistency of a survival route and the state. The method can decrease the power consumption of a circuit and can be used for the energy-limited decoding of convolutional codes of wireless sensor network nodes.

Description

technical field [0001] The invention relates to a Viterbi decoder surviving path storage technology, in particular to a Viterbi decoder surviving path storage method for wireless sensor network nodes. Background technique [0002] At present, the application prospects of wireless sensor networks in military, environmental monitoring, medical and health, industrial automation, public safety, etc. are generally affirmed. As a sensor network carrier, the nodes are usually powered by batteries, but because the nodes generally work in the wild environment, it is inconvenient to charge or replace the batteries, so there is a problem of energy limitation, which requires that the power consumption of the node circuit should be as low as possible. In addition, when the nodes work in harsh environments, channel convolutional coding can improve the reliability of data transmission, and when decoding convolutional codes, Viterbi decoding algorithms based on maximum likelihood decoding a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H03M13/41H04L29/08
CPCY02B60/50
Inventor 高丹沈杰刘海涛
Owner JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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