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Parallel channel encoding apparatus applicable in multimedia sensor network

A channel coding and multimedia technology, applied in the transmission node field of wireless multimedia sensor network, can solve the problem of high working clock, achieve the effect of reducing working clock and improving throughput

Inactive Publication Date: 2008-10-15
JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] What the present invention aims to solve is the problem that the channel coder working clock in the existing multimedia sensor node is relatively high

Method used

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  • Parallel channel encoding apparatus applicable in multimedia sensor network
  • Parallel channel encoding apparatus applicable in multimedia sensor network
  • Parallel channel encoding apparatus applicable in multimedia sensor network

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the drawings and embodiments;

[0024] Such as figure 2 , image 3 with Figure 4 As shown, the present invention includes at least a serial-to-parallel converter, a parallel convolutional encoder, a puncturer and a parallel interleaver.

[0025] The serial-to-parallel converter is connected to the output port of the source encoder, and splits the data into a two-way sequence according to the serial number of the input data, the odd-numbered data is given to the first channel, and the even-numbered data is given to the second channel. After serial-to-parallel conversion, the output data clock is reduced to half of the input data clock.

[0026] The parallel convolutional encoder is composed of a set of shift registers and a number of bit XOR operators. The shift register is connected to the serial-to-parallel converter, and each element of it consists of a two-bit storage space, which is used to store...

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Abstract

The invention discloses a parallel channel coding device applied to a wireless multimedia sensor network, which comprises a serial-parallel converter, a parallel convolution encoder, a puncher and a parallel interleaver. The device of the invention divides serial data into two rows of parallel data and carries out channel coding operation; compared with the traditional channel coding devices, the channel coding device of the invention doubles the throughput efficiency of data by the mode of slightly doubling the storage space of a shift register in the convolution encoder under the condition of the same working clock; under the condition of the same data rate, the working clock of the channel coding device of the invention can be halved and the working consumption of the channel coding device of the invention is only 1 / 4 of that of traditional channel coding devices according to the consumption calculation formula of integrated circuits, thereby effectively relieving the problem of energy constraint of wireless multimedia sensor networks.

Description

Technical field [0001] The invention relates to a transmission node of a wireless multimedia sensor network based on an OFDM (Orthogonal Frequency Division Multiplexing) system, in particular to a channel coding device therein. Background technique [0002] With the rapid development and maturity of communication technology, embedded computing technology and sensor technology, wireless sensor nodes with perception, computing and communication capabilities have begun to appear and have attracted great attention. Such wireless sensor nodes constitute a wireless sensor network that can coordinately perceive, collect and process various environmental or monitored object information in the network coverage area, and release it to users who need this information. The wireless sensor network integrates the logical information world with the real physical world, profoundly changing the way of interaction between man and nature; it can be widely used in military, industrial and agricultur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L12/28H03M13/27
CPCY02B60/50
Inventor 陈晨姜建施玉松万溢萍姜华刘海涛
Owner JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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