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Parallel channel decoding apparatus applied in radio multimedia sensor network

A channel decoding and multimedia technology, which is applied in the field of transmission nodes of wireless multimedia sensor networks, can solve the problem of high working clock of a channel encoder, and achieve the effects of reducing working clock and improving throughput.

Inactive Publication Date: 2012-11-07
JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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AI Technical Summary

Problems solved by technology

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 decoding apparatus applied in radio multimedia sensor network
  • Parallel channel decoding apparatus applied in radio multimedia sensor network

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Such as figure 2 , image 3 and Figure 4 As shown, the present invention includes a parallel deinterleaver, an interpolator, a parallel viterbi decoder and a parallel-to-serial converter.

[0022] The parallel interleaver is connected with the demodulator, two RAMs of the same size, a write address generator and a read address generator.

[0023] The write address generator generates an address according to the sequence number of the input code stream and the format of the interleaving table, and at the same time gives a write enable signal. The highest bit of the address generated by the write address generator is used to generate the chip select signals of the two RAMs, and the remaining bits are used as the write addresses of the two RAMs. Taking the N*M interleaving table as an example, the generated write RAM address is addr=i*N+j, whe...

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Abstract

The invention discloses a decoding device of a parallel communication channel which is applied to a radio multimedia sensing network and comprises a parallel de-interleaving machine, a zero inserting device, a parallel viterbi code converter and a serial-to-parallel converter, the idea of splitting serial data into two ways of parallel data for the decoding operation of the communication channel is adopted, compared with a decoding device of a traditional communication channel, under the same working timepiece condition, the throughput of data is improved by one time through a mode of adding the viterbi code converter by the decoding device of the communication channel of the invention, under the same data rate condition, the working timepiece of the decoding device of the communication channel of the invention can be reduced by half, according to the energy consumption calculating formula of an integrated circuit, the working energy consumption of the decoding device of the communication channel of the invention is only one-fourth percent of the traditional communication channel decoding device, and the problem of energy limitation of the radio multimedia sensing network can be effectively released.

Description

technical field [0001] The present invention relates to a transmission node of a wireless multimedia sensor network based on OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) system, in particular to a channel decoding 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 monitoring 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 and the real physical world, profoundly changing the way of interaction between human and nature; it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L27/26
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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