Underwater anti-interference transmission method based on prime digital interleaving and spinal cord coding

A transmission method and prime number technology, applied in the field of underwater anti-jamming transmission, can solve the problems of too simple design and unsatisfactory anti-jamming.

Active Publication Date: 2019-07-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the existing interleaving technology can significantly reduce the complexity, the anti-interference effect is not ideal because the design is too simple

Method used

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  • Underwater anti-interference transmission method based on prime digital interleaving and spinal cord coding
  • Underwater anti-interference transmission method based on prime digital interleaving and spinal cord coding
  • Underwater anti-interference transmission method based on prime digital interleaving and spinal cord coding

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Experimental program
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Effect test

Embodiment 1

[0103] figure 1 It is a schematic diagram of the structure and connection relationship of the anti-jamming transmission system based on the underwater anti-jamming transmission method based on prime-code interleaving and spinal code coding in the present invention.

[0104] From figure 1 It can be seen that the underwater anti-jamming transmission system relied on includes a system parameter initialization module, a sending signal processing module, an interleaving parameter control unit, a time-varying underwater acoustic channel module, and a receiving signal processing module; the sending signal processing module also includes a source An interleaving unit, a check unit, a spinal encoding unit, a channel interleaving unit, and a modulation unit; the received signal processing module includes a demodulation unit, a channel deinterleaving unit, a spinal decoding unit, a dechecking unit, and a source deinterleaving unit;

[0105] The time-varying underwater acoustic channel m...

Embodiment 2

[0177] Figure 4 It is a schematic diagram of the system composition and connection when the OFDM modulation mode is used in the actual implementation of an underwater anti-interference transmission method based on prime-code interleaving and spinal code coding.

[0178] The underwater acoustic channel is a complex time-varying fading channel, which has the characteristics of low frequency utilization and serious multipath interference. In order to make the underwater acoustic communication system have better bandwidth utilization, improve the system Multipath interference, so the Orthogonal Frequency Division Multiplexing (OFDM) technology is applied to the research of underwater communication. Orthogonal Frequency Division Multiplexing (OFDM) technology converts the frequency-selective fading caused by the channel into flat fading through multi-carrier modulation technology, and overcomes multipath interference; it also overcomes inter-symbol interference (ISI) by adding a c...

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Abstract

The invention relates to an underwater anti-interference transmission method based on prime digital interleaving and spinal cord coding, and belongs to the technical field of wireless communication coding and interleaving. The underwater anti-interference transmission method comprises: information bits to be transmitted being sequentially subjected to signal source interleaving and then verified;then, carrying out Spinal channel coding and channel interleaving; and finally, sending the signal to an underwater acoustic time-varying channel through OFDM modulation and up-conversion; the received signal processing module receiving the transmitted signals and sequentially performing demodulation and channel de-interleaving; and carrying out Spinal decoding and de-check, and finally, carryingout signal source de-interleaving to output recovered information bits. The method has the characteristics that the realization is flexible and the matrix dimension does not need to be considered deliberately. The bit error rate is effectively reduced. In addition, Spinal short code coding is adopted as channel coding, and compared with other channel coding, the complexity is relatively low. Underthe condition that the complexity is not increased or even reduced, the series connection error is greatly improved, and burst interference can be coped with.

Description

technical field [0001] The invention relates to an underwater anti-jamming transmission method based on prime number interleaving and spinal code encoding, and belongs to the technical field of wireless communication encoding and interleaving. Background technique [0002] With the rapid development of various marine development projects such as the exploration of seabed resources and the monitoring of the marine environment, the demand for transmission of various data information using underwater acoustic channels and underwater acoustic communication systems has greatly increased. The underwater acoustic channel has the characteristics of high environmental noise and large transmission loss, which greatly limits the transmission efficiency and performance of underwater acoustic signals. [0003] Spinal codes, also known as rateless spinal codes, were first proposed by Jonathan Perry et al. in 2011. Spinal codes have been proven to approach Shannon's tolerance in binary sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B13/02
CPCH04B13/02H04L1/0003H04L1/0009H04L1/0015H04L1/0061H04L1/0071
Inventor 卢继华冯立辉王欢王震
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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