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Blind Decision Feedback Frequency Domain Equalization Method with Variable Tap Length for Underwater Acoustic Communication

A technology of tap length and frequency domain equalization, which is applied to the shaping network, digital transmission system, baseband system components and other directions in the transmitter/receiver, and can solve the problem of inability to choose and so on.

Active Publication Date: 2022-07-01
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing blind frequency domain equalization is fixed tap length equalization, and it is impossible to select the optimal tap length for different underwater acoustic channel envelopes to obtain optimal performance.

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  • Blind Decision Feedback Frequency Domain Equalization Method with Variable Tap Length for Underwater Acoustic Communication
  • Blind Decision Feedback Frequency Domain Equalization Method with Variable Tap Length for Underwater Acoustic Communication
  • Blind Decision Feedback Frequency Domain Equalization Method with Variable Tap Length for Underwater Acoustic Communication

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Embodiment Construction

[0072] The present invention will be further described below in conjunction with the accompanying drawings.

[0073] Aiming at the problem of different envelopes of underwater acoustic channels, the present invention proposes a variable tap length blind decision feedback frequency domain equalization algorithm. The scheme can dynamically adjust the frequency domain tap length according to the specific channel envelope to achieve better equalization performance, thereby effectively improving the link reliability of underwater acoustic communication.

[0074] The system model is attached figure 1 where c(n) is the source signal, s(n) is modulated by the modulator to obtain the modulated signal s(n), and h(n) is the impulse response of the underwater acoustic channel, which is obtained by the BELLHOP model. After s(n) passes through the underwater acoustic channel, the received signal g(n) at the receiving end is obtained, that is, the input signal of the equalizer, that is, for...

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Abstract

The invention relates to the technical field of underwater acoustic communication, in particular to a water-oriented water-oriented technology that can dynamically adjust the frequency domain tap length according to a specific channel envelope to achieve better equalization performance, thereby effectively improving the link reliability of underwater acoustic communication. Blind decision feedback frequency domain equalization algorithm with variable tap length for acoustic communication. Firstly, the blind decision feedback frequency domain equalization is studied, and the advantages of blind decision feedback frequency domain equalization are verified by simulation. On this basis, the variable tap length blind decision feedback is studied. Frequency domain equalization, simulation results verify that the variable tap algorithm can dynamically adjust the frequency domain filter tap length according to different channel envelopes, and prove the advantage of blind decision feedback frequency domain equalization in bit error performance.

Description

Technical field: [0001] The invention relates to the technical field of underwater acoustic communication, in particular to a water-oriented water-oriented technology that can dynamically adjust the frequency domain tap length according to a specific channel envelope to achieve better equalization performance, thereby effectively improving the link reliability of underwater acoustic communication. Variable tap length blind decision feedback frequency-domain equalization algorithm for acoustic communication. Background technique: [0002] The ocean contains a variety of rich resources, and human beings continue to increase their development efforts, which is inseparable from the support of underwater acoustic communication technology. The underwater acoustic channel has many problems, such as serious multi-path phenomenon, time-varying and limited bandwidth resources. Therefore, it is of great significance to effectively deal with these problems to ensure the reliability of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04B13/02
CPCH04L25/03159H04B13/02H04L2025/03522H04L2025/0349
Inventor 刘志勇谭周美李博
Owner HARBIN INST OF TECH AT WEIHAI