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A signal synchronization method based on Dual-Zadoff-Chu sequence in underwater acoustic OFDM communication is presented

A signal synchronization and sequence technology, applied in the field of underwater acoustic OFDM communication, can solve the problem of no explicit solution, and achieve the effect of reducing the computational complexity

Active Publication Date: 2018-12-28
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0010] In the prior art, high-precision Doppler extension estimation mostly uses search-based methods without explicit solution

Method used

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  • A signal synchronization method based on Dual-Zadoff-Chu sequence in underwater acoustic OFDM communication is presented
  • A signal synchronization method based on Dual-Zadoff-Chu sequence in underwater acoustic OFDM communication is presented
  • A signal synchronization method based on Dual-Zadoff-Chu sequence in underwater acoustic OFDM communication is presented

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Embodiment Construction

[0064] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

[0065] In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are shown arbitrarily, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of parts is appropriately exaggerated in some places in the drawings.

[0066] In this embodiment, we use two underwater autonomous vehicles (Autonomous Underwater Vehicle, AUV) as the experimental platf...

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Abstract

The invention discloses an underwater acoustic OFDM communication method based on Dual-Zadoff. The invention relates to a signal synchronization method of a Chu sequence, which relates to the field ofunderwater acoustic OFDM communication, comprising a transmitter and a receiver, wherein the transmitter sends a preamble with a length of 2N, and the preamble is composed of two Dual codes with thesame length of N; ZC sequence in series, Dual-ZC sequence is composed of two ZC sequences with N length, same parameter setting and g (0 (g (N)) frequency difference. The receiver can simultaneously complete signal synchronization, Doppler spread estimation, channel estimation and other tasks through the corresponding receiving steps.

Description

technical field [0001] The invention relates to the field of underwater acoustic OFDM communication, in particular to a signal synchronization method based on Dual-Zadoff-Chu sequence in underwater acoustic OFDM communication. Background technique [0002] The application of OFDM (orthogonal frequency division multiplexing technology) in land communication has achieved great success. At the same time, OFDM-based research in the field of underwater acoustic communication has also been widely carried out. Signal synchronization is a very important field in communication. Generally speaking, signal synchronization is mainly divided into two aspects: timing synchronization and frequency synchronization. Timing synchronization mainly means that the receiver detects the arrival of the signal and estimates a more accurate clock offset. Frequency synchronization mainly refers to estimating the parameters related to the Doppler spread equal to the Doppler spread effect, and compensa...

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Application Information

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IPC IPC(8): H04L25/02H04L27/26H04B13/02H04J13/00
CPCH04B13/02H04J13/0062H04L25/0224H04L27/2692
Inventor 王易因李一辰关新平
Owner SHANGHAI JIAO TONG UNIV
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