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A Sea Wave Masking Method for Signal Propagation in Maritime Wireless Sensor Networks

A wireless sensor and network signal technology, applied in wireless communication, network topology, radio wave measurement system, etc., can solve problems such as channel congestion, slow transmission rate, and network instability

Active Publication Date: 2019-07-02
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] In the maritime wireless sensor network system, due to the instability of the network, the transmission rate is slow and the channel is relatively congested

Method used

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  • A Sea Wave Masking Method for Signal Propagation in Maritime Wireless Sensor Networks
  • A Sea Wave Masking Method for Signal Propagation in Maritime Wireless Sensor Networks
  • A Sea Wave Masking Method for Signal Propagation in Maritime Wireless Sensor Networks

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Embodiment Construction

[0035] The following combination Figure 2 ~ Figure 3 , a preferred embodiment of the present invention is described in detail.

[0036] The wave shading method refers to the method that in the wireless sensor network system, when the node height changes, the signal propagation intensity is affected by the wave shading and changes accordingly.

[0037] First, the simplest linear model is used to interpolate the change of signal propagation affected by wave shadowing after the node height changes. It is found by interpolation that for the masking factor error X σ According to the node height h, reverse deduction is carried out to describe the change of the signal to a certain extent. However, when the position close to the sea surface changes, there is a certain error between the change of the signal strength and the change of the estimated value of the linear interpolation. By analyzing the ellipsoid model of signal propagation, we believe that the change of the signal chan...

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Abstract

The invention relates to an ocean wave shielding model of network signal transmission of a wireless sensor on the sea. The model is used for calculating corresponding change of signal transmission intensity affected by ocean wave shielding after the node height changes. Size of a shielding factor Xsigma error is determined based on the node height h. The invention comprises following steps of S1: determining the relation between the shielding factor error Xsigma and the node height h; S2: via weight series function weighing of link space shielding regions, calculating a relation function lambda between the shielding factor error Xsigma and the node height h; and S3: according to the relation function lambda between the e shielding factor error Xsigma and the node height h, obtaining the ocean wave shielding model of ellipsoid size weighing. According to the invention, the shielding factor error is determined based on the node height, so accuracy of signal transmission measurement in the wireless sensor network on the sea is effectively improved and positioning efficiency is increased.

Description

technical field [0001] The invention relates to a sea wave shielding method, in particular to a sea wave shielding method for signal propagation of a wireless sensor network at sea. Background technique [0002] Radio Frequency (RF) signals between wireless sensor network nodes are used to detect objects between node links, and can also be used to calculate the distance between nodes. The free space of radio frequency signal propagation refers to the infinite space through which the signal propagates. In the actual propagation process of radio waves, if the communication conditions within the first Fresnel radius can meet the propagation conditions in free space, then It can be considered that radio waves propagate in free space, and the free space model is an ideal signal loss model. [0003] Under the communication conditions of outdoor and open environments such as the sea, the transmitting node and the receiving node form a communication link, and it can usually be cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/391H04B17/318H04W64/00G01S5/02
CPCG01S5/0252H04B17/318H04B17/3911H04W64/003H04W84/18
Inventor 吴华锋王维军
Owner SHANGHAI MARITIME UNIVERSITY