Marine linear sensor array data compression method based on discrete cosine transformation

A technology of discrete cosine transform and sensor array, which is applied in the field of marine communication, can solve the problems of weak data compression capability, redundant data transmission, and low transmission efficiency, and achieve the effects of simple implementation, high data transmission efficiency, and reduced transmission code length

Inactive Publication Date: 2014-05-21
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0010] The present invention provides a method for compressing data of a marine linear sensor array based on discrete cosine transform, which is used to solve the problem that existing maritime wireless sensor networks have weak compression capabilities for data to be transmitted, resulting in redundant transmission data and energy loss. The problem of high and low transmission efficiency

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  • Marine linear sensor array data compression method based on discrete cosine transformation
  • Marine linear sensor array data compression method based on discrete cosine transformation
  • Marine linear sensor array data compression method based on discrete cosine transformation

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Embodiment Construction

[0022] The present invention proposes a method for compressing ocean line sensor array data based on discrete cosine transform. The method converts a group of data into frequency data through discrete cosine transform before data transmission for the ocean route data collected by monitoring sensors, so as to know Intensity changes, and by quantizing and encoding the transformed array, eliminating information redundancy, effectively reducing the code length in data transmission, reducing the number of wireless transmissions, and effectively saving the transmission costs of the entire ocean route monitoring sensor network loss and energy loss.

[0023] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0024] Such as figure 1 Shown is a flow chart of a discrete cosine transform-based ocean line sensor array data...

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Abstract

The invention provides a marine linear sensor array data compression method based on discrete cosine transformation, and belongs to the field of marine communication. The method is used for solving the problems of redundant data transmission, high energy consumption and low transmission efficiency of an existing marine wireless sensing network. The method includes the steps: firstly, processing marine route data acquired by sensors at different depths in a current sensor array to obtain at least one row vector matrix; secondly, performing one-dimensional discrete cosine transformation for each row vector matrix; uniformly quantizing frequency coefficients of data in the row vector matrixes after the discrete cosine transformation; finally, performing Huffman coding for the data in the quantized row vector matrixes. By the method, data transmission code lengths and data transmission times can be greatly saved, and transmission cost and energy loss of a whole marine route monitoring sensor network are effectively saved.

Description

technical field [0001] The invention relates to the field of marine communication, in particular to a method for compressing data of a marine linear sensor array based on discrete cosine transform. Background technique [0002] With the development of ocean transportation, both the International Maritime Organization and the International Association of Navigational Lights are actively promoting the research work in the field of marine Internet of Things and electronic navigation (E-Navigation). The port is a necessary place for ships to dock, and the route is the necessary road to guide ships in and out of the port, reminding ships of the route to follow. At the same time, its monitoring function is also a guarantee for the safe entry and exit of ships. It can detect whether the current channel information is suitable for ships to enter, exit and berth, providing a reliable guarantee for the safety of shipping. [0003] The wireless sensor network is a wireless network com...

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Application Information

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IPC IPC(8): H03M7/30
Inventor 张中山皇甫伟李洋弓丞隆克平
Owner UNIV OF SCI & TECH BEIJING
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