Reconstruction Method of Maritime Shortwave Frequency Data Based on Spatial Local Estimation
A local estimation and data reconstruction technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve problems affecting communication effects, low reference value of frequency data, and deterioration of electromagnetic environment, so as to shorten frequency selection time and improve Effect, data reconstruction accuracy and accurate effect
Inactive Publication Date: 2016-03-09
PLA DALIAN NAVAL ACADEMY
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The disadvantage is that it is necessary to transmit radio detection signals, which will easily cause the deterioration of the electromagnetic environment and affect the communication effect; when the detection system is inconsistent with the communication system, the reference value of the frequency data is not high
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[0014] Specific embodiments of the present invention will be described in detail below in conjunction with technical solutions.
[0015] Step 1: Use short-wave spectrum management equipment to collect sample data in the reconstructed area and check the quality of the sample data. The sample data elements are required to be complete. The data elements that must be included are: geographical location information, communication time information, and frequency data information at both ends of the communication.
[0016] Step 2: Use Calculate the point-to-point ionospheric distance between the sample data obtained in step 1, and the number is N; where, (x i ,y i ) is the longitude and latitude coordinates of receiving point A, (x j ,y j ) is the longitude and latitude coordinates of the receiving point B, SF is the scale factor, the value of the scale factor is selected according to the different latitude ranges of the reconstruction area, when the latitude is in the range of [...
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The invention relates to a spatial local estimation based maritime short-wave frequency data reconstruction method and belongs to the technical field of wireless communication frequency prediction. The spatial local estimation based maritime short-wave frequency data reconstruction method is characterized by comprising calculating average distances and experimental variation function values of point pairs in every separation distance through sample data collected through frequency spectrum management equipment; performing fitting on an index model variation function through experimental variation function point pair data to obtain theoretical index variation function parameters; reconstructing area sample points according to short-wave frequency data to solve spatial local estimation equations to obtain weight coefficients of every sample point for participating in data reconstruction; establishing a spatial local frequency value reconstruction formula of points to be reconstructed to solve short-wave communication frequency data of the points to be reconstructed. According to the spatial local estimation based maritime short-wave frequency data reconstruction method, the spatial correlation of the short-wave frequency data is fully considered, the frequency data reconstruction is performed according to data which are actually used by ships, and accordingly the data reconstruction accuracy is high, the frequency selective time for self-adapting to short-wave communication equipment can be effectively shortened, and the maritime short-wave intermediate and long-range communication effect is improved.
Description
technical field [0001] The invention belongs to the technical field of wireless communication frequency prediction, and relates to a method for reconstructing sea shortwave frequency data based on spatial local estimation. Background technique [0002] Short-wave communication is a communication method that mainly relies on ionospheric reflected sky waves to achieve long-distance communication, and is one of the important means for maritime ships to achieve medium and long-distance communication. The selection of frequency restricts the development of short-wave communication, and the optimization of short-wave communication frequency is the key to exert the performance of short-wave communication equipment and improve the effect of short-wave communication. [0003] At present, in the process of selecting short-wave communication frequencies for ships at sea, two methods and methods, medium and long-term prediction and real-time detection, are mainly used. The mid- and lon...
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IPC IPC(8): H04B17/00
Inventor 张海勇徐池韩东李梁任重李利
Owner PLA DALIAN NAVAL ACADEMY