RESEARCH OF WIDTH OF WORKING SECTOR OF DIRECT DIGITAL CORRELATIVE-INTERFEROMETRIC DIRECTION FINDER WITH RECONSTRUCTION OF SPATIAL ANALYTICAL SIGNAL
Journal Title: Вісник Національного університету "Львівська політехніка", серія "Радіоелектроніка та телекомунікації" - Year 2016, Vol 849, Issue 2016
Abstract
It was conducted the research of the width of the working sector and the exactness of direct digital correlative-interferometric direction finder that uses reconstruction of spatial analytical signal. It is shown that the main operation that has a basic effect on the width of the working sector of the direction finder is the parallel two-dimensional filtration of the radiation with using of algorithm of fast Fourier transform (FFT). Two-dimensional filtration of the radiation should be carried out in frequency-spatial field of determination with using of two-step fast reconstruction of harmonic components of radio emission. At first stage the parallel frequency filtration of the radiation is implemented in direction finding channels on an intermediate frequency using fast Fourier transform algorithm, followed by rapid reconstruction of selected radiation in the time domain. At second stage the parallel spatial filtration is implemented using a digital synthesis of the multidirected directional pattern, which blocks the working sector of direction finding. It was determined that the width of working sector of direction finding is limited by parasitic distortions in the synthesis of the multidirected directional pattern and depends on the type of weight function of digital pattern formation ("window"), aperture size and number of elements of linear antenna lattice. It was conducted the research of the methods of rapid reconstruction of radio emission in their frequency filtration using real and complex forms of signal representation and its impact on the width of the working sector of direction finding. It was shown the expediency of using of complex reconstructed radiation implementations. The proposed method of expansion of the working sector of direction finding that uses reconstruction of spatial complex analytical signal provides the wider [15–165] degrees sector of direction finding and significantly simplifies direction finding algorithm.
Authors and Affiliations
V. Tsyporenko
Keywords
Related Articles
- EP ID EP457180
- DOI -
- Views 137
- Downloads 0
INVESTIGATION OF THE FREQUENCY RESPONSE CHARACTERISTIC OF THE SOFTWARE PHASE-LOCKED LOOP
The goal of this paper is an experimental measurement of the frequency response of the software phase-locked loop (PLL) transfer function using frequency modulated signals. The article describes the block diagram of the...
RESEARCH OF THE FREQUENCY PLANNING METHODS FOR CELL NETWORKS BASED ON LTE AND GSM TECHNOLOGIES
Modern researches in field of mobile network depend on network infrastructure in a specific region. Nowadays, the actual issue is reforming of the existing frequency range for LTE deployment. The most common band is 900/...
Optimization the afc of sound reproduction device under the influence of acoustic noise
The state standard for audio frequency amplifiers (LFA) requires the uniform amplitude-frequency characteristic (AFC) in the frequency range from 40 Hz to 18 kHz. But the test of high quality amplifiers on motor vehicles...
MODEL OF DOWNLINK PREVENTIVE TRANSFER RESTRICTIONS FOR WIMAX TECHNOLOGY IN THE OVERLOAD STATE
Paper depicts that one of the main challenges in wireless networks WiMAX is the task of ensuring the required service quality, which involves the separation of user stations network of guaranteed rate in the downlink. Pr...
ANALYSIS OF RAIL DEFECTS SIGNALS BY THE MATLAB WAVELET TOOLBOX PROGRAMME
Rail networks across the world are getting busier with trains travelling at higher speeds and carrying more passengers and heavier axle loads than ever before. The combination of these factors has put considerable pressu...