350 rub
Journal Achievements of Modern Radioelectronics №7 for 2016 г.
Article in number:
Choice of diagonal loading value in adaptive space processing problem
Keywords:
adaptive space processing
diagonal loading value
diagonal loading factor
interference to noise ratio
signal to interference plus noise ratio
Authors:
M.V. Ratynsky - Dr.Sc. (Eng.), Head of Sector, JSC « All-Russian Scientific Research Institute of Radiotechnics». E-mail: m3v5r7@inbox.ru
Abstract:
Antenna array directivity loss being not more than several tenth of dB under optimal solution of adaptive space processing problem, increases under quasioptimal solution (under finite number of training samples) because of the spread of noise eigenvalues of sample covariance matrix of antenna array input signals. Diagonal loading of sample covariance matrix that makes noise eigenvalues more even (and simultaneously increases their values) decreases the array directivity loss, but decreases the suppression of interferers too when diagonal loading value is sufficiently high. Optimum diagonal loading value is determined by the minimum of the sum loss caused by the array directivity loss and by the limited interference suppression. Analytical expressions for adaptive space processing system performance indicators are obtained that make possible estimating the parameters needed for optimum diagonal loading value choice.
Pages: 53-63
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