Effectiveness evaluation results of multiple-beam self-focusing adaptive antenna arrays of radio-electronic systems
Antennas, SHF-devices and technologies
Аuthors*, **, ***
Radio-technical and information systems of aerospace defense, 89, bld.1, Zinaidy Konopljannikovoj str., Tver, 170041, Russia
The goal of the paper consist in Effectiveness evaluation results of multiple-beam self-focusing adaptive antenna arrays of radio-electronic systems.
The paper considers information radio-electronic system searching for radiation sources in conditions of complex signal-jamming environment, characterized by a priori uncertainty relative to their number and spatial position. The radiation sources’ signals feature overlapped energy spectra. The search is performed by the adaptaion results of the multiple-beam self-focusing adaptive antenna arrays as a part of antenna block of information radio-electronic system. The adaptation result represents separate estimations of the radiation sources signals’ amplitude-phase distribution at the aperture of the radio-electronic system antenna block. It allows form separate spatial channels for receiving the signals from radiation sources according to maximum criterion of signal/interference + noise ratio. The signal detection is based on Neyman-Pearson criterion by sampling results analysis, formed at the output of each spatial receiving channel. Estimation errors occurrence of vector of parameters of the multiple-beam self-focusing adaptive antenna arrays results in signal/interference + noise ratio decrease in spatial receiving channels, and, as a consequence, to efficiency reduction of radio-electronic systems by criterion of “correct detection probability”. Evaluation of the total error’s fluctuation value of the vector of parameters of the multiple-beam self-focusing adaptive antenna arrays was executed using a well-known estimation technique, as well as according to the simulation results of the considered adaptation algorithms. The obtained results revealed the parameter, mainly affecting the fluctuation value in evaluations of amplitude-phase distribution formed according to the results of the multiple-beam self-focusing adaptive antenna arrays adaptation. This parameter is angular misregistration of the radiation sources between each other. At keeping herewith the equality of the radiation sources’ angular positions the fluctuation error value would be affected by their number and bandwidth value of the self-adjustment closed loop of the multiple-beam self-focusing adaptive antenna arrays.
Keywords:multiple-beam self-focusing adaptive antenna array, signal detection, mutual interference
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