Joint Reception Method and Monopulse Direction Detecting of Signals of Radio-Radiating Dynamic Objects
- PDF / 305,833 Bytes
- 4 Pages / 612 x 792 pts (letter) Page_size
- 35 Downloads / 193 Views
RY AND METHODS OF SIGNAL PROCESSING
Joint Reception Method and Monopulse Direction Detecting of Signals of Radio-Radiating Dynamic Objects N. Yu. Muzychenko* Rostov-on-Don Radio Research Institute, Rostov-on-Don, 344038 Russia *e-mail: [email protected] Received November 12, 2019; revised November 12, 2019; accepted February 18, 2020
Abstract—A method for joint reception and monopulse direction-finding of signals of radio-emitting dynamic objects based on equalization of the transmission coefficients in the direction-finding channels by noise dispersion is proposed. The mathematical apparatus used in seeking a solution was fuzzy set theory. The efficiency of the method is confirmed by the results of field tests. DOI: 10.1134/S1064226920080094
INTRODUCTION The problems of reception and direction-finding of signals from radio-emitting dynamic objects (DOs) are not new, and many developers of radio engineering systems have to deal with solving them. As elements that perform the functions of reception and spatial selection of the received signals, depending on the selected structure, separate or combined antenna systems (AS) are used. In the first case, a diagram-forming device (DFD) based on hybrid connections [1] or cross-switches [2] is used as the primary signal processing device; in the second case, a DFD is not required and mismatch signals are identified during secondary processing [3]. Compensation for off-boresight departure from the geometric axis of the AS in [1, 2] is done automatically, and in [3], by periodically equalizing the transmission coefficients in the direction-finding channels using a signal from the source of the control signal. This leads to the main disadvantage of a combined amplitude monopulse AS—dependence on the control antenna—and makes it important to study how to eliminate it. The procedure proposed in [4] for determining the central point of grouping of noise samples and noise dispersion opens up new possibilities for this. In this study, the authors attempt to develop a method for joint reception and monopulse directionfinding of signals of radio-emitting DOs, based on equalization of the transmission coefficients in the direction-finding channels using noise dispersion. 1. STATEMENT AND SOLUTION OF THE PROBLEM Let the AS of the equipment for radio monitoring of the DO be performed according to the scheme shown in Fig. 1.
The parameters of the elements of the scheme provide in-phase addition of signals received by radiating elements RE1–RE4 in the dynamic range of the received signals, which, when the condition for aiming the AS at the DO yields a solution to the signal reception problem. Let also, according to the results of radio emission reception from the direction to the controlled object, its recording, and processing in the parallel analysis band ΔF in each information channel IC1–IC4, the averaged periodograms are constructed corresponding to the directions shifted by the width of the radiation pattern with respect to the geometric axis in the vertical j = 1, j = 3 and h
Data Loading...
