Синхронное сложение сигналов антенного поля со сдвигом импульсов дискретизации при сопровождении космического аппарата по целеуказаниям с учетом инерции движения антенн

Abstract

The method of synchronous addition of signals of separate antennas was proposed previously for the aggregation of relatively small-scale aperture antennas into a single digital antenna array (digital antenna field) with a combined area for receiving telemetry signals from spacecraft when antennas are mutually spaced by a distance big enough for them not to shade one another. The method is based on the idea of compensating mutual delays between the antennas of the received signal by a corresponding shift of the sampling pulses of the signals of different antennas. The present paper demonstrates the efficacy of the method in the mode of spacecraft tracking by target designations in orbits of global navigation systems with allowance for the inertia of antenna motion. It is shown that in spacecraft tracking mode, which is close to the real one, this method gives a signal-to-noise ratio and bit-error probability closer to the theoretical limit than the values obtained for the idealized mode (analyzed earlier), which equates the angular coordinates and velocities of the antennas to the calculated angles and velocities of spacecraft in target designation nodes.