I.A. Salnyy1

1 JSC "Taganrog Scientific Research Institute of Communications" (Taganrog, Russia)

One of the tasks solved by promising systems of radio monitoring and identification of radio emission sources is the receiving and processing of short pulses with a duration of tи ≤ 0,1 μs. Currently existing receivers do not provide high accuracy in measuring the carrier frequency of microwave signals modulated by short pulses. Therefore, increasing the accuracy of measuring the frequency of input microwave signals modulated by short pulses is of great importance for both existing and future systems of radio monitoring and identification of radio emissions. Purpose of article – suggest a way to improve the frequency measurement accuracy and a block diagram of a hybrid receiver for measuring the carrier frequency of a microwave signal modulated by short pulses, based on a combination of a digital receiver and a receiver with a frequency discriminator.

The method and diagram of a hybrid receiver for measuring the carrier frequency with increased accuracy for measuring the carrier frequency of short pulses based on a combination of a digital receiver and an instantaneous frequency measurement receiver (IFM)  using a frequency discriminator and a delay line are proposed. The block diagram of a universal broadband hybrid receiver for instantaneous measurement of the carrier frequency of a signal is proposed. This receiver uses a frequency divider with an adjustable dividing coefficient, the output of which is connected: to a receiver with digital signal processing (to determine the reports of «rough» signal frequency); to a frequency refinement receiver with a frequency discriminator.

Salnyy I.A. Hybrid receiver for determining the carrier frequency of microwave signal based on combination of DSP module and receiver with frequency discriminator. Information-measuring and Control Systems. 2023. V. 21. № 1. P. 19−27. DOI: https://doi.org/10.18127/j20700814-202301-03 (in Russian)

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