ELECTRONICS, ELECTRONIC COMMUNICATIONS, INSTRUMENTATION AND RADIO ENGINEERING

Multichannel Analog-to-Digital Path of Software-Controlled Radio Receivers with Correction of Unequal Time Shifts of Channel Signals

Authors

G. G. Bortnyk ORCID 0000-0001-7083-2775
Vinnytsia National Technical University ROR
O. G. Bortnyk ORCID 0009-0007-2315-0043
Vinnytsia National Technical University ROR
V. M. Kychak ORCID 0000-0002-1991-9012
Vinnytsia National Technical University ROR
S. V. Chubatiuk ORCID 0009-0008-4071-3247
Vinnytsia National Technical University ROR
DOI https://doi.org/10.31649/1997-9266-2026-187-4-171-177

Keywords

multichannel analog-to-digital path analog-to-digital converter multiplexer non-identity of time delays channel signals dynamic range

Abstract

The paper presents the method for expanding the dynamic range of multi-channel analog-digital paths (ADР) of software-controlled radio receivers. It is established that the dynamic range of a multi-channel ADР depends on the identity of the time parameters of the sample-and-store circuits (SSC) and analog-to-digital converters (ADC) in each channel and the relative spread of these parameters. The presence of aperture uncertainty in the i-th channel of the ADC leads to a time shift of the sampling points between the real edges of the clock pulses and the ideal edges of the pulses. Any non-identity between the aperture delays in the channels causes the appearance of the additional frequency components in the ADР output signal, which leads to a deterioration in the dynamic range of the ADР. It is proved that compensation of time non-identity can be carried out by adjusting the transmission characteristics of the ADР channels. That is, it is proposed to perform identification of time non-identity in the digital part of the ADР channel, and to compensate for this non-identity by controlling the transfer characteristic on the analog part of the ADР channel. Compensation of time non-identity of the channel is carried out by controlling the transfer characteristic of the corresponding ADР channel by switching the resistance in the signal sampling circuit of the SSC.

Structural diagram of a multi-channel ADР with correction of non-identity of time delays of channel signals has been developed. The ADР operates in two modes: identification and in the operating mode with correction of time delays of channel signals.

To study the efficiency of the method for correcting non-identity of time delays of the ADP channel signals, a simulation model of a multi-channel ADР has been developed. The developed model of a multi-channel ADР contains 8 channels of 16-bit ADC connected in parallel with sample-and-hold circuits, a multiplexer, a buffer register, a channel signal time delay correction unit and 8 digital-to-analog converters that control the transmission coefficients of the SSC in each ADР channel. Analysis of the efficiency of the developed method confirmed that the proposed method allows to expand the dynamic range of a 16-bit ADР by 37 dB.

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How to Cite

[1]
“Multichannel Analog-to-Digital Path of Software-Controlled Radio Receivers with Correction of Unequal Time Shifts of Channel Signals”, Вісник ВПІ, no. 4, pp. 171–177, Oct. 2026, doi: 10.31649/1997-9266-2026-187-4-171-177.

Author Biographies

G. G. Bortnyk, Vinnytsia National Technical University

Cand. Sc. (Eng.), Professor, Professor of the Chair of Infocommunication Systems and Technologies

O. G. Bortnyk, Vinnytsia National Technical University

Post-Graduate Student the Chair of Infocommunication Systems and Technologies

V. M. Kychak, Vinnytsia National Technical University

Dr. Sc. (Eng.), Professor, Head of the Chair of Infocommunication Systems and Technologies

S. V. Chubatiuk, Vinnytsia National Technical University

Post-Graduate Student the Chair of Infocommunication Systems and Technologies

References

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