FIELD: wireless communications.
SUBSTANCE: invention relates to radio communication. Said technical result is achieved by receiving an acoustic signal by a microphone in one of said mobile device and base unit; determining a correlation of a second signal with received acoustic signal; and determining acoustic quality and/or distance between mobile device and base unit based on one or more peaks in result of step of determining correlation.
EFFECT: technical result is determination of proximity of a mobile device to a base unit by estimating distance and/or quality of acoustics between mobile device and base unit.
16 cl, 10 dwg
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