APPARATUS AND METHOD FOR ESTIMATING DOPPLER SHIFT IN UNDERWATER COMMUNICATION

摘要

Disclosed is an apparatus and method for estimating a Doppler shift for underwater communication. The apparatus includes: a multipath delay profile determiner for detecting a correlation of a known signal 1 and a received packet signal and time (T10) at a point having maximum energy of the correlation, and detecting a multipath delay profile at the time (T10); a correlation calculator for calculating a correlation between a correlation of a known signal 2 and the received packet signal, and the multipath delay profile; a maximum value detector for detecting time (T20) at a point having maximum energy of the correlation calculated by the correlation calculator; and a Doppler shift estimator for determining a Doppler shift using a difference between the time (T10) and the time (T20) at points having respective maximum energy.

主权项

1. An apparatus for estimating a Doppler shift for underwater communication, the apparatus comprising:
a multipath delay profile determiner for detecting a correlation between a known signal 1 and a received packet signal, time (T10) at a point having maximum energy of the correlation, and a multipath delay profile at the time (T10); a correlation calculator for calculating a correlation between the multipath delay profile and a correlation between a known signal 2 and the received packet signal; a maximum value detector for detecting time (T20) at a point having maximum energy of the correlation calculated by the correlation calculator; and a Doppler shift estimator for determining a Doppler shift using a difference between the time (T10) and the time (T20) at points having respective maximum energy.