公开(公告)号：US10004052B2

公开(公告)日：2018-06-19

申请号：US14980122

申请日：2015-12-28

Applicant: KOREA INSTITUTE OF OCEAN SCIENCE AND TECHNOLOGY

Inventor： Seung-Guen Kim ,  Yong-Kon Lim ,  Sea-Moon Kim ,  Jong-Won Park ,  Changho Yun

IPC: H04B1/709 ,  H04W56/00

CPC classification number: H04W56/004 ,  H04W56/0065

Abstract: 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 (T1o) at a point having maximum energy of the correlation, and detecting a multipath delay profile at the time (T1o); 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 (T2o) 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 (T1o) and the time (T2o) at points having respective maximum energy.