公开(公告)号：US20240241250A1

公开(公告)日：2024-07-18

申请号：US18290300

申请日：2022-03-13

申请人： Christian-Albrechts-Universitaet zu Kiel

发明人： Gerhard Schmidt ,  Eckhard Quandt ,  Hanna Lewitz ,  Tim Owe Wisch ,  Bastian Kaulen ,  Alexej Namenas ,  Frederik Kuehne

IPC分类号： G01S15/00 ,  G01S7/536 ,  G01S15/52 ,  G01S15/58

CPC分类号： G01S15/003 ,  G01S7/536 ,  G01S15/523 ,  G01S15/586

摘要： A sonar method and assembly for detecting and/or determining the position and/or speed of objects underwater and/or on the water in a specified region. The orthogonality of Doppler-shifted transmission sequences is explored. First, a transmission sequence is generated, spread for some possible Doppler shifts and output via the transmission elements. If the transmission sequence is chosen carefully, the spread versions become orthogonal to each other and enable MIMO signal processing. If one of the assumed spreads matches the speed of the object, the spread is canceled out again to form the original transmission signal. This allows the binary detection of the presence of an object with the correlation of only one sequence and reduces the computing effort at the respective receivers enormously.