发明名称 FREQUENCY DIVISION BEAMFORMING FOR SONAR ARRAYS
摘要 A sonar array for forming multiple transmit and/or receive acoustic beams by a frequency beamforming technique. In frequency division beamforming, beam steering direction is made a function of frequency by driving (receiving) each element of a uniformly spaced line array by a signal which leads or lags its nearest neighbor by a fixed phase shift, Deltaphi. This permits scanning a transmit and/or receive beam through a range of angles by changing its frequency. The same principle can be used to form multiple simultaneous transmit and/or receive beams. This is accomplished by transmitting a wide bandwidth signal and receiving the echoes through a spectrum analyzer. Each frequency bin of the spectrum analyzer then corresponds to a beam pointing in its own unique direction. Advantages of such a sonar system include improved cost, weight, and size versus performance for a variety of systems including ahead looking sonars and bottom mapping sonars.
申请公布号 US2003214880(A1) 申请公布日期 2003.11.20
申请号 US20020232812 申请日期 2002.08.28
申请人 ROWE FRANCIS D 发明人 ROWE FRANCIS D
分类号 G01S7/52;G01S7/521;G10K11/34;(IPC1-7):G01S15/00 主分类号 G01S7/52
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