DocumentCode :
2006939
Title :
Multibeam imaging using spatially variant insonification
Author :
Jaffe, Jules S.
Author_Institution :
Scripps Inst. of Oceanogr., La Jolla, CA, USA
fYear :
1989
fDate :
6-8 Sep 1989
Firstpage :
211
Abstract :
Summary form only given, as follows. The design, fabrication, and preliminary results from a sonar system that projects different orthogonal waveforms in different directions are considered. It is demonstrated that this design criterion is identical to that encountered in multiaccess, spread-spectrum communication systems. The time-bandwidth properties of the system therefore limit the simultaneous requirement of decorrelatable beams and good range resolution. As a specific implementation of the technique a frequency-hopping code is presented. The performance of this code is examined, and it is demonstrated that this code is nearly optimal with respect to the above criterion. Design techniques for frequency-hop codes are presented for both coherent and incoherent processing algorithms. The spatial part of the problem is also addressed. Various configurations of transducers that specifically exploit the properties of spatially variant insonification are considered. The principles of multibeam sonar imaging systems using variant insonification are illustrated by constructing several examples of active sonar systems whose performance is superior to that of traditional designs
Keywords :
acoustic imaging; acoustic transducers; codes; frequency agility; picture processing; sonar; spread spectrum communication; coherent processing algorithms; design; frequency-hopping code; incoherent processing algorithms; multibeam sonar imaging systems; range resolution; spatially variant insonification; spread-spectrum communication systems; time-bandwidth properties; transducers; Algorithm design and analysis; Autocorrelation; Decorrelation; Fabrication; Frequency division multiaccess; Signal resolution; Sonar; Spread spectrum communication; Transducers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Multidimensional Signal Processing Workshop, 1989., Sixth
Conference_Location :
Pacific Grove, CA
Type :
conf
DOI :
10.1109/MDSP.1989.97126
Filename :
97126
Link To Document :
بازگشت