Abstract:

The results of the author's last work in the field of space-time signal processing (STSP) were presented at the 132nd Meeting of the Acoustical Society of America [I. I. Gorban, ``Space-time signal processing algorithms for moving antennae,'' J. Acoust. Soc. Am. 100, 2638(A) (1996)]. It touched the two problems of STSP in complicated dynamic conditions, where there was antenna motion with variable velocity and angle rotations, and modifying of the form of the antenna. The first problem is STSP optimization in conjunction with the complicated antenna motion, the noises, and the medium together. The second is the problem of super-multichannel STSP with low calculating efforts. New approaches were proposed for solving these problems. It was found that complicated antenna motion, often regarded as a destabilizing factor, may play a greatly positive role for increasing space-time selectivity and noise immunity of the systems. Rather than struggle with this destabilized factor it was proposed that one should use it. Ways to essentially reduce calculations for complicated STSP in dynamic conditions were also found. At the 133rd Meeting, the new results of the research developing the proposed approaches, for towed arrays in particular, will be presented.