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Titlebook: Aspects of Signal Processing With Emphasis on Underwater Acoustics, Part 2; Proceedings of the N G. Tacconi Conference proceedings 1977 Spr

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期刊全称Aspects of Signal Processing With Emphasis on Underwater Acoustics, Part 2
期刊简称Proceedings of the N
影响因子2023G. Tacconi
视频video
学科分类Nato Science Series C:
图书封面Titlebook: Aspects of Signal Processing With Emphasis on Underwater Acoustics, Part 2; Proceedings of the N G. Tacconi Conference proceedings 1977 Spr
影响因子This paper describes the results of current research at DREA in which techniques of optimum array processing are being applied to active sonar. We are presenting these results at the Advanced Study Institute in order to illustrate some actual applications for such processing and to point out some of the practical considerations which arise in real systems. In particular, the paper concerns the problems which arise when the individual sensor elements have a complicated directivity pattern themselves. This is a common phenomenon in active systems where the receiving sensors are complex resonant structures and are housed in a dome or towed body presenting various baffling and diffraction effects. Most treatments of array processing consider ideal elements which have well behaved directivity properties and are transparent to the field. The results of this paper show that where these properties are not met, careful in situ array measurements are required, and even with such measurements practical array gains may not be as good as predictions based on ideal sensors.
Pindex Conference proceedings 1977
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https://doi.org/10.1007/b115533e proposed implementation separates out, in a natural manner, the three basic components of a linearly constrained adaptive beamformer: the conventional beamformer, the linear constraints, and the adaptive algorithm. This separation has significant advantages in practical implementations and suggests extensions to other beamformer structures.
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An Adaptive Beamformer which Implements Constraints Using an Auxiliary Array Preprocessore proposed implementation separates out, in a natural manner, the three basic components of a linearly constrained adaptive beamformer: the conventional beamformer, the linear constraints, and the adaptive algorithm. This separation has significant advantages in practical implementations and suggests extensions to other beamformer structures.
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Conference proceedings 1977eal elements which have well behaved directivity properties and are transparent to the field. The results of this paper show that where these properties are not met, careful in situ array measurements are required, and even with such measurements practical array gains may not be as good as predictions based on ideal sensors.
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Constrained systems: preliminaries an adaptive radio antenna which utilised digitally controlled analogue weights, and which for practical reasons, might be fairly coarsely quantised. In either case the effect of quantisation is to limit the degree of rejection of interference sources which can be achieved in the adaptive null-steering system.
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The Effects of Signal and Weight Coefficient Quantisation in Adaptive Array Processors an adaptive radio antenna which utilised digitally controlled analogue weights, and which for practical reasons, might be fairly coarsely quantised. In either case the effect of quantisation is to limit the degree of rejection of interference sources which can be achieved in the adaptive null-steering system.
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