A system and method for determining attitude using
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专利名称：A system and method for determining attitude using spatial shift key (SSK)
modulation signatures
发明人：DAVID SMALL
申请号：AU2004262052
申请日：20040803
公开号：AU2004262052A1
公开日：
20050210
专利内容由知识产权出版社提供
摘要：The present invention discloses a system and method for creating high resolution synthesized phase centre movement with minimal antenna elements. A plurality of antenna elements are, which are spatially distributed within a quarter wavelength of one another, are each connected to individual variable gain sections, such as radio frequency (RF) digital attenuators. A control means, such as a microprocessor, is configured to control the level of gain from each variable gain section, sto that the gain of each antenna element can be individually modified. Varying the gain distribution between antenna elements of an antenna array has the effect of shifting the phase centre of the array. Thus, as gain is redistributed between antenna elements the phase centre of the array is displaced and a synthesized Doppler is induced upon the signal. Phase center panning is reciprocal; that is, varying the gain distribution between antenna elements in a transmit array or in a receive array will induce the same synthesized Doppler effect upon the signal. By varying the gain distribution between antenna elements in a continuous predetermined manner a continuous predetermined phase center movement will be generated, which will be measured as a cyclic Doppler shift by
an observing carrier-phase user receiver.
申请人：LOCATA CORPORATION
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