The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2001
Filed:
Jun. 05, 2000
Martin Haardt, München, DE;
Christopher Brunner, München, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
The characteristics of radio channels are measured. The signals received by a plurality M,of receiving sensors of a two-dimensional antenna array are composed of wave elements of a transmission signal with regard to the azimuth and the elevation of a different two-dimensional incidence direction and different delay. The transmission signal contains a preselected test sequence, and the incidence angle as well as the delay of the dominant wave fronts are estimated simultaneously taking account of the chip signal form of the test sequence. The signals of each antenna sensor are demodulated, and sampling is then carried out with M,samples per chip in the test sequence. The resultant samples are transformed to the frequency domain by discrete Fourier transformation, and the resultant values are corrected taking account of the spectrum of the chip signal form, wherein the line vectors formed from the values obtained for each sensor can be combined to form a data matrix X,, which contains invariances that characterize the channel in the space/frequency domain.