Method and measurement configuration for measuring the characteristics of radio channels
US6311043A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2000 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Jun 5, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0854
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The characteristics of radio channels are measured. The signals received by a plurality M.sub.c 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.sub.c 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.sub.F, which contains invariances that characterize the channel in the space/frequency domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.