Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1997-11-06
2000-02-01
Trost, William G.
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
455 63, 455 69, H04B 110, H04Q 720, H04Q 730
Patent
active
060213345
ABSTRACT:
According to this method for transmitting a digital signal by a base station equipped with a multi-element antenna to a mobile, in the presence of interference sources and background noise, at least one frequency transposition operator is calculated which approximately transforms one reception calibration table into one transmission or reception calibration table; statistical data are calculated on the basis of the signals received by the various elements, originating from the mobile and the interference sources; for this mobile, an optimum set of spatial weightings is calculated on the basis of the statistical data, the frequency transposition operator, and a criterion for reinforcing the useful signal and reducing the interference sources; the digital signal is weighted on the basis of the optimum set of weightings, then it is transmitted.
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Adaptive Transmitting Antenna Methods for Multipath Environments, Derek Gerlach and Arogyaswami Paulraj Globecom 1994, pp. 425-429.
French Search Report dated Jul. 18, 1997, French Appl No. FR 9613597 filed Nov. 7, 1996.
Aste Thierry
Fety Luc
Forster Philippe
Mayrargue Sylvie
France Telecom
Gantt Alan
Trost William G.
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