Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1998-04-02
2000-03-21
Chin, Wellington
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455 63, 455509, 455 671, 370329, H04B 7212, H04Q 720
Patent
active
060412372
ABSTRACT:
A method of channel allocation for a communication connection to a radio interface in a mobile communication system with spatial subscriber separation. The method includes comparing the disclosed allocation method is to compare the theoretical minimum P.sup.(l) (given optimum spatial separability) to the anticipated downlink transmission power P.sup.(I) for each channel in the selection of a channel. In order to speed up the calculation, the factors allocated to the K communication connections are selected proportional to the dominant eigenvectors u.sub.k (C.sub.k). A low value for the quotient in channel l allows one to conclude that the eigenvector u.sub.k for all K communication connections respectively fits well to the covariance matrices C.sub.k of the other K-1 communication connections and, thus, a good spatial separability is established.
REFERENCES:
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patent: 5839074 (1998-11-01), Plehn
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patent: 5857143 (1999-01-01), Kataoka
patent: 5930716 (1999-07-01), Sonetaka
PIMRC 1996, "A Real Time Downlink Channel Allocation Scheme For An SDMA Mobile Radio System," Farsakh et al. Taipeh, Taiwan.
IEEE 1995, "Near-Far Effects in Adaptive SDMA Systems," Michael Tangemann, pp. 1293-1297. Toronto, Canada.
Chin Wellington
Nguyen Simon
Siemens Aktinegesellschaft
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