Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2008-04-29
2008-04-29
Payne, David C. (Department: 2611)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S001000, C375S347000
Reexamination Certificate
active
07366520
ABSTRACT:
The invention relates to a signal processing method which optimizes the bit error rate under pragmatic conditions. The signalling method is optimally matched to the radio channel, variable with time, in rapid sequence by means of linear operations. Uplink and downlink transmission sides are determined by an excess of antennae on the downlink transmission side. The estimations of the channel matrix in the one transmission direction, necessary for the matching of the transmitter, can, in the absence of common-channel distortions with the condition of channel reciprocity, be directly obtained from the estimations for the other transmission direction. By a suitable linear combination of the transmission signals and, optionally, also the received signals, an error-free bi-directional transmission of data streams can be achieved in Rayleigh and Rice channels with significantly lower transmission powers than in purely receiver-side linear signal processing.
REFERENCES:
patent: 6771706 (2004-08-01), Ling et al.
patent: 7062294 (2006-06-01), Rogard et al.
patent: 2003/0031264 (2003-02-01), Barry et al.
patent: 2006/0146725 (2006-07-01), Li et al.
V.Jungnickel et al., “A Radio System With Multi-Element Antennas”, Proceedings 53rd IEEE Vehicular Technology Conference VTC(Spring), May 6-9, 2001, Rhodos, Greece. (please pp. 167-170).
John R. Barry, Joon Hyun Sung, “Space-Time Processing with Channel Knowledge in Array-to-Array Communications”, School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia, Jun. 9, 2000, Appendix C.
John R. Barry et al., “A Simple and Adaptive Channel Diagonalizer for Optimal Space-Time Processing”, School of ECE, Georgia Institute of Technology, May 1, 2000.
Haustein Thomas
Helmolt Clemens v.
Jorswieck Eduard
Jungnickel Volker
Krueger Udo
Flores Leon
Payne David C.
Siemens Aktiengesellschaft
Staas & Halsey , LLP
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