Multiplex communications – Generalized orthogonal or special mathematical techniques
Patent
1995-05-16
1997-05-20
Safourek, Benedict V.
Multiplex communications
Generalized orthogonal or special mathematical techniques
370330, 370319, 455 132, 455 25, 342373, H04J 316, H01Q 322
Patent
active
056318987
ABSTRACT:
A radio communication system and method employs matrix processing of received and transmitted signals to minimize co-channel interference. In one embodiment, the system and method transmits signals to a plurality of remote units by: i) correlating a signal received from a new remote unit during random access transmission with a plurality of individual antenna beam element signals to determine a new column of coefficients for a receive matrix; ii) determining a new inverse C-matrix for receiving traffic from the new remote unit based on an old inverse C-matrix and the new column; iii) transforming the new column to a new transmit C-matrix row by scaling relative coefficient phase angles using a ratio of up- to down-link frequencies; iv) determining a new transmit inverse C-matrix based on an old transmit inverse C-matrix and the new transmit C-matrix row; and v) transmitting signals to the remote units using the new transmit inverse C-matrix.
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Ericsson Inc.
Ngo Ricky
Safourek Benedict V.
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