Multiplex communications – Diagnostic testing – Determination of communication parameters
Patent
1997-05-01
1999-11-23
Jung, Min
Multiplex communications
Diagnostic testing
Determination of communication parameters
375347, H04L 102
Patent
active
059912731
ABSTRACT:
Diversity path signals, each comprising time division multiplexed symbols in a time slot including known symbols constituting a reference signal, are combined with respective weights to reduce co-channel interference. The weights are determined, from a correlation matrix and a reference signal correlation vector, using a sliding window starting with synchronization symbols and/or CDVCC (coded digital verification color code) symbols as the known symbols. SINR (signal to interference plus noise ratio) is determined for each window position from elements of the correlation matrix and the reference signal correlation vector. The determined SINRs are averaged through the time slot, over a plurality of time slots, and for the diversity paths to provide an accurate determination of SINR within a short period. The SINR provides a reliable signal quality parameter that is useful in a cellular communications system for procedures such as hand-off, adaptive channel allocation, dynamic power control, and cell tiering.
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Haley R. John
Jung Min
Nortel Networks Corporation
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