Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Reexamination Certificate
2007-11-30
2011-11-22
Aminzay, Shaima Q (Department: 2618)
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
C455S101000, C455S013100, C455S013400, C370S433000, C370S274000, C375S148000, C375S299000
Reexamination Certificate
active
08064823
ABSTRACT:
Apparatus, methods and computer program products implement a channel-aware approach for controlling a relay network operative in a wireless communications system wherein weighting matrices are used at a MIMO-capable source electronic device and at the relays where at least one of the weighting matrices is selected or derived using knowledge of channel components of at least one channel link, where the channel link may be from the relays to the destination antennas of the destination device; or from source antennas of the MIMO-capable source device to the relays, or from the source antennas of the MIMO-capable source device to the destination antennas of the destination device. In one approach weighting matrices applied at the source and relay nodes are selected from a predetermined codebook of weighting matrices in dependence on monitored channel conditions. Alternatively, the weighting matrices may be determined using an eigenvalue decomposition and power allocation (e.g., water-filling) approach by using the effective channel correlation matrix possibly combined with the use of the noise correlation matrix.
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Fertl Peter
Hottinen Ari
Aminzay Shaima Q
Harrington & Smith
Nokia Corporation
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