Telecommunications – Transmitter – Plural modulation
Reexamination Certificate
2005-10-13
2010-11-02
Le, Lana N (Department: 2618)
Telecommunications
Transmitter
Plural modulation
C455S042000, C455S504000, C455S063400, C455S066100, C455S067110, C455S067130, C455S101000, C455S103000, C455S127200
Reexamination Certificate
active
07826807
ABSTRACT:
Base stations transmit strip signals using strip signal segments and self supporting modulation scheme techniques facilitating rapid channel estimate. A strip segment occupies one OFDM symbol time interval and uses a set of downlink tones; some, e.g., half, of the tones are left unused facilitating SIR measurement. The strip segments are advantageously timed to correspond to uplink access intervals in which connected wireless terminals do not typically transmit uplink signals. Connected wireless terminals including: multiple antennas used in combination, an antenna duplex module, single RF receiver chain and single RF transmitter chain, switch antenna coefficient combinations based on strip signal segment timing. The wireless terminal determines an independent downlink channel quality measurement, e.g., SNR and/or SIR for each strip signal segment and for on-going non-strip signaling. The wireless terminal compares channel quality measurements and selects an antenna coefficient combination to be used during non-strip signaling intervals obtaining very good antenna gain.
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Lane Frank A.
Laroia Rajiv
Li Junyi
Hsieh Ping Y
Jenckes Kenyon S.
Le Lana N
QUALCOMM Incorporated
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