Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2006-02-03
2010-12-14
Afshar, Kamran (Department: 2617)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C375S260000, C375S267000, C375S299000, C375S340000, C375S347000, C455S273000, C370S335000, C370S340000, C370S208000, C370S350000, C370S491000
Reexamination Certificate
active
07852811
ABSTRACT:
In a collaborative, multiple input, multiple output wireless communication system, a transmitting device transmits a peak-limited pilot signal to a receiving device. The receiving device independently synthesizes the same pilot signal transmitted by the transmitting device. The synthesis process involves precoding the pilot signal and peak limiting the precoded pilot signal. The receiving device receives a signal r that represents the product of (i) a channel matrix H between the transmitting device and the receiving device and (ii) the peak-limited pilot signal yp(n)′ plus noise η, i.e. r=Hyp(n)′+η. The synthesized, peak-limited pilot signal can then be used by a channel estimator to determine an estimated channel matrix Ĥ. Thus, the estimated channel matrix Ĥ represents a closer estimate of the channel matrix H than conventional channel estimation processes and, thus, can provide better corresponding performance than conventional MIMO wireless communication systems.
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Afshar Kamran
Arevalo Joseph
Dillon & Yudell LLP
Freescale Semiconductor Inc.
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