Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2011-06-28
2011-06-28
Payne, David (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S150000, C375S343000, C342S099000, C342S357270, C342S357380, C342S419000, C708S813000, C708S823000, C708S824000
Reexamination Certificate
active
07970081
ABSTRACT:
A wireless communication device uses a time-invariant delay-Doppler channel response estimate for received signal demodulation. The device provides coherent signal demodulation by accounting for frequency and time selectivity in a land-based mobile communication environment, which arise mainly because of delay and Doppler shifts, respectively. In one embodiment, the wireless communication device includes a channel estimator that estimates channel response in a wireless communication network by estimating a delay-Doppler response of a wireless communication channel to obtain a delay-Doppler channel response estimate and converting the delay-Doppler channel response estimate to a time-varying channel response estimate, e.g., a time-varying frequency or impulse response. The delay-Doppler response may be estimated in a continuous or discrete domain. In one embodiment, the channel estimator includes a delay-Doppler correlator that measures the delay-Doppler response by observing a response of a wireless communication channel to a pilot signal and converting the observed response to a delay-Doppler domain.
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Guey Jiann-Ching
Hafeez Abdulrauf
Hul Dennis
Coats & Bennett P.L.L.C.
Guarino Rahel
Payne David
Telefonaktiebolaget LM Ericsson (publ)
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