Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2007-04-24
2010-11-09
Corrielus, Jean B (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S285000
Reexamination Certificate
active
07830994
ABSTRACT:
Channel estimation for high mobility OFDM channels is achieved by identifying a set of channel path delays from an OFDM symbol stream including carrier data, inter-channel interference noise and channel noise; determining the average channel impulse response for the identified set of channel path delays in each symbol; storing the average channel impulse responses for the identified channel path delays; generating a path delay curvature for each channel path delay in each symbol based on stored average channel impulse responses for the identified channel path delays; estimating the carrier data in the symbols in the OFDM symbol stream in the presence of inter-channel interference noise and channel noise from the OFDM symbol stream and the average impulse responses for the identified channel path delays; reconstructing the inter-channel interference noise in response to the path delay curvature, the identified set of channel path delays and estimated carrier data; and subtracting the reconstructed inter-channel interference noise from the OFDM symbol stream to produce a symbol stream of carrier data and channel noise with suppressed inter-channel interference noise.
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An Wei
Primo Haim
Stein Yosef
Analog Devices Inc.
Corrielus Jean B
Goodwin & Procter LLP
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