Platform noise mitigation

Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train

Reexamination Certificate

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Details

C375S262000

Reexamination Certificate

active

08085859

ABSTRACT:
In one embodiment of the invention, a Fourier transform unit converts unsynchronized data received through multiple antennas to a frequency domain. Also, a spectrum estimation unit determines a power spectrum for the unsynchronized data. A notch filter removes data within a frequency band from additional unsynchronized data based on the power spectrum. A synchronization unit synchronizes the notch filtered data and a noise estimation unit determines a noise covariance matrix between the synchronized data received from multiple antennas. In addition, an equalization unit performs channel equalization on the synchronized data based on the noise covariance matrix.

REFERENCES:
patent: 7230911 (2007-06-01), Jacobsen
patent: 7251282 (2007-07-01), Maltsev et al.
patent: 2002/0097813 (2002-07-01), Vaidyanathan
patent: 2004/0219885 (2004-11-01), Sugar et al.
patent: 2005/0213692 (2005-09-01), Zhidkov
patent: 2006/0222092 (2006-10-01), Guo et al.
patent: 2006/0222096 (2006-10-01), Guo et al.
patent: 2006/0290434 (2006-12-01), Bettner et al.
patent: 2007/0058693 (2007-03-01), Aytur et al.
U.S. Appl. No. 11/476,365, filed Jun. 27, 2006, entitled “Mitigation of Interference From Periodic Noise,” by Yongfang Guo, et al.

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