Frequency offset correction for an ultrawideband...

Details Frequency offset correction for an ultrawideband... Frequency offset correction for an ultrawideband...

2011-03-29

2011-03-29

Burd, Kevin M (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

07916799

ABSTRACT:
A method and a receiver system for subcarrier-specific frequency offset correction including frequency offset estimation, updating and compensation. The method includes initial frequency offset estimation in time domain using packet preamble, frequency offset compensation during channel estimation symbols using the initial frequency offset estimate, and frequency offset update tracking during header and data part both being performed in the frequency domain. The initial frequency offset estimation includes using a sum over a number of time lagged autocorrelation results, corresponding to a number of the last consecutive symbols of the preamble part of the packet with the autocorrelations being the result of a sum over a window of cross-correlations between the incoming signal and the respective packet synchronization sequence. The receiver includes receiver blocks for initial frequency offset estimation, frequency offset compensation, frequency offset update tracking and obtaining a current frequency offset estimate.

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International Search Report for International Application No. PCT/US2007/008436, filed Apr. 3, 2007, International Search Report dated Jun. 23, 2008 and mailed Jul. 7, 2008 (2 pgs.).

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