Method and apparatus for Doppler frequency estimation

Details Method and apparatus for Doppler frequency estimation Method and apparatus for Doppler frequency estimation

2005-02-01

2005-02-01

Qureshi, Afsar M. (Department: 2667)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S252000, C370S342000, C370S465000, C375S148000, C375S267000, C455S103000

Reexamination Certificate

active

06850505

ABSTRACT:
A channel estimate generator generates a plurality of channel estimates and a Doppler frequency estimator uses two or more channel estimates to generate a Doppler frequency estimate. The Doppler frequency estimator generates the Doppler frequency estimate by calculating the normalized distance between two consecutive channel estimates. A receiver uses the Doppler frequency estimate to either (1) adjust the receiver, (2) estimate the velocity of the receiver, (3) determine whether it is necessary to search for new paths, or (4) predict or track new paths. The receiver can use a moving average of Doppler frequency estimates or a weighted combination of Doppler frequency estimates from different paths of a received signal to calculate the Doppler frequency estimate.

REFERENCES:
patent: 4914699 (1990-04-01), Dunn et al.
patent: 5577068 (1996-11-01), Bottomley et al.
patent: 5615409 (1997-03-01), Forssen et al.
patent: 5818876 (1998-10-01), Love
patent: 5995572 (1999-11-01), Dettmar
patent: 6067315 (2000-05-01), Sandin
patent: 6249682 (2001-06-01), Kubo et al.
patent: 6377813 (2002-04-01), Kansakoski et al.
patent: 6424642 (2002-07-01), Schmidl et al.
patent: 6470000 (2002-10-01), Burns et al.
patent: 6542562 (2003-04-01), Ostberg et al.
patent: 0 790 727 (1997-08-01), None
patent: WO199300777 (1993-01-01), None
patent: 9418752 (1994-08-01), None
patent: WO 9418752 (1994-08-01), None
patent: WO 9524086 (1995-09-01), None
patent: 9929046 (1999-06-01), None
patent: WO 9929046 (1999-06-01), None

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