Method and arrangement for automatic frequency correction

Details Method and arrangement for automatic frequency correction Method and arrangement for automatic frequency correction

2007-09-04

2007-09-04

Pham, Chi (Department: 2616)

Multiplex communications

Duplex

Communication over free space

C375S149000

Reexamination Certificate

active

10242481

ABSTRACT:
A method and arrangement for automatic frequency correction in UTRA TDD mode, having a first stage (500) for frequency lock in idle mode, and a second stage (600) for receiving a channel estimate from beacon function (mx1), receiving a channel estimate from at least one other physical channel (mx2), and receiving output from a primary synchronisation code correlator (mx0, pc1, pc2), and for producing therefrom signals (X,Y,N) for use in frequency correction. By utilising first and second partial correlation values (pc1, pc2) which are balanced, DC offset effects may be substantially removed. This provides the following advantage of significantly improving performance at low levels of SNR, and removal of DC offset effects provides immunity to DC offsets arising from imperfections in hardware.

REFERENCES:
patent: 4879728 (1989-11-01), Tarallo
patent: 5678215 (1997-10-01), Carsello
patent: 5751776 (1998-05-01), Shiino et al.
patent: 6278727 (2001-08-01), Yanagi
patent: 6320917 (2001-11-01), Stott et al.
patent: 6628926 (2003-09-01), van de Beek et al.
patent: 6801567 (2004-10-01), Schmidl et al.
patent: 19933266 (2000-11-01), None
patent: 10001854 (2001-08-01), None
patent: 2170978 (1986-08-01), None
patent: 2379840 (2003-03-01), None
patent: WO-98/34357 (1998-08-01), None
patent: WO-01/61880 (2001-08-01), None
patent: WO-03/024045 (2003-03-01), None
Rapporteur: Chapman, Thomas. “3GPP TS 25.221—Physical channels and mapping of transport channels onto physical channels (TDD),” located at <http://www.3gpp.org/ftp/Specs/html-info/25221.htm>. First available Feb. 4, 1999; 3 pgs.
Search Report dated Apr. 10, 2002, for United Kingdom Patent Application Serial No. GB 0122090.4 filed on Sep. 13, 2001, 1 pg.
International Search Report mailed on Apr. 12, 2002, for PCT Patent Application No. PCT/GB02/04193 filed on Sep. 13, 2002, 3 pgs.

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