US 7,526,021 B2
	Telecommunications transmission systems
Magnus Johansson, Luleå (Sweden); Lennart Olsson, Luleå (Sweden); Gunnar Bahlenberg, Luleå (Sweden); Daniel Bengtsson, Luleå (Sweden); Mikael R. Isakssaon, Luleå (Sweden); Sven-Rune Olofsson, Luleå (Sweden); and Sven Göeran Öekvist, Luleå (Sweden)
Assigned to STMicroelectronics S.A., Montrouge (France)
Filed on May 17, 2006, as Appl. No. 11/436,014.
Application 11/436014 is a continuation of application No. 09/700617, granted, now 7,079,610, previously published as PCT/SE99/00790, filed on May 11, 1999.
Claims priority of application No. 9801748 (SE), filed on May 18, 1998.
Prior Publication US 2006/0209976 A1, Sep. 21, 2006
This patent is subject to a terminal disclaimer.
Int. Cl. H03H 7/30 (2006.01); H03H 7/40 (2006.01)

U.S. Cl. 375—229  [375/230; 375/231; 375/232; 375/233; 375/234; 375/235; 375/236]

36 Claims

1. A receiver, for use in an Orthogonal Frequency Division Multiplexing (OFDM) transmission system, comprising an adaptive channel equalizer means, detector means, equalization parameter updating means, a sampling clock and a sampling clock control means, the equalization parameter updating means responding to outputs of the detector means and the adaptive channel equalizer means to provide an equalizer parameter (EQ) to the adaptive channel equalizer means, the equalization parameter updating means including an ambiguity prevention mechanism to prevent said adaptive channel equalizer means from operating on time differences between the receiver and a transmitter which should be corrected by operation of said sampling clock control means, the equalizer parameter having an equalizer parameter argument function, wherein said equalizer parameter argument function is rotated in small steps until a slope of a linear part of the equalizer parameter argument function is zero.