Method for synchronization of a CDMA-signal

Multiplex communications – Communication over free space – Combining or distributing information via code word channels...

Reexamination Certificate

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C370S350000

Reexamination Certificate

active

07035244

ABSTRACT:
A method for synchronization of an input-chip-sequence (x(ν)) of a CDMA-signal with a Pilot-Chip-Sequence (pn(ν)) having the method steps of: dividing the Pilot-Chip-Sequence (pn(ν)) into subintervals (1, 2, 3 . . . 8); assembling a particular number (2·AnzSub) of the subintervals (1, 2, 3 . . . 8) into subinterval groups; forming at least one summed subinterval group(s) (pnΣ1(ν), . . . ) by linewise, pairwise arranging respective one-following-the-other subintervals (1,2; 2,3; 3,4; . . . 8,1), with the first subinterval of a particular line being respectively the second subinterval of the previous line, and column-wise adding the chips of all the line-wise, pair-wise arranged subintervals (1,2; 2,3; 3,4; . . . 8,1); and correlating the input-chip sequence with each summed subinterval group (pnΣ1(ν), . . . ) in a first correlation (5; 5a; 5b) for determining a displacement (Ôffset) between the input-chip-sequence and that of the summed subinterval group(s) (pnΣ1(ν), . . . ).

REFERENCES:
patent: 6373881 (2002-04-01), Mizuguchi et al.
patent: 6748006 (2004-06-01), McDonough et al.
patent: 6766337 (2004-07-01), Bae et al.
patent: 6801569 (2004-10-01), Yang
patent: 6895421 (2005-05-01), Dor et al.
patent: 199 19 545 (2000-11-01), None
patent: 199 53 349 (2001-06-01), None
patent: 09018458 (1997-01-01), None

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