The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2006
Filed:
Aug. 13, 2001
Andrei Malkov, Salo, FI;
Heikki Berg, Tampere, FI;
Pekka Kaasila, Oulu, FI;
Kiran Kumar Kuchi, Irving, TX (US);
Jan C. Olivier, Highland Village, TX (US);
Andrei Malkov, Salo, FI;
Heikki Berg, Tampere, FI;
Pekka Kaasila, Oulu, FI;
Kiran Kumar Kuchi, Irving, TX (US);
Jan C. Olivier, Highland Village, TX (US);
Nokia Corporation, Espoo, FI;
Abstract
Method and apparatus for soft bit computation with a reduced state equalizer. The method assures that the number of states in the equalizer is reduced to obtain acceptable complexity, while also ensuring that soft bit computation is performed for substantially all bits. The method involves computing a first set of soft bits from bits transmitted in a received signal, using a reduced-state trellis with finite non-zero delay, calculating hard decisions in response to the received signal, and also ensuring that substantially all soft bits are computed by employing zero-delay soft decision-making or decision-feedback equalization to compute a second set of soft bits. Furthermore, the hard decisions are used to compute the second set.