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:
Feb. 11, 2003
Filed:
May. 15, 1998
Jan Mårtensson, Bromma, SE;
Johan Backman, Stockholm, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
The present invention relates generally to the detection of bits which are protected by repetition, and which, along with their repetitions, have associated soft values available which give a measurement of the reliability of their received values. In particular, the present invention may be used in speech encoding in the GSM mobile communications system, and more particularly to the detection of those class 2 bits called pulse bits which are not protected with channel coding. In enhanced full rate (EFS) transmission in GSM there are 4 bits called pulse bits. These pulse bits are duplicated twice, giving three bits for each original bit, for a total of twelve pulse bits. These bits have associated soft values, a probability measure of their reliability, that are produced by the equalizer. These associated soft values are then used in the present invention to improve detection of these pulse bits over the state of the art which detects the pulses bits only using a majority decision among the 3 bits generated, without using their associated soft values.