Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2005-09-09
2011-10-04
Ha, Dac (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S260000, C375S261000
Reexamination Certificate
active
08031792
ABSTRACT:
A trellis processing technique for estimating a transmitted signal from a received signal acquired through a channel achieves a reduced computational structure when implementing a DDFSE-like branch metrics calculation by pre-storing computed values, which can be re-used. The technique involves storing differences between a received symbol and different products, each of which is a product of a channel coefficient corresponding to a least time delay and a different possible transmitted symbol. A summation of products is calculated, each product being a product of a possible transmitted signal symbol and a channel coefficient other than the channel coefficient corresponding to the least time delay, the summation being specific to a branch-start state in a trellis. The summation is combined with different stored differences in a calculation of branch metrics leading to different branch-end states in the trellis.
REFERENCES:
patent: 5127025 (1992-06-01), Okanoue
patent: 5263033 (1993-11-01), Seshadri
patent: 5475713 (1995-12-01), Bremer et al.
patent: 6097753 (2000-08-01), Ko
patent: 6275525 (2001-08-01), Bahai et al.
patent: 6341360 (2002-01-01), Abdelilah et al.
patent: 6381267 (2002-04-01), Abdelilah et al.
patent: 6389064 (2002-05-01), Dholakia et al.
patent: 6426972 (2002-07-01), Endres et al.
patent: 6487243 (2002-11-01), Hwang et al.
patent: 6505222 (2003-01-01), Davis et al.
patent: 6658071 (2003-12-01), Cheng
patent: 6665336 (2003-12-01), Abdelilah et al.
patent: 6707849 (2004-03-01), Zangi et al.
patent: 6744814 (2004-06-01), Blanksby et al.
patent: 6792040 (2004-09-01), Davis et al.
patent: 7003030 (2006-02-01), Abdelilah et al.
patent: 7254190 (2007-08-01), Kwentus et al.
patent: 7277506 (2007-10-01), Pope et al.
patent: 2002/0083396 (2002-06-01), Azadet et al.
patent: 2005/0038841 (2005-02-01), Nair et al.
patent: 2005/0105658 (2005-05-01), Haratsch
patent: 2005/0135522 (2005-06-01), Becker
patent: 2005/0147182 (2005-07-01), Lee et al.
patent: 2006/0146963 (2006-07-01), Valadon
patent: 1 427 159 (2004-06-01), None
patent: WO 00/10299 (2000-02-01), None
patent: WO 00/44141 (2000-07-01), None
patent: WO 03/041349 (2003-03-01), None
Edell Shapiro & Finnan LLC
File Erin
Ha Dac
MStar France SAS
MStar Semiconductor Inc.
LandOfFree
Metrics calculations utilising pre-stored values does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Metrics calculations utilising pre-stored values, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metrics calculations utilising pre-stored values will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4260204