Soft sample scaling in a turbo decoder

Details Soft sample scaling in a turbo decoder Soft sample scaling in a turbo decoder

2008-03-04

2008-03-04

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S341000, C375S130000, C375S148000, C370S476000, C327S349000

Reexamination Certificate

active

07340013

ABSTRACT:
A receiver for iterative decoding of a received, encoded signal employs slot-based scaling of soft samples. Iterative decoding employs a constituent maximum a priori (MAP) decoder for each constituent encoding of information of the encoded signal. Root mean square (RMS) values for soft samples over a slot are selected for dynamic range scaling. Squared RMS values are combined and equal the squared RMS value for a frame multiplied by a control constant, and this relationship may be employed to derive scaling constants for each slot. Alternatively, the square root of the RMS value multiplied by a constant serves as an SNR estimator that may be employed to scale samples to reduce dynamic range and modify logarithmic correction values for max* term calculation during log-MAP decoding.

REFERENCES:
patent: 6377607 (2002-04-01), Ling et al.
patent: 6393076 (2002-05-01), Dinc et al.
patent: 7042929 (2006-05-01), Pan et al.
patent: 2004/0071231 (2004-04-01), Lin et al.
patent: 2004/0076184 (2004-04-01), Tene et al.
T.Fujiwara, A TD-CDMA Data Collection System for City Lifeline Monitoring, 2000, IEEE, 1630-1635.

Affiliated with

Also associated with

Rating

Soft sample scaling in a turbo decoder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Soft sample scaling in a turbo decoder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soft sample scaling in a turbo decoder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2805028