Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2006-01-10
2006-01-10
Baker, Stephen M. (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
Reexamination Certificate
active
06986096
ABSTRACT:
Soft metrics for multiple bursts transmitted at different times for a data packet are scaled, quantized, and rescaled prior to decoding. As each burst is received, input soft metrics for the burst are scaled with a scaling factor S(i), quantized based on a quantization scale factor Q(i), and stored in a buffer. The scaling factor and quantization scale factor are computed based on the statistics for the burst. After all bursts for the data packet have been received, the quantized soft metrics for each burst are rescaled based on the quantization scale factor Q(i) for that burst and a common scale factor to properly weight the soft metrics in the decoding process. The common scale factor is determined based on the quantization scale factors Q(i) for all bursts. The rescaled soft metrics for all bursts are requantized, deinterleaved, and decoded to obtain decoded data for the packet.
REFERENCES:
patent: 5271042 (1993-12-01), Borth et al.
patent: 1187344 (2002-03-01), None
Reed, et al., “Iterative Multiuser Detection for CDMA with FEC: Near-Single-User Performance”, IEEE Transactions on Communications, vol. 46, No. 12, Dec. 1998, pp. 1693-1699.
Y.K. Lee et al: “Normalization, windowing and quantization of soft-decision Viterbi decoder inputs in CDMA”; Vehicular Technology Conference, 1999 IEEE 49thHouston, TX, May 16, 1999, pp. 221-225.
Chaudhuri Arunava
Nadakuditi Raj
Baker Stephen M.
Brown Charles D.
QUALCOMM Incorporated
Seo Howard H.
Wadsworth Philip R.
LandOfFree
Scaling and quantizing soft-decision metrics for decoding does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scaling and quantizing soft-decision metrics for decoding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scaling and quantizing soft-decision metrics for decoding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3560565