Optimal decision metric approximation in bit-soft decisions

Details Optimal decision metric approximation in bit-soft decisions Optimal decision metric approximation in bit-soft decisions

2006-11-21

2006-11-21

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S316000, C375S324000

Reexamination Certificate

active

07139335

ABSTRACT:
Optimal decision metric approximation in bit-soft decisions. The present invention provides for calculation of the decision metrics/branch metrics for determining whether an incoming analog signal should be transformed into a 1 or a 0 in the digital realm. In performing these decisions, there is some probability associated with the decision to map the incoming signal to a value of 1 or 0. These decisions made in extracting bits from a particular symbol are typically referred to as bit-soft decisions. In making these bit-soft decisions, decoders commonly use decision metrics/branch metrics as mentioned above. Whereas prior art approaches typically are very computationally intensive to calculate these values, the present invention provides for a much improved and simplified calculation of decision metrics/branch metrics that may be used in bit-soft decisions. The optimal metric approximation may be implemented using a few mathematical operations and simple comparison logic circuitry.

REFERENCES:
patent: 5396518 (1995-03-01), How
patent: 6594318 (2003-07-01), Sindhushayana
patent: 2001/0008022 (2001-07-01), Kokuryo et al.
patent: 2001/0029596 (2001-10-01), Kim et al.
patent: 2003/0123582 (2003-07-01), Kim et al.
Ayanoglu “Broadband Wireless Internet Forum presentation” Jun. 25, 2001 WCAI, pp. 1-15.
Ayanoglu, “Broadband Wireless Internet Forum white paper:VOFDM Broadband Wireless Transmission and Its Advantages over single Carrier Modulation”, BWIF Dec. 15, 2000, pp. 1-35.

Affiliated with

Also associated with

Rating

Optimal decision metric approximation in bit-soft decisions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optimal decision metric approximation in bit-soft decisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimal decision metric approximation in bit-soft decisions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3633145