Voting system for improving the performance of single-user...

Details Voting system for improving the performance of single-user... Voting system for improving the performance of single-user...

2008-03-25

2008-03-25

Chase, Shelly (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C375S341000

Reexamination Certificate

active

07350136

ABSTRACT:
A system is presented that provides real-time performance for iterative multi-user detectors, such as Turbo MUDs, which are used to separate simultaneous transmissions on the same frequency, by permitting the MUD to use a less computationally intense, fast-processing algorithm and to correct for errors caused by the fast processing. In order to reduce the errors, a voting system is coupled to the output of the multi-user detector within the iterative system. The voting system provides confidence values on a bit-by-bit basis for the estimates made by the multi-user detector, with the confidence values then being utilized as soft inputs to a bank of conventional single-user decoders.

REFERENCES:
patent: 2002/0037737 (2002-03-01), Learned
Alexander, Paul D.; Reed, Mark C.; Asenstorfer, John A.; Schlagel, Christian B., “Iterative Multi-User Interference Reduction: Turbo CDMA.”IEEE Transactions On Communications, vol. 47, No. 7, Jul. 1999.

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