Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Patent
1997-04-30
2000-07-25
De Cady, Albert
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
370333, G06F 1100
Patent
active
060947403
ABSTRACT:
In a communication network, a method for channel quality estimation, without the need for a reference (uncorrupted) signal, comprises the steps of: processing a received signal utilizing a non-redundant error correction scheme to observe at least one symbol; producing an error signal in response to the observation; and counting a quantity of the error signal during a predetermined time interval to provide a symbol error count. A device for channel quality estimation, without the need for a reference (uncorrupted) signal, is also described.
REFERENCES:
patent: 4128828 (1978-12-01), Samejima et al.
Freebersyser, James et al., Non-Redundant Error Correction of Uncoded M-DPSK Using a Modified Viterbi Algorithm and a Sliding Block Non-Coherent Multiple-Symbol Detector, IEEE, 1994.
Wong et al., Nonredundant Error Correction DQPSK for the Aeronautical-Satellite Channel, Jan. 1995, IEEE pp. 168 to 181.
Yang et al., An Improved II/4 QPSK with Nonredundant Error Correction for Satellite Mobile Broadcasting, Mar. 1991, IEEE, pp. 9 to 16.
Wong et al., Nonredundant Error Correction analysis and Evaluation of differentially detected II/4 shift DQPSK system in a Combined CCI and AWGN Environment, Feb. 1992, IEEE. pp. 35 to 48.
Boccuzzi Joseph
Petrus Paul
Cady Albert De
Chase Shelly A
Lucent Technologies Inc
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