Selective signal demodulation method and apparatus

Details Selective signal demodulation method and apparatus Selective signal demodulation method and apparatus

2011-08-16

2011-08-16

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S136000, C375S142000, C375S147000, C375S316000, C375S346000, C375S349000

Reexamination Certificate

active

08000413

ABSTRACT:
Signal quality estimation and demodulation are tailored to the received signal quality. According to one embodiment, a received signal is processed by determining a first set of combining weights based on a first impairment covariance estimate derived assuming a low signal quality environment. A second set of combining weights is determined based on a second impairment covariance estimate derived assuming a high signal quality environment. A metric is determined corresponding to the difference between symbol estimates derived from the second set of combining weights and hard symbol decisions. The received signal is demodulated based on the second set of combining weights if the metric satisfies a threshold indicating high signal quality and otherwise based on the first set of combining weights.

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