Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2005-09-27
2005-09-27
Liu, Shuwang (Department: 2634)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S229000, C375S232000, C375S233000, C375S347000
Reexamination Certificate
active
06950477
ABSTRACT:
An adaptive antenna system includes N antennae, N forward equalizers operatively coupled to a respective one of the N antennae, and N processors performing a constant modulus algorithm (CMA) to thereby generate N respective control signals which adapt coefficients associated with each respective one of the forward equalizer. Preferably, the adaptive antenna system also includes a sampling device receiving a signal based on the collected output of the N forward equalizers, and a feedback equalizer receiving an output of the sampling device and generating a feedback signal biasing the signal received by the sampling device. If desired, the N control signals are applied to the N respective forward equalizers during a first operating mode, and a selected one of the N control signals is applied to the N forward equalizers during second mode of operation. A method of operating a beamforming antenna system is also described.
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patent: 6115419 (2000-09-01), Meehan
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“Selection Diversity with Decision Feedback Equalizer” by Ishikawa et al., KDD R&D Laboratories, 2-1-15 Ohara Kamifukuoka, Saitama 356, Japan.
International Search Report dated May 27, 2002.
Meehan Joseph
Sethares William A
Liu Shuwang
Sofer&Haroun, LLP
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