Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 29, 2011
Patent Application Number
11816854
Date Filed
February 24, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
An IQ-modulator pre-distorter includes an iteratively updated digital filter (gQ0, gQ1) for filtering one of the branches of an IQ-signal to compensate for IQ-modulator generated amplitude errors. An iteratively updated digital filter (cQI0, cQI1), cross-connected from one of the branches to the other branch, filters one of the components of an IQ-signal to compensate for IQ-modulator generated inter-modulation between the branches. Iteratively updated compensators (dcI, dcQ) counteract IQ-modulator generated offset errors.
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