IEEE Microwave and Wireless Components Letters · 2011 · 66 citations · 8 references
EngineeringCommunicationElectrical EngineeringAnalog ElectronicsMicrowave EngineeringWireless CommunicationsDigital Signal ProcessingDistortion AnalysisLinear Circuit AnalysisMicrowave AmplifiersPower AmplifiersSmall-signal AnalysisDistortion ReductionLinear Power AmplifiersLinearity EnhancementLinearizationPower Amplifier DesignPower Amplifier NonlinearityPredistortionPredistortion Linearization
This letter reports a two-dimensional digital predistortion technique to compensate for the nonlinearity of a concurrent dual band PA. Two different multi-carrier WCDMA signals with more than 1 GHz frequency spacing are concurrently employed to drive the PA and verify the linearization performance. Experimental results show that the proposed technique bounds the adjacent channel power ratio to lower than -46 dBc, which is more than 12 dB improvement for both bands concurrently.
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