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A pipelined baseband digital predistortion architecture for RF amplifier linearization



Graduation date: 1996This thesis describes the design of a baseband digital predistortion\ud architecture for radio frequency (RF) amplifier linearization. Existing amplifier\ud linearization techniques are first examined. The nonlinearity of an amplifier can\ud be characterized as amplitude-to-amplitude distortion and amplitude-to-phase\ud distortion. The distortion can be corrected by providing a predistorted driver\ud signal (both in amplitude and phase) to the amplifier. This counteracts the\ud nonlinearity of the amplifier so that the overall system is more linear. A\ud pipelined predistortion architecture is designed to allow fast processing speed,\ud and is capable of providing linearization for a bandwidth of 25 Mhz. The\ud simulation results show significant improvement in amplifier's performance\ud using predistortion technique. The system bandwidth versus cost is examined\ud by using commercially available components

Year: 1995
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Provided by: ScholarsArchive@OSU
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