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RF power amplifier linearization through amplitude and phase predistortion

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3 Author(s)
D'Andrea, A.N. ; Dept. of Inf. Eng., Pisa Univ., Italy ; Lottici, V. ; Reggiannini, R.

This paper presents a novel technique for power amplifier linearization in digital microwave radio systems. The proposed technique is based on the use of a predistortion circuit, whose AM/AM and AM/PM responses are separately implemented as polynomial approximations of the respective responses of the ideal linearizer. The proposed scheme is shown to attain superior performance in comparison with other well-known predistortion structures, such as those based on the cancellation of third or fifth order distortion, with no substantial aggravation in implementation complexity

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Communications, IEEE Transactions on  (Volume:44 ,  Issue: 11 )