An application of a digital predistortion linearizer to CDMA HPA's

Sungbin Im Sungbin Im,E.j Powers

doi:10.1109/glocom.2004.1379100

An application of a digital predistortion linearizer to CDMA HPA's

Sungbin Im Sungbin Im, E.j Powers

https://doi.org/10.1109/glocom.2004.1379100

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Publication Date: Nov 29, 2004

Citations: 3

Affiliation: Soongsil University, The University of Texas at Austin

#High Power Amplifier #Intermodulation Distortion + Show 8 more

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Abstract

The high power amplifier (HPA) is a key part of the transmit chain, but inherently nonlinear. Nonlinearity of the HPA causes intermodulation distortion (IMD). In order to compensate for the IMD, linearization techniques are required. Digital predistortion is one such technique. In this paper, we present an overview of the digital predistortion linearizer that we developed and the experimental results of applying this linearizer to an HPA for IS-95. The experimental results show that the developed linearizer effectively suppresses the IMD by 7 to 10 dB depending on the signal bandwidth.

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