A novel wideband active feedback amplifier linearization scheme suitable for handsets

T Nesimoglu; CN Canagarajah; JP McGeehan; RJ Wilkinson

doi:10.1109/VETECS.2000.851564

Abstract

A new active feedback network is proposed for reducing intermodulation distortion (IMD). It is based on using the existing second harmonic zone (SHZ) distortion energy generated by the amplifier to predistort the input signals optimally to obtain a linear output. The technique is analyzed theoretically and practical results demonstrate the linearization performance. The measured two-tone test showed 23-dB reduction in the third-order intermodulation products (IMP3), where π/4 DQPSK and W-CDMA gave up to 15-dB and 13-dB adjacent channel interference (ACI) suppression respectively. This technique differs from available active feedback techniques by performing both with narrow and wideband modulated signals. The linearization circuitry is simple and small in size.

Original language	English
Pages	1712 - 1716
DOIs	https://doi.org/10.1109/VETECS.2000.851564
Publication status	Published - May 2000

Bibliographical note

Sponsorship: The authors would like to acknowledge the Center for Communications Research (CCR), University of Bristol for the provision of laboratory facilities and thank Lucent
Technologies for their financial support.

Terms of use: Copyright © 2000 IEEE. Reprinted from Proceedings of IEEE Vehicular Technology Conference Proceedings, 2000. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected].

By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Name of Conference: 51st Vehicular Technology Conference 2000 (VTC 2000-Spring)
Venue of Conference: Tokyo, Japan

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10.1109/VETECS.2000.851564

Nesimoglu IEEE VTC Spring2000Accepted author manuscript, 122 KB

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Cite this

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title = "A novel wideband active feedback amplifier linearization scheme suitable for handsets",

abstract = "A new active feedback network is proposed for reducing intermodulation distortion (IMD). It is based on using the existing second harmonic zone (SHZ) distortion energy generated by the amplifier to predistort the input signals optimally to obtain a linear output. The technique is analyzed theoretically and practical results demonstrate the linearization performance. The measured two-tone test showed 23-dB reduction in the third-order intermodulation products (IMP3), where π/4 DQPSK and W-CDMA gave up to 15-dB and 13-dB adjacent channel interference (ACI) suppression respectively. This technique differs from available active feedback techniques by performing both with narrow and wideband modulated signals. The linearization circuitry is simple and small in size.",

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note = "Sponsorship: The authors would like to acknowledge the Center for Communications Research (CCR), University of Bristol for the provision of laboratory facilities and thank Lucent Technologies for their financial support. Terms of use: Copyright {\textcopyright} 2000 IEEE. Reprinted from Proceedings of IEEE Vehicular Technology Conference Proceedings, 2000. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it. Name of Conference: 51st Vehicular Technology Conference 2000 (VTC 2000-Spring) Venue of Conference: Tokyo, Japan",

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N1 - Sponsorship: The authors would like to acknowledge the Center for Communications Research (CCR), University of Bristol for the provision of laboratory facilities and thank Lucent Technologies for their financial support. Terms of use: Copyright © 2000 IEEE. Reprinted from Proceedings of IEEE Vehicular Technology Conference Proceedings, 2000. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it. Name of Conference: 51st Vehicular Technology Conference 2000 (VTC 2000-Spring) Venue of Conference: Tokyo, Japan

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