A polar transmitter using a linear-assisted delta-modulation envelope-amplifier for WCDMA applications

Kazuaki Kunihiro; Kiyohiko Takahashi; Shingo Yamanouchi; Tomohisa Hirayama; Hikaru Hida; Shin Ichi Tanaka

doi:10.1109/EUMC.2006.281219

A polar transmitter using a linear-assisted delta-modulation envelope-amplifier for WCDMA applications

Kazuaki Kunihiro, Kiyohiko Takahashi, Shingo Yamanouchi, Tomohisa Hirayama, Hikaru Hida, Shin Ichi Tanaka

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

7 Citations (Scopus)

Abstract

A polar transmitter using a new linear-assisted delta-modulation (LADM) envelope-amplifier has been developed for WCDMA applications. The LADM system is composed of a highly efficient switching block based on a 200-MHz-clock delta-modulator, which is implemented in a 0.18-μm CMOS IC, and a highly accurate linear block. In the LADM approach, the residual quantization noise and distortion of switching amplification are removed through the assistant linear process; thus, a sufficiently low ACPR of -45 dBc and a small EVM of 1.7% can be achieved without a pre-distortion technique. The developed polar transmitter nearly doubles the average efficiency in the 10- to 15-dB back-off region of class-AB PAs.

Original language	English
Title of host publication	Proceedings of the 36th European Microwave Conference, EuMC 2006
Publisher	IEEE Computer Society
Pages	137-140
Number of pages	4
ISBN (Print)	2960055160, 9782960055160
DOIs	https://doi.org/10.1109/EUMC.2006.281219
Publication status	Published - 2006 Jan 1
Externally published	Yes
Event	36th European Microwave Conference, EuMC 2006 - Manchester, United Kingdom Duration: 2006 Sep 10 → 2006 Sep 12

Publication series

Name	Proceedings of the 36th European Microwave Conference, EuMC 2006

Conference

Conference	36th European Microwave Conference, EuMC 2006
Country	United Kingdom
City	Manchester
Period	06/9/10 → 06/9/12

Keywords

CMOS
Code division multiple access (CDMA)
Delta modulation
Polar transmitter
Power amplifiers

ASJC Scopus subject areas

Electrical and Electronic Engineering
Condensed Matter Physics
Radiation

Access to Document

10.1109/EUMC.2006.281219

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Cite this

Kunihiro, K., Takahashi, K., Yamanouchi, S., Hirayama, T., Hida, H., & Tanaka, S. I. (2006). A polar transmitter using a linear-assisted delta-modulation envelope-amplifier for WCDMA applications. In Proceedings of the 36th European Microwave Conference, EuMC 2006 (pp. 137-140). [4057766] (Proceedings of the 36th European Microwave Conference, EuMC 2006). IEEE Computer Society. https://doi.org/10.1109/EUMC.2006.281219

A polar transmitter using a linear-assisted delta-modulation envelope-amplifier for WCDMA applications. / Kunihiro, Kazuaki; Takahashi, Kiyohiko; Yamanouchi, Shingo; Hirayama, Tomohisa; Hida, Hikaru; Tanaka, Shin Ichi.

Proceedings of the 36th European Microwave Conference, EuMC 2006. IEEE Computer Society, 2006. p. 137-140 4057766 (Proceedings of the 36th European Microwave Conference, EuMC 2006).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kunihiro, K, Takahashi, K, Yamanouchi, S, Hirayama, T, Hida, H & Tanaka, SI 2006, A polar transmitter using a linear-assisted delta-modulation envelope-amplifier for WCDMA applications. in Proceedings of the 36th European Microwave Conference, EuMC 2006., 4057766, Proceedings of the 36th European Microwave Conference, EuMC 2006, IEEE Computer Society, pp. 137-140, 36th European Microwave Conference, EuMC 2006, Manchester, United Kingdom, 06/9/10. https://doi.org/10.1109/EUMC.2006.281219

Kunihiro K, Takahashi K, Yamanouchi S, Hirayama T, Hida H, Tanaka SI. A polar transmitter using a linear-assisted delta-modulation envelope-amplifier for WCDMA applications. In Proceedings of the 36th European Microwave Conference, EuMC 2006. IEEE Computer Society. 2006. p. 137-140. 4057766. (Proceedings of the 36th European Microwave Conference, EuMC 2006). https://doi.org/10.1109/EUMC.2006.281219

Kunihiro, Kazuaki ; Takahashi, Kiyohiko ; Yamanouchi, Shingo ; Hirayama, Tomohisa ; Hida, Hikaru ; Tanaka, Shin Ichi. / A polar transmitter using a linear-assisted delta-modulation envelope-amplifier for WCDMA applications. Proceedings of the 36th European Microwave Conference, EuMC 2006. IEEE Computer Society, 2006. pp. 137-140 (Proceedings of the 36th European Microwave Conference, EuMC 2006).

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abstract = "A polar transmitter using a new linear-assisted delta-modulation (LADM) envelope-amplifier has been developed for WCDMA applications. The LADM system is composed of a highly efficient switching block based on a 200-MHz-clock delta-modulator, which is implemented in a 0.18-μm CMOS IC, and a highly accurate linear block. In the LADM approach, the residual quantization noise and distortion of switching amplification are removed through the assistant linear process; thus, a sufficiently low ACPR of -45 dBc and a small EVM of 1.7% can be achieved without a pre-distortion technique. The developed polar transmitter nearly doubles the average efficiency in the 10- to 15-dB back-off region of class-AB PAs.",

keywords = "CMOS, Code division multiple access (CDMA), Delta modulation, Polar transmitter, Power amplifiers",

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