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

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

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish
Title of host publicationProceedings of the 36th European Microwave Conference, EuMC 2006
Pages137-140
Number of pages4
DOIs
Publication statusPublished - 2007
Externally publishedYes
Event36th European Microwave Conference, EuMC 2006 - Manchester
Duration: 2006 Sep 102006 Sep 12

Other

Other36th European Microwave Conference, EuMC 2006
CityManchester
Period06/9/1006/9/12

Fingerprint

delta modulation
Delta modulation
transmitters
Transmitters
envelopes
amplifiers
Quantization (signal)
clocks
Modulators
Amplification
modulators
Clocks
CMOS

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

Cite this

Kunihiro, K., Takahashi, K., Yamanouchi, S., Hirayama, T., Hida, H., & Tanaka, S. (2007). 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] 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, Shinichi.

Proceedings of the 36th European Microwave Conference, EuMC 2006. 2007. p. 137-140 4057766.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kunihiro, K, Takahashi, K, Yamanouchi, S, Hirayama, T, Hida, H & Tanaka, S 2007, 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, pp. 137-140, 36th European Microwave Conference, EuMC 2006, Manchester, 06/9/10. https://doi.org/10.1109/EUMC.2006.281219
Kunihiro K, Takahashi K, Yamanouchi S, Hirayama T, Hida H, Tanaka S. A polar transmitter using a linear-assisted delta-modulation envelope-amplifier for WCDMA applications. In Proceedings of the 36th European Microwave Conference, EuMC 2006. 2007. p. 137-140. 4057766 https://doi.org/10.1109/EUMC.2006.281219
Kunihiro, Kazuaki ; Takahashi, Kiyohiko ; Yamanouchi, Shingo ; Hirayama, Tomohisa ; Hida, Hikaru ; Tanaka, Shinichi. / A polar transmitter using a linear-assisted delta-modulation envelope-amplifier for WCDMA applications. Proceedings of the 36th European Microwave Conference, EuMC 2006. 2007. pp. 137-140
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