New linearization method using interstage second harmonic enhancement

Author

Jing, Dong ; Chan, Wing Shing ; Li, Shi Man ; Li, Chung Wai

Author_Institution

Dept. of Electron. Eng., Hong Kong Univ., Hong Kong

Volume

8

Issue

11

fYear

1998

fDate

11/1/1998 12:00:00 AM

Firstpage

402

Lastpage

404

Abstract

Efficient use of the frequency spectrum necessitates the use of modulation formats such as π/4-DQPSK, which requires linear amplification to minimize spectral regrowth. A new linearization technique is presented that allows a more efficient operation of these linear amplifiers by combining both the advantage of the transparent nature of feed-forward linearization with the efficiency of feedback linearization. The method of convolution is used to analyze the amplifier characteristics and to determine how linearization can be achieved. This method is verified experimentally and proves that by careful use of the second harmonic component, a new method of linearization has been realized

Keywords

convolution; differential phase shift keying; linearisation techniques; power amplifiers; quadrature phase shift keying; π/4-DQPSK modulation; convolution; interstage second harmonic enhancement; linear amplifier; linearization; spectral regrowth; Chirp modulation; Convolution; Feedback; Fourier transforms; Harmonic analysis; Linearization techniques; Microwave amplifiers; Power amplifiers; Spectral analysis; Wireless communication;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.736261

Filename

736261