Digital controlled adaptive feedforward amplifier for IMT-2000 band

Youngoo Yang; Youngsik Kim; Jeahyok Yi; Joongjin Nam; Bumman Kim; Wonwoo Kang; Shinwook Kim

Digital controlled adaptive feedforward amplifier for IMT-2000 band

Youngoo Yang
, Youngsik Kim
, Jeahyok Yi
, Joongjin Nam
, Bumman Kim
, Wonwoo Kang
, Shinwook Kim

Pohang University of Science and Technology

Research output: Contribution to journal › Conference article › peer-review

20 Scopus citations

Abstract

We present a broad-band adaptive control method for IMT-2000 band multi-carrier power amplifiers adopting feedforward linearization. We have analyzed and implemented an error cancellation detection method employing a frequency hopping pilot and IF synchronous sampling correlator with DSP controller. An adaptive delta-modulated power gradient algorithm is used to adjust the signal and error cancellation loop control parameters. A 2.15 GHz feedforward power amplifier with digital controller is implemented. Band test results show that it covers over a 90 MHz band with more than 50 dBc of IMD at 5 MHz offset frequency for an 8.3 MHz WCDMA signal. The adaptation result shows very fast convergence.

Original language	English
Pages (from-to)	1487-1490
Number of pages	4
Journal	IEEE MTT-S International Microwave Symposium Digest
Volume	3
State	Published - 2000
Externally published	Yes
Event	Proceedings of the 1999 IEEE MTT-S International Microwave Symposium - Boston, MA, USA Duration: 11 Jun 2000 → 16 Jun 2000

Cite this

@article{0f35b7b4915a4afabf9e69f580abae5b,

title = "Digital controlled adaptive feedforward amplifier for IMT-2000 band",

abstract = "We present a broad-band adaptive control method for IMT-2000 band multi-carrier power amplifiers adopting feedforward linearization. We have analyzed and implemented an error cancellation detection method employing a frequency hopping pilot and IF synchronous sampling correlator with DSP controller. An adaptive delta-modulated power gradient algorithm is used to adjust the signal and error cancellation loop control parameters. A 2.15 GHz feedforward power amplifier with digital controller is implemented. Band test results show that it covers over a 90 MHz band with more than 50 dBc of IMD at 5 MHz offset frequency for an 8.3 MHz WCDMA signal. The adaptation result shows very fast convergence.",

author = "Youngoo Yang and Youngsik Kim and Jeahyok Yi and Joongjin Nam and Bumman Kim and Wonwoo Kang and Shinwook Kim",

year = "2000",

language = "English",

volume = "3",

pages = "1487--1490",

journal = "IEEE MTT-S International Microwave Symposium Digest",

issn = "0149-645X",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

note = "Proceedings of the 1999 IEEE MTT-S International Microwave Symposium ; Conference date: 11-06-2000 Through 16-06-2000",

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TY - JOUR

T1 - Digital controlled adaptive feedforward amplifier for IMT-2000 band

AU - Yang, Youngoo

AU - Kim, Youngsik

AU - Yi, Jeahyok

AU - Nam, Joongjin

AU - Kim, Bumman

AU - Kang, Wonwoo

AU - Kim, Shinwook

PY - 2000

Y1 - 2000

N2 - We present a broad-band adaptive control method for IMT-2000 band multi-carrier power amplifiers adopting feedforward linearization. We have analyzed and implemented an error cancellation detection method employing a frequency hopping pilot and IF synchronous sampling correlator with DSP controller. An adaptive delta-modulated power gradient algorithm is used to adjust the signal and error cancellation loop control parameters. A 2.15 GHz feedforward power amplifier with digital controller is implemented. Band test results show that it covers over a 90 MHz band with more than 50 dBc of IMD at 5 MHz offset frequency for an 8.3 MHz WCDMA signal. The adaptation result shows very fast convergence.

AB - We present a broad-band adaptive control method for IMT-2000 band multi-carrier power amplifiers adopting feedforward linearization. We have analyzed and implemented an error cancellation detection method employing a frequency hopping pilot and IF synchronous sampling correlator with DSP controller. An adaptive delta-modulated power gradient algorithm is used to adjust the signal and error cancellation loop control parameters. A 2.15 GHz feedforward power amplifier with digital controller is implemented. Band test results show that it covers over a 90 MHz band with more than 50 dBc of IMD at 5 MHz offset frequency for an 8.3 MHz WCDMA signal. The adaptation result shows very fast convergence.

UR - https://www.scopus.com/pages/publications/0033694045

M3 - Conference article

AN - SCOPUS:0033694045

SN - 0149-645X

VL - 3

SP - 1487

EP - 1490

JO - IEEE MTT-S International Microwave Symposium Digest

JF - IEEE MTT-S International Microwave Symposium Digest

T2 - Proceedings of the 1999 IEEE MTT-S International Microwave Symposium

Y2 - 11 June 2000 through 16 June 2000

ER -

Digital controlled adaptive feedforward amplifier for IMT-2000 band

Abstract

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