DocumentCode
1890004
Title
A 10MHz signal bandwidth Cartesian-loop transmitter capable of off-chip PA linearization
Author
Ishihara, H. ; Hosoya, M. ; Otaka, S. ; Watanabe, Osamu
fYear
2010
fDate
7-11 Feb. 2010
Firstpage
66
Lastpage
67
Abstract
This paper presents a wide signal bandwidth Cartesian loop transmitter (CLT) for off-chip PA linearization. The CLT can linearize a 10 MHz bandwidth signal by using a feedforward technique to avoid instability caused by a time delay of an RF path. ACLR is improved from 30.2 dB to 38.4 dB and EVM is improved from 5.9% to 1.6% when a 10 MHz 64-QAM 802.16e signal is applied.
Keywords
feedforward; linearisation techniques; metropolitan area networks; power amplifiers; quadrature amplitude modulation; 802.16e; QAM; feedforward technique; frequency 10 MHz; noise figure 30.2 dB to 38.4 dB; off-chip PA linearization; signal bandwidth Cartesian-loop transmitter; Bandwidth; Calibration; Circuits; Delay effects; Filters; Frequency response; Passband; RF signals; Radio frequency; Transmitters;
fLanguage
English
Publisher
ieee
Conference_Titel
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2010 IEEE International
Conference_Location
San Francisco, CA
ISSN
0193-6530
Print_ISBN
978-1-4244-6033-5
Type
conf
DOI
10.1109/ISSCC.2010.5434046
Filename
5434046
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