DocumentCode
2730468
Title
Nonlinear amplification of CDMA waveforms: an analysis of power amplifier gain errors and spectral regrowth
Author
Braithwaite, R. Neil
Author_Institution
Hewlett-Packard Co., Palo Alto, CA, USA
Volume
3
fYear
1998
fDate
18-21 May 1998
Firstpage
2160
Abstract
The effect of nonlinear amplification on CDMA waveforms is investigated. Variations in the gain of the power amplifier (PA) in response to changes in the input power are used as a measure of the nonlinearity. The relationship between Walsh code selection, data sequences, PN sequences, and the wave-shaping filter in the generation of PA gain errors is discussed. An approach for reducing spectral regrowth by introducing correlations between data sequences within different Walsh code channels is proposed
Keywords
Walsh functions; code division multiple access; error analysis; power amplifiers; pseudonoise codes; sequences; CDMA waveforms; PN sequences; Walsh code channels; Walsh code selection; correlations; data sequences; input power; nonlinear amplification; power amplifier gain errors; spectral regrowth; wave-shaping filter; Baseband; Filters; Gain measurement; Interference; Modulation coding; Multiaccess communication; Nonlinear distortion; Power amplifiers; RF signals; Radio frequency;
fLanguage
English
Publisher
ieee
Conference_Titel
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location
Ottawa, Ont.
ISSN
1090-3038
Print_ISBN
0-7803-4320-4
Type
conf
DOI
10.1109/VETEC.1998.686140
Filename
686140
Link To Document