Title :
A LINC amplifier utilizing digital signal processing applied to a DAMPS system
Author :
Alkuran, Mohammad
Author_Institution :
ANADIGICS Inc., Warren, NJ
Abstract :
This paper is about implementing a LINC amplifier utilizing DSP in a DAMPS wireless system. First, the theory behind LINC amplifiers is presented. Then the I-Q representation of signals is studied. Followed by a look at pi/4 QPSK schemes. Then, wepsilall show how to apply a LINC amplifier to a pi/4 QPSK modulation scheme in a digital environment, and give the equivalent RF circuit. The digital concerns related to that procedure are then studied. Finally, a prototype system will be presented. Computer simulation of this system and the proposed implementation are both presented.
Keywords :
digital signal processing chips; equivalent circuits; mobile handsets; quadrature phase shift keying; radiofrequency amplifiers; DAMPS system; DSP; I-Q representation; LINC amplifier; digital advanced mobile phone system; digital signal processing; equivalent RF circuit; linear amplification using nonlinear components; pi/4 QPSK modulation scheme; wireless system; Application software; Cellular phones; Digital signal processing; Energy consumption; High power amplifiers; Microwave frequencies; Power amplifiers; Quadrature phase shift keying; Radio frequency; Radiofrequency amplifiers; DAMPS; DSP; LINC; Linearization; PA; RF;
Conference_Titel :
Systems, Signals and Devices, 2008. IEEE SSD 2008. 5th International Multi-Conference on
Conference_Location :
Amman
Print_ISBN :
978-1-4244-2205-0
Electronic_ISBN :
978-1-4244-2206-7
DOI :
10.1109/SSD.2008.4632841
