Ana González
System Level Integration, Acreo AB, Sweden
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Published in: GigaHertz 2003. Proceedings from the Seventh Symposium
Linköping Electronic Conference Proceedings 8:41, p.
Published: 2003-11-06
ISBN:
ISSN: 1650-3686 (print), 1650-3740 (online)
In this paper; the performances of various bias classes of Power Amplifiers (PA) working in 802.11a transmitters are presented. Computer simulations of a complete 802.11a transmitter have been made in order to investigate the PA efficiency and Adjacent Channel Power Ratio (ACPR) at the output of the non-linear PA. A high-level power amplifier model is used to model the different classes of amplifiers (class A; class B; class AB and class C) according to the conduction angle at the output signal of the PA. Other behaviors given in real amplifiers; such as the saturation level and compression near saturation are modeled as well. Results of PA efficiency; ACPR and output spectra are presented.
[1] A. D. S. Jayalath and C. Tellambura; “ Peak-to- Average Ratio of IEEE 802.11a PHY Layer Signals;” School of Computer Science and Software Engineering; Monash University.
[2] IEEE Std 802.11a-1999 (supplement to IEEE Std 802.11-1999); “Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer PHYSpecifications: High Speed Physical Layer in 5 GHz Band;” tech. Rep.; IEEE; Sept. 1999.
[3] Jim Wight; “ Transmitter and Receiver Architecture Issues for High-Performance OFDM WLAN Radios;” Communication Design Conference; P211: Advanced RF Design Techniques and Technologies.
[4] Peter B. Kenington; High Linearity RF Amplifier Design: Artech House Publishers; 2000.
[5] C.Rapp; “Effects of HPA-nonlinearity on a 4-DPSK/OFDM-signal for a digital sound broadband system;” presented at Proceedings of the Second European Conference on Satellite Communications.;1991
[6] C. Tellambura; Member IEEE; “Computation of the Continuous –Time PAR of an OFDM Signal with BPSK Subcarriers”; 1089-7798/01; IEEE; 2001.
