By Topic

Analysis of RF-Power Amplifier Modeling Performance using a 16-QAM Modulation over AWGN Channels

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Silveira, D. ; Inst. of Electr. Meas. & Circuit Design, Vienna Univ. of Technol. ; Gadringer, M. ; Mayer, M. ; Magerl, G.

This paper presents the black-box modeling of a microwave power amplifier (PA) and its performance in the nonlinear operation region - low input back off (IBO). As input signal a rectangle 16-QAM corrupted by different levels of additive white Gaussian noise (AWGN) was used. The nonlinearities caused by the amplifier in low IBO operating conditions can change the output constellation and lead to difficulties in finding the correct model parameters, as the black-box identification procedure is based on measured input/output signals. These signals can be altered by different types of noise. The AWGN degrades the signal to noise ratio (SNR) and can lower the model accuracy that should ideally not be influenced. In this paper the models were first estimated using noise-free data (NFD) and secondly with different levels of noisy corrupted data (NCD). NFD was also applied to the models calculated with NCD and vice versa. An investigation of the loss of accuracy caused by the noise in the identified models is presented. Three situations were considered: 6dB IBO, 4dB IBO, and 2dB IBO. It is shown that the pseudo-inverse based models present reasonable results for PA modeling when AWGN is incident

Published in:

Integrated Nonlinear Microwave and Millimeter-Wave Circuits, 2006 International Workshop on

Date of Conference:

30-31 Jan. 2006