TY - GEN
T1 - A novel optimization method for nonlinear Bessel-Fourier PA model using an adjusted instantaneous voltage transfer characteristic
AU - O'Droma, Máirtín
AU - Lei, Yiming
PY - 2008
Y1 - 2008
N2 - A novel technique for improving the accuracy of low order Bessel-Fourier (BF) envelope behavioural model of nonlinear power amplifiers (PA) is presented. This technique is based on a special extrapolation of a hypothetical instantaneous voltage transfer (IVT) characteristic derived from a high order accurate BF envelope behavioural model. The extrapolation is optimized 'manually' to reduce the number of coefficients required for an accurate Fourier series model of the IVT, and from this a new 'optimized' BF envelope model which has improved accuracy is then derived. The model construction has been realized in a five-step algorithm. Using various figures of merit, such as average error (AE), normalized mean square error (NMSE), and adjacent channel error power ratio (ACEPR), the performances of low order classical BF model and optimized BF model of an LDMOS PA are compared in their modeling accuracy against measured data when the LDMOS PA is amplifying a 3G WCDMA signal.
AB - A novel technique for improving the accuracy of low order Bessel-Fourier (BF) envelope behavioural model of nonlinear power amplifiers (PA) is presented. This technique is based on a special extrapolation of a hypothetical instantaneous voltage transfer (IVT) characteristic derived from a high order accurate BF envelope behavioural model. The extrapolation is optimized 'manually' to reduce the number of coefficients required for an accurate Fourier series model of the IVT, and from this a new 'optimized' BF envelope model which has improved accuracy is then derived. The model construction has been realized in a five-step algorithm. Using various figures of merit, such as average error (AE), normalized mean square error (NMSE), and adjacent channel error power ratio (ACEPR), the performances of low order classical BF model and optimized BF model of an LDMOS PA are compared in their modeling accuracy against measured data when the LDMOS PA is amplifying a 3G WCDMA signal.
UR - http://www.scopus.com/inward/record.url?scp=62349127753&partnerID=8YFLogxK
U2 - 10.1109/EUMC.2008.4751693
DO - 10.1109/EUMC.2008.4751693
M3 - Conference contribution
AN - SCOPUS:62349127753
SN - 9782874870064
T3 - Proceedings of the 38th European Microwave Conference, EuMC 2008
SP - 1269
EP - 1272
BT - Proceedings of the 38th European Microwave Conference, EuMC 2008
T2 - 38th European Microwave Conference, EuMC 2008
Y2 - 27 October 2008 through 31 October 2008
ER -