Three-tone characterization of nonlinear memory effects in radio-frequency power amplifiers

被引：20

作者：

Ronnow, Daniel ^{[1
]}

Wisell, David ^{[2
]}

Isaksson, Magnus ^{[3
]}

机构：

[1] WesternGeco AS, Oslo, Norway

[2] Ericsson AB, S-80006 Gavle, Sweden

[3] Univ Gavle, Dept Elect, S-80716 Gavle, Sweden

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2007年 / 56卷 / 06期

关键词：

behavioral model; nonlinear; power amplifier (PA); radio frequency (RF); symmetry properties; Volterra kernel;

D O I：

10.1109/TIM.2007.907958

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A stepped three-tone measurement technique based on digitally modulated baseband signals is used in characterizing radio-frequency power amplifiers (PAs). The bandwidths of the stepped measurement were 8.8 MHz for the input signal and 26.4 MHz for the output signal. A PA designed for third-generation mobile telecommunication system was analyzed. The amplitude and phase of the third-order Volterra kernel were determined from the identified intermodulation products. The properties of the Volterra kernel along certain paths in the 3-D frequency space were analyzed and compared to some box models for non-linear systems. The main symmetry of the third-order Volterra kernel of this PA was found to be of the type given by the cascaded quadratic nonlinearities with a linear filter in between (a Hammerstein-Wiener system), and frequency dependence, i.e., memory effects, was found to be due to the effects at the baseband.

引用

页码：2646 / 2657

页数：12

共 40 条

[1] Analytical expressions for intermodulation distortion of a MESFET small-signal amplifier using the nonlinear Volterra series [J].