Title :
Envelope Currents Method with Extended Dynamic Range for the Simulation of Nonlinear Communication Circuits
Author :
Crespo-Cadenas, Carlos ; Reina-Tosina, Javier
Author_Institution :
Dept. IngenierÃ\xada Electróonica. Area de TeorÃ\xada de la Señal y Comunicaciones, Escuela Superior de Ingenieros. University of Seville, Camino de los Descubrimientos, s/n, 41092 ¿ Seville (Spain). Telephone: (34) 954487336. Fax: (34) 954487373. Emai
Abstract :
A novel approach to analyze the effects of non-linear distortion in communication circuits is reported based on a recursive algorithm. In each iteration a time-varying linear circuit excited by appropriate nonlinear currents obtained from an expansion of the nonlinearity is analyzed. This procedure has been applied to a common-source HEMT amplifier excited with a single tone and results show a very fast convergence together with a high dynamic range. The technique was used in the evaluation of the spectral regrowth and constellation distortion of a QPSK signal with raised cosine and root raised cosine conforming pulses produced by the amplifier at 5.8 GHz
Keywords :
Algorithm design and analysis; Circuit simulation; Constellation diagram; Convergence; Dynamic range; HEMTs; Linear circuits; Nonlinear distortion; Pulse amplifiers; Quadrature phase shift keying;
Conference_Titel :
Microwave Conference, 2003 33rd European
Conference_Location :
Munich, Germany
Print_ISBN :
1-58053-834-7
DOI :
10.1109/EUMA.2003.341066
