Title :
Characterizing the effects of nonlinear amplifiers on linear modulation for digital portable radio communications
Author :
Ariyavisitakul, Sirikiat ; Liu, Ting-ping
Author_Institution :
Bellcore, Red Bank, NJ, USA
Abstract :
The design and performance of linear modulation techniques and RF power amplifiers for digital portable radio communications are discussed. Various types of power amplifiers are used in the comparison of out-of-band radiation and power efficiency simulation. The designs focus on high-frequency silicon bipolar power amplifiers suitable for portable radio applications. Two different 4-ary quadrature amplitude modulation schemes are compared. It is shown that power efficiency as high as 40% can be achieved using a dynamically biased amplifier operating near saturation. The effects of nonlinear distortions from power amplifiers on adjacent interference as well as bit and block error rate performance are also investigated
Keywords :
amplitude modulation; digital radio systems; mobile radio systems; power amplifiers; radiofrequency amplifiers; 4-ary quadrature amplitude modulation schemes; 40 percent; BER; QAM; RF power amplifiers; adjacent channel interference; block error rate performance; design; digital portable radio communications; dynamically biased amplifier; linear modulation techniques; near saturation operation; nonlinear amplifiers; out-of-band radiation; power efficiency simulation; Digital modulation; High power amplifiers; Interference; Nonlinear distortion; Power amplifiers; Quadrature amplitude modulation; Radio communication; Radio frequency; Radiofrequency amplifiers; Silicon;
Conference_Titel :
Global Telecommunications Conference and Exhibition 'Communications Technology for the 1990s and Beyond' (GLOBECOM), 1989. IEEE
Conference_Location :
Dallas, TX
DOI :
10.1109/GLOCOM.1989.64012
