Title :
A wideband architecture for adaptive feedforward linearization
Author :
Smith, Alison M. ; Cavers, James K.
Author_Institution :
Sch. of Eng. Sci., Simon Fraser Univ., Burnaby, BC, Canada
Abstract :
Feedforward linearization has the potential for large operating bandwidths. However, no published work has addressed the two largest hurdles to truly wideband performance: delay mismatch and unwanted frequency dependence of the circuit elements. This paper presents two structural innovations that solve these problems. A prototype has demonstrated up to 40 dB reduction of intermodulation products over a 40 MHz range and 25 dB or more over an 80 MHz range
Keywords :
adaptive signal processing; cellular radio; delays; feedforward; intermodulation; linearisation techniques; personal communication networks; radiofrequency amplifiers; 40 MHz; 80 MHz; adaptive compensation; adaptive delay matching; adaptive feedforward linearization; cellular communication systems; circuit elements; delay mismatch; frequency dependence; frequency variation; intermodulation products reduction; large operating bandwidths; personal communication systems; wideband architecture; wideband performance; Bandwidth; Circuits; Delay; Frequency dependence; Nonlinear distortion; Power amplifiers; Prototypes; RF signals; Technological innovation; Wideband;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.686207
