Title :
Amplifier linearization for the local multipoint distribution system application
Author :
Muhonen, Kathleen ; Kavehrad, Mohsen
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
The deployment of the local multipoint distribution systems (LMDS) is not too far off in the future. Challenging milestones are now being tackled, such as the design of the hub and end user transmitter amplifier. The design goals placed on this amplifier at 28 GHz make linearization an inevitable choice. Of the published linearization techniques, the feedback+feedforward design shows the most promising solution for an LMDS implementation. This design is adaptive, offers fairly simple implementation, and does not decrease the overall gain of the amplifier as a typical feedback system does. Since designing an amplifier for linearity and gain is difficult at 28 GHz, sacrificing gain will only make problems worse. This technique is a solution to the feedback dilemma and is effective in reducing distortion
Keywords :
feedback amplifiers; feedforward; linearisation techniques; microwave links; microwave power amplifiers; radio transmitters; 28 GHz; LMDS; SHF; amplifier linearization; distortion reduction; end user transmitter amplifier; feedback system; feedback+feedforward design; gain; hub design; local multipoint distribution system; power amplifiers; Base stations; Distributed amplifiers; Feedback; Linearization techniques; Nonlinear distortion; Operational amplifiers; Power amplifiers; Power generation; Radio transmitters; Radiofrequency amplifiers;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4872-9
DOI :
10.1109/PIMRC.1998.734342
