Title :
Adaptive linearization technique for a multi-port amplifier
Author :
Kaho, Takana ; Yamaguchi, Yo ; Nakagawa, Tadao ; Araki, Kiyomichi
Author_Institution :
NTT Corp., Yokosuka
Abstract :
We propose a novel adaptive linearization technique for amplifier arrays. It can miniaturize the array-antenna system. The technique uses the specific intermodulation distortions (IMDs) at the output ports in the array. The detected IMD power level can be used to optimize the linearizer´s characteristics. This paper describes the principles, verified both experimentally and mathematically for a 4-port amplifier array. The proposed technique will be a viable solution for multi-user MIMO OFDM downlink systems.
Keywords :
MIMO systems; OFDM modulation; amplifiers; antenna arrays; intermodulation distortion; linearisation techniques; 4-port amplifier array; adaptive linearization technique; array-antenna system; multi-user MIMO OFDM downlink systems; multiport amplifier; specific intermodulation distortions; Adaptive arrays; Adaptive systems; Antenna arrays; Delay lines; Detectors; High power amplifiers; Linear antenna arrays; Linearization techniques; MIMO; Power amplifiers; IMD; MIMO; OFDM; adaptive compensation; amplifier; array antenna; linearization;
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
DOI :
10.1109/APMC.2006.4429557
