Title :
Proposal of transmitter architecture for mobile terminals employing EER power amplifier
Author :
Suzuki, May ; Yamawa, Taizo ; Tanoue, Tomonori ; Ookuma, Yasuyuki ; Fujiwara, Ryosuke ; Tanaka, Satoshi
Author_Institution :
Central Reseach Lab., Hitachi Ltd., Tokyo, Japan
Abstract :
New transmitter architecture employing EER (envelope elimination and restoration) method is proposed for mobile terminals. The effectiveness of the proposed architecture is evaluated by power efficiency estimation using theoretical models. The results showed its potential to gain three times higher average power efficiency as compared to that of conventional linear amplification architecture in WLAN (IEEE 802.11a) system. It accounts for 40% reduction in power dissipation. Intermodulation distortion of EER method is also evaluated. System parameters are fitted to the specifications of W-CDMA and WLAN.
Keywords :
broadband networks; code division multiple access; intermodulation distortion; mobile radio; power amplifiers; radio transmitters; telecommunication terminals; wireless LAN; IEEE 802.11a; W-CDMA; WLAN system; envelope elimination; envelope restoration; linear amplification architecture; mobile terminals; power amplifier; transmitter architecture; Estimation theory; Intermodulation distortion; Multiaccess communication; Power amplifiers; Power dissipation; Power system modeling; Power system restoration; Proposals; Transmitters; Wireless LAN;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1207843
