Proposal of transmitter architecture for mobile terminals employing EER power amplifier

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.