A Potential Transmitter Architecture for Future Generation Green Wireless Base Station

Vandana Bassoo, Kevin Tom, AK Mustafa, Ellie Cijvat, Henrik Sjoland, Mike Faulkner
2009 EURASIP Journal on Wireless Communications and Networking  
Current radio frequency power amplifiers in 3G base stations have very high power consumption leading to a hefty cost and negative environmental impact. In this paper, we propose a potential architecture design for future wireless base station. Issues associated with components of the architecture are investigated. The all-digital transmitter architecture uses a combination of envelope elimination and restoration (EER) and pulse width modulation (PWM)/pulse position modulation (PPM) modulation.
more » ... n (PPM) modulation. The performance of this architecture is predicted from the measured output power and efficiency curves of a GaN amplifier. 57% efficiency is obtained for an OFDM signal limited to 8 dB peak to average power ratio. The PWM/PPM drive signal is generated using the improved Cartesian sigma delta techniques. It is shown that an RF oversampling by a factor of four meets the WLAN spectral mask, and WCDMA specification is met by an RF oversampling of sixteen.
doi:10.1155/2009/821846 fatcat:qzketpf24nanlhqbkmt5tfsg4i