Title :
Transmission techniques for increased power efficiency in OFDM-based wireless communication systems
Author :
Dinis, Rui ; Gusmao, Antonio
Author_Institution :
CAPS, Inst. Superior Tecnico, Lisbon, Portugal
Abstract :
Due to their robustness against the time-dispersive effects of multipath propagation, OFDM schemes are widely considered for high rate transmission in digital wireless systems. This paper deals with power efficiency issues in OFDM-based broadband wireless systems for the MM-wave band. We consider grossly nonlinear power amplifiers only, within conventional and two-branch transmitter structures; channel coding and interleaving in the frequency domain; a space-diversity, maximal-ratio combining scheme, and, as an alternative to conventional ARQ, similar time-diversity, packet combining schemes. A set of simulation results is presented and discussed
Keywords :
OFDM modulation; broadband networks; channel coding; digital radio; dispersive channels; diversity reception; indoor radio; millimetre wave power amplifiers; multipath channels; radio transmitters; MM-wave band; OFDM-based wireless communication systems; QoS; channel coding; channel interleaving; digital wireless systems; frequency domain; high rate transmission; indoor systems; maximal-ratio combining; multipath propagation; nonlinear power amplifiers; packet combining; power efficiency; simulation results; space-diversity; time-dispersive effects; time-diversity; transmission techniques; two-branch transmitter structures; Automatic repeat request; Broadband amplifiers; Channel coding; Diversity reception; Frequency domain analysis; Interleaved codes; OFDM; Power amplifiers; Robustness; Transmitters;
Conference_Titel :
Radio and Wireless Conference, 1998. RAWCON 98. 1998 IEEE
Conference_Location :
Colorado Springs, CO
Print_ISBN :
0-7803-4988-1
DOI :
10.1109/RAWCON.1998.709125
