Turn Back the Clock: Time Reversal for Green Radio Communications
Résumé
In this article, time reversal (TR) signal processing techniques are studied and evaluated over novel realistic green use cases. The principles of TR are first explained and practical use cases for green communications are designed considering long-term evolution-advanced coordinated multipoint (LTE-A CoMP) transmission/reception, fast session transfer (FST) extensions, and multiradio access technology (multi-RAT) architectures foreseen as promising green networks. Related to the FST use case, a propagation analysis of mixed indoor and outdoor channels is carried out, and dedicated TR use cases are defined to identify the limitations and advantages of TR in a green radio context: frequency selectivity and bandwidth size influence, number of antennas, Doppler effect impact, antenna mismatch alignment, and synchronization problems. Such use cases are used to provide guidelines concerning the use of TR techniques. Some performance statistics are then given to stress the advantages of TR in a green radio communications context.
Mots clés
radiowave propagation
synchronisation
wireless channels
Doppler effect
FST extensions
LTE-A CoMP transmission-reception
TR signal processing techniques
antenna mismatch alignment
fast session transfer extensions
green radio communications
long-term evolution-advanced coordinated multipoint transmission-reception
mixed indoor channel propagation analysis
mixed outdoor channel propagation analysis
multiRAT architectures
multiradio access technology architectures
synchronization problems
time reversal signal processing techniques
Bandwidth
Delays
Green products
Interference
Radio communication
Signal processing
Switches
Long Term Evolution
indoor radio