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| MVDR Based Smart Antenna MAC for MANETs | |||
| Koskela,Timo | Centre for Wireless Communications | ||
| Raustia,Matti | Centre for Wireless Communications | ||
| Bräysy,Timo | Centre for Wireless Communications | ||
| Capacity and interference suppression capabilities of mobile Ad Hoc networks (MANETs) can be greatly enhanced when directional antennas are used. The capacity gain is achieved because of the spatial reuse which enables more simultaneous connections even when the communicating nodes are near each other. If directional antennas are conventional, the directioning speed is limited by mechanical properties of the antenna turning system. Adaptive antennas (which are some times called also smart antennas) offer a great advantage because their radiation patterns can be altered very quickly and they offer very efficient ways to suppress the intentional jamming, too. The use of directional antennas presents a severe hidden node problem if no special methods in MAC layer are used. We present MAC method which can take advantage of the adaptive antenna system, needs no dedicated control channel and can suppress network self-interference and intentional jamming. Work which is presented is continuation to previously presented Bi-Code Channel Access (BCCA) MAC method. | |||
| Timo Koskela is an M.Sc. student in the Department of Electrical Engineering at the University of Oulu. He is a research assistant in Centre for Wireless Communications. Topic of his Master's thesis and his research area is adaptive antennas in ad hoc networks. | |||