Mobile Networks and Applications - Special issue on channel access in wireless networks
Physical layer driven protocol and algorithm design for energy-efficient wireless sensor networks
Proceedings of the 7th annual international conference on Mobile computing and networking
Multiuser Detection
ALOHA packet system with and without slots and capture
ACM SIGCOMM Computer Communication Review
Traffic modeling and tracking for multiuser detection for random access networks
ICASSP '00 Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 05
Sensor networks with mobile agents
MILCOM'03 Proceedings of the 2003 IEEE conference on Military communications - Volume I
Design challenges for energy-constrained ad hoc wireless networks
IEEE Wireless Communications
Energy concerns in wireless networks
IEEE Wireless Communications
Energy-constrained modulation optimization
IEEE Transactions on Wireless Communications
Linear multiuser receivers in random environments
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
Opportunistic beamforming using dumb antennas
IEEE Transactions on Information Theory
Multiple-antenna channel hardening and its implications for rate feedback and scheduling
IEEE Transactions on Information Theory
Exploiting decentralized channel state information for random access
IEEE Transactions on Information Theory
On the power efficiency of sensory and ad hoc wireless networks
IEEE Transactions on Information Theory
IEEE Communications Magazine
Opportunistic transmission scheduling with resource-sharing constraints in wireless networks
IEEE Journal on Selected Areas in Communications
Energy-efficiency of MIMO and cooperative MIMO techniques in sensor networks
IEEE Journal on Selected Areas in Communications
A high throughput load balance algorithm for multichannel wireless sensor networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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We investigate two important aspects in sensor network design--the throughput and the energy efficiency. We consider the uplink reachback problem where the receiver is equipped with multiple antennas and linear multiuser detectors. We first assume Rayleigh flat-fading, and analyze two MAC schemes: round-robin and slotted-ALOHA. We optimize the average number of transmissions per slot and the transmission power for two purposes: maximizing the throughput, or minimizing the effective energy (defined as the average energy consumption per successfully received packet) subject to a throughput constraint. For each MAC scheme with a given linear detector, we derive the maximum asymptotic throughput as the signal-to-noise ratio goes to infinity. It is shown that the minimum effective energy grows rapidly as the throughput constraint approaches the maximum asymptotic throughput. By comparing the optimal performance of different MAC schemes equipped with different detectors, we draw important tradeoffs involved in the sensor network design. Finally, we show that multiuser scheduling greatly enhances system performance in a shadow fading environment.