On the Effectiveness of Multiple Antennas in Distributed Detection over Fading MACs
- 16 March 2012
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Wireless Communications
- Vol. 11 (5), 1744-1752
- https://doi.org/10.1109/twc.2012.031212.110814
Abstract
A distributed detection problem over fading Gaussian multiple-access channels is considered. Sensors observe a phenomenon and transmit their observations to a fusion center using the amplify and forward scheme. The fusion center has multiple antennas with different channel models considered between the sensors and the fusion center, and different cases of channel state information are assumed at the sensors. The performance is evaluated in terms of the error exponent for each of these cases, where the effect of multiple antennas at the fusion center is studied. When there is channel information at the sensors, the gain in error exponent due to having multiple antennas at the fusion center is shown to be limited to a factor of 8/π for Rayleigh fading channels between the sensors and the fusion center, and independent of the number of antennas at the fusion center. Simple practical schemes and numerical methods using semidefinite relaxation techniques are presented that utilize the limited possible gains available. Simulations are used to establish the accuracy of the results.Keywords
This publication has 22 references indexed in Scilit:
- Design of Distributed Detection Schemes for Multiaccess ChannelsIEEE Transactions on Aerospace and Electronic Systems, 2012
- Semidefinite Relaxation of Quadratic Optimization ProblemsIEEE Signal Processing Magazine, 2010
- Distributed GABBA space-time codes in amplify-and-forward relay networksIEEE Transactions on Wireless Communications, 2009
- PAC vs. MAC for Decentralized Detection Using Noncoherent ModulationIEEE Transactions on Signal Processing, 2009
- Optimal Power Scheduling for Correlated Data Fusion in Wireless Sensor Networks via Constrained PSOIEEE Transactions on Wireless Communications, 2008
- Optimal Power Allocation for Distributed Detection Over MIMO Channels in Wireless Sensor NetworksIEEE Transactions on Signal Processing, 2008
- Nonorthogonal Transmission and Noncoherent Fusion of Censored DecisionsIEEE Transactions on Vehicular Technology, 2008
- Type-Based Decentralized Detection in Wireless Sensor NetworksIEEE Transactions on Signal Processing, 2007
- Distributed detection for cellular CDMAElectronics Letters, 1996
- On deflection as a performance criterion in detectionIEEE Transactions on Aerospace and Electronic Systems, 1995