Type-Based Random Access for Distributed Detection Over Multiaccess Fading Channels
- Creators
- Anandkumar, Animashree
- Tong, Lang
Abstract
The problem of distributed detection in a sensor network over multiaccess fading channels is considered. A random-access transmission scheme referred to as the type-based random access (TBRA) is proposed and analyzed. Error exponents of TBRA under noncoherent detection are characterized with respect to the mean transmission rate and the channel-coherence index. For the zero-mean multiaccess fading channels, it is shown that there exists an optimal mean-transmission rate that maximizes the detection-error exponents. The optimal mean-transmission rate can be calculated numerically or estimated using the Gaussian approximation, and it gives a sensor-activation strategy that achieves an optimal allocation of transmission energy to spatial and temporal domains. Numerical examples and simulations are used to compare TBRA with the conventional centralized time-division multiple access (TDMA) scheme. It is shown that for the zero-mean multiaccess fading channels, TBRA gives substantial improvement in the low signal-to-noise ratio (SNR) regime whereas for the nonzero mean fading channels, TBRA performs better over a wide range of SNR.
Additional Information
© 2007 IEEE. Manuscript received December 24, 2005; revised December 28, 2006. This work was supported in part through the collaborative participation in the Communications and Networks Consortium sponsored by the U. S. Army Research Laboratory under the Collaborative Technology Alliance Program, Cooperative Agreement DAAD19-01-2-0011 and by the Army Research Office under Grant ARO-W911NF-06-1-0346. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Jaume Riba.Attached Files
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Additional details
- Eprint ID
- 81648
- Resolver ID
- CaltechAUTHORS:20170920-153723886
- DAAD19-01-2-0011
- Army Research Laboratory (ARL)
- W911NF-06-1-0346
- Army Research Office (ARO)
- Created
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2017-09-20Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field