Adaptive filter theory
Multiuser Detection
Virtual radar imaging for sensor networks
Proceedings of the 3rd international symposium on Information processing in sensor networks
Geographic gossip: efficient aggregation for sensor networks
Proceedings of the 5th international conference on Information processing in sensor networks
Active wireless sensing for rapid information retrieval in sensor networks
Proceedings of the 5th international conference on Information processing in sensor networks
Matched source-channel communication for field estimation in wireless sensor networks
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
IEEE/ACM Transactions on Networking (TON) - Special issue on networking and information theory
Active Wireless Sensing in Multipath Environments
SSP '07 Proceedings of the 2007 IEEE/SP 14th Workshop on Statistical Signal Processing
Deconstructing multiantenna fading channels
IEEE Transactions on Signal Processing
Type-Based Decentralized Detection in Wireless Sensor Networks
IEEE Transactions on Signal Processing
Decentralized Inference Over Multiple-Access Channels
IEEE Transactions on Signal Processing - Part I
Type based estimation over multiaccess channels
IEEE Transactions on Signal Processing
Towards an information theory of large networks: an achievable rate region
IEEE Transactions on Information Theory
IEEE Communications Magazine
Estimating inhomogeneous fields using wireless sensor networks
IEEE Journal on Selected Areas in Communications
Distributed classification of Gaussian space-time sources in wireless sensor networks
IEEE Journal on Selected Areas in Communications
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
Power, spatio-temporal bandwidth, and distortion in large sensor networks
IEEE Journal on Selected Areas in Communications
Computing and communicating functions over sensor networks
IEEE Journal on Selected Areas in Communications
Information discovery in mission-critical wireless sensor networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
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Many existing information processing schemes in sensor networks are based on multihop in-network algorithms that require information routing and coordination between nodes and incur excess overhead in latency and energy consumption. In this paper, we develop an alternative and complementary single-hop approach--active wireless sensing (AWS)--in which a wireless information retriever (WIR) queries a select ensemble of nodes to obtain desired information in a rapid and energy-efficient manner. The basic architecture in AWS consists of: i) a WIR, equipped with an antenna array, interrogates the wireless sensors with wideband space-time waveforms, ii) the sensors modulate the acquired waveforms with their (possibly encoded) measured data and generate an ensemble response to the WIR's interrogation signal, and iii) the WIR extracts the sensor data by exploiting the space-time characteristics of the resulting multipath sensing channel. To facilitate analysis, we propose a canonical family of sensing configurations that represent a simple abstraction of spatial correlation in the signal field or the nature of local cooperation in the network. The concept of source-channel matching is introduced in which the spatio-temporal resolution is adapted to the spatial scale of node correlation in the sensing configurations. Signaling strategies and associated receiver structures at the WIR are developed for different source-channel matching configutations. The performance of AWS is analyzed in different configurations both in terms of reliability and capacity of information retrieval.