Advancing wireless link signatures for location distinction

Zhang, Junxing; Firooz, Mohammad Hamed; Patwari, Neal; Kasera, Sneha Kumar

doi:10.1145/1409944.1409949

Cited by 105 publications

(70 citation statements)

References 14 publications

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“…• Despite that phase information enriches the feature space, it needs careful calibration to mitigate dramatic drifts due to external noise [21]. The amplitude of CFR, in contrast, remains sensitive to human activities in the vicinity, yet pertains the spectral structures in case of external perturbation.…”

Section: Modeling Cfr Amplitude Featuresmentioning

confidence: 99%

Towards omnidirectional passive human detection

Zhou

Yang

et al. 2013

2013 Proceedings IEEE INFOCOM

104

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Abstract-Passive human detection and localization serve as key enablers for various pervasive applications such as smart space, human-computer interaction and asset security. The primary concern in devising scenario-tailored detecting systems is the coverage of their monitoring units. In conventional radiobased schemes, the basic unit tends to demonstrate a directional coverage, even if the underlying devices are all equipped with omnidirectional antennas. Such an inconsistency stems from the link-centric architecture, creating an anisotropic wireless propagating environment. To achieve an omnidirectional coverage while retaining the link-centric architecture, we propose the concept of Omnidirectional Passive Human Detection, and investigate to harness the PHY layer features to virtually tune the shape of the unit coverage by fingerprinting approaches, which is previously prohibited with mere MAC layer RSSI. We design the scheme with ubiquitously deployed WiFi infrastructure and evaluate it in typical multipath-rich indoor scenarios. Experimental results show that our scheme achieves an average false positive of 8% and an average false negative of 7% in detecting human presence in 4 directions.

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Section: Modeling Cfr Amplitude Featuresmentioning

confidence: 99%

Towards omnidirectional passive human detection

Zhou

Yang

et al. 2013

2013 Proceedings IEEE INFOCOM

104

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“…The history H can be polluted by the wrong distinction results through updating. Since distinction errors are sporadic while temporal fading changes are consistent [2], continuously updating history is still advantageous. In addition, we also prevent serious error propagation by periodically flushing the history H with new training mappings.…”

Section: A Algorithmic Frameworkmentioning

confidence: 99%

“…Given that the multipath characteristics of the link vary considerably at different locations several wavelengths away from each other, their measurements are a good "signature" of the link. This link signatures is formally defined as [1], [2], [10], [11]: h…”

Section: Measurement Typesmentioning

confidence: 99%

“…Unlike location estimation, perimeter distinction does not attempt to determine the exact location of a transmitter, instead, it only attempts to find out to which perimeter a transmitter belongs. Recently, researchers have developed methods for location distinction to tell the locations of two wireless transmitters apart [1], [2]. However unlike location distinction, perimeter distinction distinguishes different locations across perimeters instead of any location spots.…”

Section: Introductionmentioning

confidence: 99%

“…Since PHY-layer wireless measurements are products of the fading condition, these can be used for perimeter distinction. We examine the use of two types of wireless measurements for perimeter distinction -one based on the received signal strength (RSS), and another based on the channel impulse response, called wireless link signature (WLS) in the current literature [2]. We also adopt four classification algorithms from statistical learning to classify perimeters.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Distinguishing locations across perimeters using wireless link measurements

Zhang

Kasera

Patwari

et al. 2011

2011 Proceedings IEEE INFOCOM

Self Cite

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Abstract-Perimeter distinction in a wireless network is the ability to distinguish locations belonging to different perimeters. It is complementary to existing localization techniques. A drawback of the localization method is that when a transmitter is at the edge of an area, an algorithm with isotropic error will estimate its location in the wrong area at least half of the time. In contrast, perimeter distinction classifies the location as being in one area or the adjacent regardless of the transmitter position within the area. In this paper, we use the naturally different wireless fading conditions to accurately distinguish locations across perimeters. We examine the use of two types of wireless measurements: received signal strength (RSS) and wireless link signature (WLS), and propose multiple methods to retain good distinction rates even when the receiver faces power manipulation by malicious transmitters. Using extensive measurements of indoor and outdoor perimeters, we find that WLS outperforms RSS in various fading conditions. Even without using signal power WLS can achieve accurate perimeter distinction up to 80%. When we train our perimeter distinction method with multiple measurements within the same perimeter, we show that we are able to improve the accuracy of perimeter distinction, up to 98%.

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Dynamic spectrum access‐based cryptosystem for cognitive radio networks

Zou

Chigan

2016

Security Comm Networks

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The dynamic spectrum access (DSA) paradigm of the cognitive radio (CR) contributes intrinsic security capability to the CR network by hiding information in the unpredictable spectrum access patterns. This paper formalizes the frequency hopping DSA (FH-DSA)-based cryptography by introducing the model of dynamic bit (dybit), whose state indicates both the binary value and the DSA strategy. Taking advantage of uncertainty of the dybit state, FH-based key distribution (FH-KE) mechanisms are proposed to establish secrets among communication attendants. Based on the group FH-KE (GKE), a confidentiality-oriented DSA scheme, GKE-DSA is developed to realize the FH-DSA cryptography-based secure data communication. The GKE-DSA can conceal the DSA strategy of each communication link from others while limiting the data packet collisions through GKE-based negotiation.

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Advancing wireless link signatures for location distinction

Cited by 105 publications

References 14 publications

Towards omnidirectional passive human detection

Towards omnidirectional passive human detection

Distinguishing locations across perimeters using wireless link measurements

Dynamic spectrum access‐based cryptosystem for cognitive radio networks

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