Improving phaseless DoA estimation in multipath-impaired scenarios by exploiting dual-band operations

Cidronali, Alessandro; Collodi, Giovanni; Maddio, Stefano; Passafiume, Marco; Pelosi, Giuseppe; Selleri, Stefano

doi:10.1109/mwsym.2016.7540326

Cited by 19 publications

(15 citation statements)

References 12 publications

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“…DoA estimation is achieved applying a Maximum-Likelihood algorithm between the vector of observed RSSI values S and each vector defined within a "reference map" M [3]. The steering vector S is defined as…”

Section: Description Of the Systemmentioning

confidence: 99%

“…Note that fig.2 shows pure angular pattern definition without dealing with different frequency propagation properties. Considering standard Friis propagation model [3] effective incident power to overall SBA equals to…”

Section: Description Of the Systemmentioning

confidence: 99%

“…More conservative approaches for a home environment have been investigated, based only on a single smart node capable to monitor an entire area. Recently, the capability of 802.11n PHY link operating on both 2.45GHz and 5.2GHz bands has been exploited to improve DoA localization accuracy even in presence of strong multipath impairment [3].…”

Section: Introductionmentioning

confidence: 99%

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An enhanced algorithm for 2D indoor localization on single anchor RSSI-based positioning systems

Passafiume

Maddio

Collodi

et al. 2017

2017 European Radar Conference (EURAD)

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In this paper a cost-effective RSSI-based Range and Direction of Arrival (DoA) estimator using a single anchor node is proposed. Exploiting the Space Division Multiple Access enabled by a anchor node equipped with a switched beam frontend, the DoA of a nomadic node is estimated on the basis of maximum likelyhood approach driven by the expected power distribution. The distance is subsequently estimated on the basis of a robust inversion of the power-range relationship. Compared to conventional estimators, the proposed approach offers a precise DoA estimation as well as a adequate range estimation despite the simple implementation. The combination of the two information enables also the estimation of the absolute position with a very low-cost solution, suitable for Wireless Sensor Networks and for 802.11n/ac IEEE compliant networks. Experimental validations in an anechoic chamber confirm that the proposed method can provide a complete 2D localization with a mean error of 95cm and a sub-metric localization area coverage of about 60% within a typical home room area size (28m 2), without the needing of a multi-anchor system setup.

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Section: Description Of the Systemmentioning

confidence: 99%

Section: Description Of the Systemmentioning

confidence: 99%

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An enhanced algorithm for 2D indoor localization on single anchor RSSI-based positioning systems

Passafiume

Maddio

Collodi

et al. 2017

2017 European Radar Conference (EURAD)

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“…The disc radius is R, while the ellipse axes are A and B. The central hole operates as a modal degeneration driver, perturbing the fundamental mode, TM 11 . In unperturbed conditions, the resonant frequencies of the modes of a disc patch are dictated by the dimension R as well as by the dielectric characteristic of the substrate [20].…”

Section: Basic Designmentioning

confidence: 99%

“…In addition, dual band operation is a solid advantage for positioning technology, as testified in [11], where a dual band radio operating in 2.45 and 5.7 GHz is successfully employed in indoor scenarios to improve the Direction of Arrival estimation accuracy. Usually when applied to this class of positioning system a set of N antenna elements is typically arranged in a regular architecture, to form a Switched Beam Antenna (SBA), which is the key component for space division multiple access (SDMA) technology [7,12].…”

Section: Introductionmentioning

confidence: 99%

A Circularly Polarized Antenna for Dual Band Operation at 2.45 GHZ and 5.10 GHZ

Maddio¹,

Pelosi²,

Righini³

et al. 2017

PIER C

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Abstract-This paper describes the design and experimental characterization of a circular polarized printed antenna for dual-band WiFi operation at 2.45 GHz and 5.10 GHz. The patch design is based on a combination of slits loading and gap-coupling applied to a disc patch in order to enhance the radiation performances in terms of polarization purity and bandwidth at the two operation frequencies. Experimental validations confirm a maximum gain around 6.0 dB for both 2.45and 5.10 GHz, as well as an axial ratio as low as 0.5 dB and a return loss exceeding 15 dB on the operating frequencies. These characteristics are suitable for operationing in IEEE802.11x networks.

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