Analysis and Performance of a Smart Antenna for 2.45-GHz Single-Anchor Indoor Positioning

Cidronali, Alessandro; Maddio, Stefano; Giorgetti, Gianni; Manes, G.

doi:10.1109/tmtt.2009.2035947

Cited by 84 publications

(46 citation statements)

References 18 publications

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“…A Switched beam antennas consists of an antenna array fed by a beamforming network and it is capable of a predetermined set of beams which can be selected with an appropriate digital control [6]. This technology is complementary of the adaptive beamformer, which is an antenna array combined with a phase-shifting device, able to adaptively generate the required radiation pattern pointing in arbitrary direction.…”

Section: Switched Beam Antennasmentioning

confidence: 99%

“…CP radiation is achieved when these two modes, which are orthogonal, combine in phase quadrature with the same magnitude. This type of antenna has been already successfully employed in localization application [5,6].…”

Section: Elementary Antennamentioning

confidence: 99%

“…[6,13]. The Direction of Arrival -which in this case can be more properly defined as the Sector of Arrival -is identified with the antenna domain of the strongest beam, where the n-th antenna domain is defined as the angular range where the n-th antenna gain is higher than the other antennas:…”

Section: Strongest Beammentioning

confidence: 99%

See 2 more Smart Citations

RSSI/DoA Based Positioning Systems for Wireless Sensor Network

Maddio¹,

Cidronali²,

Manes³

2012

New Approach of Indoor and Outdoor Localization Systems

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Section: Switched Beam Antennasmentioning

confidence: 99%

Section: Elementary Antennamentioning

confidence: 99%

See 1 more Smart Citation

RSSI/DoA Based Positioning Systems for Wireless Sensor Network

Maddio¹,

Cidronali²,

Manes³

2012

New Approach of Indoor and Outdoor Localization Systems

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“…3, is based on the design reported in [16], with the additional improvements investigated in [11], [17].…”

Section: Architecture Of the Systemmentioning

confidence: 99%

A distributed positioning system based on real-time RSSI enabling decimetric precision in unmodified IEEE 802.11 networks

Maddio

Passafiume

Cidronali

et al. 2015

2015 IEEE MTT-S International Microwave Symposium

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Abstract-In this paper we present a distributed positioning system for indoor environments based on a network of compact independent anchor nodes operating as specialized WiFi access points. Each node is built with component-off-the-shelves and it is capable of standard IEEE 802.11 connectivity at 2.45 GHz. The enabling technology for the localization is the Switched Beam Antenna (SBA) equipped in each node, which permits a space division multiple access at network-level.The positional information is the result of a maximum likeli hood estimation driven by the expected signal space partition of the constellation, and it is tolerant to noisy power measurements, such as Received Signal Strength Indicator, thanks to angular filtering capability of the SBA, which in addition operates in circular polarization.Experimental validations demonstrate the performance of a 3-anchors network, operating within the IEEE 802.11 protocol, monitoring a single nomadic node inside a 7 m 2 indoor square area. It results that 68% of the square area is covered with a localization error below 50 cm, with a mean error of 47 cm.Inside the triangular mesh defined by the three anchors, the mean error drops to 39cm, with 88% of the area being below 50 cm. In addition, the maximum error is always below 77 cm.Index Terms-Indoor positioning system, Received Signal Strength Indicator (RSSI), Switched beam antenna.

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“…The Antenna design is based on the modal degeneration phenomenon, a smart way to achieve and control the CP effect without the aid of an external splitter. Following this approach, compact directive antenna design is possible [12,13]. Figure 5.…”

Section: Antenna Designmentioning

confidence: 99%