UWB 2D communication tiles

Shinoda, Hiroyuki; Okada, Akimasa; Noda, Akihito

doi:10.1109/icuwb.2014.6959006

Cited by 9 publications

(4 citation statements)

References 4 publications

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“…In the UWB 2DC tile, multipath signals are generated [5]. However, that influence is negligible since the signal storage duration in a tile is just several nanoseconds which is corresponding to a few times reflections in a tile.…”

Section: B Resultsmentioning

confidence: 99%

“…oor 2DC implementation, we proposed "UWB 2DC tile" in [5] as shown in Fig.1. The tile is a 50 cm square which is the standard size of a carpet tile and consists of three layers: a surface layer, a 2DC sheet, and a base layer.…”

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confidence: 99%

“…Therefore it is necessary to keep connection between the coupler and the sheet even with a surface layer supposed to be several-milimeters thick. In previous researches, the surface insulators on the 2DC sheet were evaluated with some foaming materials and a part of carpet material in [5] and [6].…”

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confidence: 99%

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Feasibility study on OFDM signal transmission with UWB 2D communication tile

Okada

Noda

Shinoda

2014

2014 IEEE/SICE International Symposium on System Integration

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The concept of UWB 2DC tile as a practical implementation of UWB 2DC was proposed in the previous research. In this paper, we evaluate the feasibility of OFDM signal transmission through a two-dimensional communication (2DC) sheet in the high-band of ultra-wide band (UWB). First, we examine the effect of a thick surface insulator put on the sheet that weakens the connection between the 2DC sheet and the device on the surface insulator. Experiments are conducted to clarify the physical property of the connection. Second, we examine signal transmission via the 2DC sheet with a pair of UWB communication devices. Based on the both experimental results, we ensure that OFDM UWB 2DC is feasible with a practical carpet material on the sheet.

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Section: B Resultsmentioning

confidence: 99%

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confidence: 99%

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Feasibility study on OFDM signal transmission with UWB 2D communication tile

Okada

Noda

Shinoda

2014

2014 IEEE/SICE International Symposium on System Integration

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“…The isolation property is important to enable the stable tile-system communication even under frequency overlapping with the over-the-air communication. In our previous works [12][15] [16], we ensured the connection between the tile and the coupler. However the feasibility of the coexistence with radio signals in the air has not been yet ensured.…”

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confidence: 99%

Evaluation of isolation property of UWB 2DC tile for coexistence with radio signals

Okada

Noda

Shinoda

2015

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

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In this paper, we evaluate isolation property of an ultra-wide band (UWB) two-dimensional communication (2DC) tile. The UWB 2DC tile is based on 2DC technology and enables a room-size and high-speed network. In 2DC, radio waves are confined in a sheet-like waveguide. An evanescent field is generated above the waveguide and used to establish the connection between the devices with a dedicated coupler. Energy radiated from the waveguide is so small that coexistence between signals in the tile and in the air with little interference in the same room is possible. To evaluate the interference between an over- the-air communication path and an on-tile communication path, the transmittance between an antenna in the air and a feeding coupler on the tile is measured with a vector network analyzer. The measurement is conducted with two typical boundary conditions of the waveguide: a short boundary and an open boundary. The experimental results show that the transmittance is about60 dB or less at 600 mm above the tile in each boundary. This value is lower than that of free-space propagation. Therefore, the UWB 2DC tile system can keep the stable and high-speed network even if the same frequency band is shared with in-air UWB communication.

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