Joint directions finding and material typecasting through IR-UWB communications

Tosa, V. La; Denis, B.; Tchoffo-Talom, F.; Uguen, Bernard

doi:10.1109/pimrc.2008.4699653

Cited by 2 publications

(6 citation statements)

References 11 publications

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“…The previous work [8] gave a statistical model for an expected incident angle in a square room, assuming transmitter and receiver coordinates as uniform random variables. Nevertheless, in a rectangular room scenario, incident angles on the largest edges of the room (i.e.…”

Section: A Joint Probability Density Functionmentioning

confidence: 99%

“…Previous works [8] and [9] used a uniform partitioning of angular variables to be estimated (i.e. AoAs and AoDs).…”

Section: B Clusteringmentioning

confidence: 99%

“…Therefore, an approach involving joint IAIS probability is expected to slightly compensate for a degradation of the recognition capability provided by algorithms only based on cross-correlation (e.g. [8]) in noised multipath scenarios. In order to improve paths detection, resolved paths are deleted progressively out of the received signal.…”

Section: Proposed Estimation Approachmentioning

confidence: 99%

“…The work [8] presented a simple algorithm which jointly estimates the Direction of Arrival (DoA), Direction of Departure (DoD) and material typecasting for temporally wellisolated UWB pulses issued from a simple reflection on a slab, assuming a square room geometry. Previously, an even simpler algorithm was employed in [9] in order to jointly estimate the DoA and the DoD for temporally well-isolated UWB pulses making the assumption of a free-space propagation.…”

Section: Introductionmentioning

confidence: 99%

“…The work presented in this paper gets rid of some assumptions of [8] (e.g. temporal path isolation, square room geometry) and proposes a new iterative algorithm integrating the multipath nature of indoor IR-UWB communications from a novel statistical point of view.…”

Section: Introductionmentioning

confidence: 99%

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A Preliminary Investigation on Angular Parameters Estimation in a Simplified IR-UWB Indoor Multipath Scenario

Tosa

Denis

Uguen

2009

2009 IEEE Wireless Communications and Networking Conference

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This paper presents an algorithm that interprets the waveforms associated with received mutipath components in order to estimate their Direction of Arrival (DoA), Direction of Departure (DoD) and Incident Angle to the Indoor Surface (IAIS) in the context of Impulse Radio -Ultra Wide Band (IR-UWB) communications. The proposed solution combines a deterministic description of the filtering effects of antennas and materials with a simple statistical model for IAIS. Iteratively, a set of jointly estimated path parameters is chosen according to the crosscorrelation values obtained with currently resolved paths and predicted waveforms. Following an estimation tree approach, impossible sets are progressively discarded. An Estimation Quality Indicator is defined, in order to handle aberrant configurations made up of five single-bounce estimated paths. We show here that the IR-UWB transmission technology, which benefits from fine resolution capabilities, looks particularly suitable to the discussed algorithm. Assuming known walls material, simulation results are provided to illustrate the performance of such a technique in a simplified peer-to-peer multipath scenario. The proposed solution discloses new perspectives for context-awareness through classical communication links.

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Section: A Joint Probability Density Functionmentioning

confidence: 99%

“…Previous works [8] and [9] used a uniform partitioning of angular variables to be estimated (i.e. AoAs and AoDs).…”

Section: B Clusteringmentioning

confidence: 99%

Section: Proposed Estimation Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Preliminary Investigation on Angular Parameters Estimation in a Simplified IR-UWB Indoor Multipath Scenario

Tosa

Denis

Uguen

2009

2009 IEEE Wireless Communications and Networking Conference

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Impact of antennas on the anchor-less indoor localization of a static IR-UWB pair

Tosa

Denis

Bories

et al. 2010

21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

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This paper investigates the impact of realistic antennas on joint anchor-less localization and indoor characterization based on Impulse Radio (IR) Ultra Wideband (UWB) communications. In this frame, the Maximum Averaged Likelihood (MAL) algorithm and its extended version are considered, both relying on a tree approach consisting in two stages. The first part of the process exploits the cross-correlation between received and locally predicted paths and it is the same for both algorithms. The second stage calculates the averaged likelihood of measured path parameters obtained in the previous step, but different measurements are used for MAL and extended MAL (eMAL), as in the first case only the Angle of Incidence (AoI) and the Time of Arrival (ToA) are considered. Additionally, the eMAL tree algorithm also accounts for two couples of Angles of Departure (AoDs) and Angles of Arrival (AoAs). The estimation errors of both nodes coordinates and room dimension obtained with the two algorithms are compared for three realistic UWB antennas. Finally, the remaining algorithm-independent ambiguities (i.e. resulting from scenario and geometry) are discussed.

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Joint directions finding and material typecasting through IR-UWB communications

Cited by 2 publications

References 11 publications

A Preliminary Investigation on Angular Parameters Estimation in a Simplified IR-UWB Indoor Multipath Scenario

A Preliminary Investigation on Angular Parameters Estimation in a Simplified IR-UWB Indoor Multipath Scenario

Impact of antennas on the anchor-less indoor localization of a static IR-UWB pair

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