Coherence Time Evaluation in Indoor Optical Wireless Communication Channels
The coherence time is the time over which the channel-gain-values correlation coefficient drops below a predefined threshold. The coherence time is typically used to quantify the pace of appreciable channel changes and is important, for example, for determining handoff and resource allocation time c...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/18/5067 |
| _version_ | 1797554449524195328 |
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| author | Dima Bykhovsky |
| author_facet | Dima Bykhovsky |
| author_sort | Dima Bykhovsky |
| collection | DOAJ |
| description | The coherence time is the time over which the channel-gain-values correlation coefficient drops below a predefined threshold. The coherence time is typically used to quantify the pace of appreciable channel changes and is important, for example, for determining handoff and resource allocation time constraints. The goal of this work is to experimentally measure the coherence time of indoor optical wireless communication (OWC) channels under various mobile scenarios. The amount of movement was quantified by mobile sensor measurements. The experiments show that it is reasonable to assume that the channel varies slowly for a time period of ~100 milliseconds for most mobile scenarios. |
| first_indexed | 2024-03-10T16:32:15Z |
| format | Article |
| id | doaj.art-cd155df90a35430b9fded45b6a2a2cc1 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T16:32:15Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-cd155df90a35430b9fded45b6a2a2cc12023-11-20T12:47:38ZengMDPI AGSensors1424-82202020-09-012018506710.3390/s20185067Coherence Time Evaluation in Indoor Optical Wireless Communication ChannelsDima Bykhovsky0Shamoon College of Engineering, Beer-Sheva 8410802, IsraelThe coherence time is the time over which the channel-gain-values correlation coefficient drops below a predefined threshold. The coherence time is typically used to quantify the pace of appreciable channel changes and is important, for example, for determining handoff and resource allocation time constraints. The goal of this work is to experimentally measure the coherence time of indoor optical wireless communication (OWC) channels under various mobile scenarios. The amount of movement was quantified by mobile sensor measurements. The experiments show that it is reasonable to assume that the channel varies slowly for a time period of ~100 milliseconds for most mobile scenarios.https://www.mdpi.com/1424-8220/20/18/5067optical wireless communicationcoherence timeoptical wireless channelautocovariance function (ACF)nine degrees of freedom (9DoF) |
| spellingShingle | Dima Bykhovsky Coherence Time Evaluation in Indoor Optical Wireless Communication Channels Sensors optical wireless communication coherence time optical wireless channel autocovariance function (ACF) nine degrees of freedom (9DoF) |
| title | Coherence Time Evaluation in Indoor Optical Wireless Communication Channels |
| title_full | Coherence Time Evaluation in Indoor Optical Wireless Communication Channels |
| title_fullStr | Coherence Time Evaluation in Indoor Optical Wireless Communication Channels |
| title_full_unstemmed | Coherence Time Evaluation in Indoor Optical Wireless Communication Channels |
| title_short | Coherence Time Evaluation in Indoor Optical Wireless Communication Channels |
| title_sort | coherence time evaluation in indoor optical wireless communication channels |
| topic | optical wireless communication coherence time optical wireless channel autocovariance function (ACF) nine degrees of freedom (9DoF) |
| url | https://www.mdpi.com/1424-8220/20/18/5067 |
| work_keys_str_mv | AT dimabykhovsky coherencetimeevaluationinindooropticalwirelesscommunicationchannels |