ToA Ranging and Layer Thickness Computation in Nonhomogeneous Media
This paper introduces a novel and effective ranging approach in nonhomogeneous (NH) media consisting of frequency dispersive submedia via time-of-arrival (ToA). Here, the NH environment consists of sublayers with a specific thickness that is estimated throughout the ranging process. First, a novel t...
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| Veröffentlicht in: | IEEE transactions on geoscience and remote sensing 2017-02, Vol.55 (2), p.742-752 |
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| container_title | IEEE transactions on geoscience and remote sensing |
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| creator | Jamalabdollahi, Mohsen Zekavat, Seyed |
| description | This paper introduces a novel and effective ranging approach in nonhomogeneous (NH) media consisting of frequency dispersive submedia via time-of-arrival (ToA). Here, the NH environment consists of sublayers with a specific thickness that is estimated throughout the ranging process. First, a novel technique for ToA estimation in the presence of frequency dispersive submedia via orthogonal frequency division multiple access subcarriers is proposed. In the proposed technique, preallocated orthogonal subcarriers are utilized to construct a ranging waveform that enables high-performance ToA estimation in dispersive NH media in the frequency domain. The proposed ToA technique is exploited for multiple ToA measurements at different carrier frequencies, which leads to a system of linear equations that can be solved to compute the thickness of the available submedia and calculate the range. Simulation results for underwater-airborne media and underground channel confirm that the proposed technique offers high-resolution ranging at different signal to noise ratio regimes in the NH media. |
| doi_str_mv | 10.1109/TGRS.2016.2614263 |
| format | Article |
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Here, the NH environment consists of sublayers with a specific thickness that is estimated throughout the ranging process. First, a novel technique for ToA estimation in the presence of frequency dispersive submedia via orthogonal frequency division multiple access subcarriers is proposed. In the proposed technique, preallocated orthogonal subcarriers are utilized to construct a ranging waveform that enables high-performance ToA estimation in dispersive NH media in the frequency domain. The proposed ToA technique is exploited for multiple ToA measurements at different carrier frequencies, which leads to a system of linear equations that can be solved to compute the thickness of the available submedia and calculate the range. Simulation results for underwater-airborne media and underground channel confirm that the proposed technique offers high-resolution ranging at different signal to noise ratio regimes in the NH media.</description><identifier>ISSN: 0196-2892</identifier><identifier>EISSN: 1558-0644</identifier><identifier>DOI: 10.1109/TGRS.2016.2614263</identifier><identifier>CODEN: IGRSD2</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Angle-of-arrival ; Carrier frequencies ; Computation ; Computer simulation ; Delays ; Dispersion ; Distance measurement ; frequency dispersion ; Frequency division multiple access ; Frequency-domain analysis ; Inhomogeneous media ; Linear equations ; Media ; nonhomogeneous (NH) media ; OFDM ; orthogonal frequency division multiple access (OFDMA) ; ranging ; relative permittivity ; Signal to noise ratio ; Subcarriers ; Thickness ; Time of arrival estimation ; time-of-arrival (ToA)</subject><ispartof>IEEE transactions on geoscience and remote sensing, 2017-02, Vol.55 (2), p.742-752</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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Here, the NH environment consists of sublayers with a specific thickness that is estimated throughout the ranging process. First, a novel technique for ToA estimation in the presence of frequency dispersive submedia via orthogonal frequency division multiple access subcarriers is proposed. In the proposed technique, preallocated orthogonal subcarriers are utilized to construct a ranging waveform that enables high-performance ToA estimation in dispersive NH media in the frequency domain. The proposed ToA technique is exploited for multiple ToA measurements at different carrier frequencies, which leads to a system of linear equations that can be solved to compute the thickness of the available submedia and calculate the range. Simulation results for underwater-airborne media and underground channel confirm that the proposed technique offers high-resolution ranging at different signal to noise ratio regimes in the NH media.</description><subject>Angle-of-arrival</subject><subject>Carrier frequencies</subject><subject>Computation</subject><subject>Computer simulation</subject><subject>Delays</subject><subject>Dispersion</subject><subject>Distance measurement</subject><subject>frequency dispersion</subject><subject>Frequency division multiple access</subject><subject>Frequency-domain analysis</subject><subject>Inhomogeneous media</subject><subject>Linear equations</subject><subject>Media</subject><subject>nonhomogeneous (NH) media</subject><subject>OFDM</subject><subject>orthogonal frequency division multiple access (OFDMA)</subject><subject>ranging</subject><subject>relative permittivity</subject><subject>Signal to noise ratio</subject><subject>Subcarriers</subject><subject>Thickness</subject><subject>Time of arrival estimation</subject><subject>time-of-arrival (ToA)</subject><issn>0196-2892</issn><issn>1558-0644</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kM1KAzEYRYMoWKsPIG4Crqfmy_8sy6BVqAp1XId0kmmn2qQmM4u-vS0VV3dz7r1wELoFMgEg5UM9W3xMKAE5oRI4lewMjUAIXRDJ-TkaEShlQXVJL9FVzhtCgAtQI1TVcYoXNqy6sMI2ODy3e59wve6ar-BzxlXc7obe9l0MuAv4LYZ13MaVDz4OGb9619lrdNHa7-xv_nKMPp8e6-q5mL_PXqrpvGgYk33hWiabxlpKS6nIUmtFtHPANWirPKe65U4SRpfEOs5JqaVzgkm6FIw4IRkbo_vT7i7Fn8Hn3mzikMLh0lBQnFOlJRwoOFFNijkn35pd6rY27Q0Qc3Rljq7M0ZX5c3Xo3J06nff-n1eipJwK9gsu0mOe</recordid><startdate>201702</startdate><enddate>201702</enddate><creator>Jamalabdollahi, Mohsen</creator><creator>Zekavat, Seyed</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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| source | IEEE Electronic Library (IEL) |
| subjects | Angle-of-arrival Carrier frequencies Computation Computer simulation Delays Dispersion Distance measurement frequency dispersion Frequency division multiple access Frequency-domain analysis Inhomogeneous media Linear equations Media nonhomogeneous (NH) media OFDM orthogonal frequency division multiple access (OFDMA) ranging relative permittivity Signal to noise ratio Subcarriers Thickness Time of arrival estimation time-of-arrival (ToA) |
| title | ToA Ranging and Layer Thickness Computation in Nonhomogeneous Media |
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