Phase Coherent EM Array Measurements in a Refractive Environment
| Autor: | Herbert Groll, Ali Dormiani, Christoph F. Mecklenbrauker, Peter Gerstoft, Venkatesh Sathyanarayanan, Mark Wagner |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | IEEE Transactions on Antennas and Propagation. 69:6783-6796 |
| ISSN: | 1558-2221 0018-926X |
| DOI: | 10.1109/tap.2021.3069516 |
| Popis: | Phase-coherent measurements of the pilot tone from a digital television (DTV) station were taken by a 24-element vertical array 168 km from the transmitter. Measurements were recorded over 15 days in Southern California, a region known for ducting events in which abnormal atmospheric refractivity patterns allow for the exceptionally long-range propagation of electromagnetic (EM) waves. The DTV station was positioned over the horizon (OTH) relative to the receiver array such that the line of sight was obstructed; thus, significant diffraction loss was expected. Direction-of-arrival (DOA) estimation was performed on the measurements. The measurement campaign objective was to collect the first long-term data set of DOA and the array-signal-to-noise ratio (ASNR) from signals propagating OTH through a refractive channel, toward the goal of enhancing the fidelity of atmospheric refractivity estimates. The analysis of the collected data shows that ASNR is correlated with atmospheric parameters related to refractivity. |
| Databáze: | OpenAIRE |
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