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| | 講演要旨(英文) | | In this paper, we proposed a new cross-correlation sum making use of the complex analytic signal to calculate the coherency of the signals for velocity spectrum analysis. It can estimate the velocity from multi-channel dataset robustly even signal of low SNR. On the other hand, a vector network analyzer based GPR system with an antenna array was developed. The antenna array consisted of one transmit antenna and five receive antennas and it can detect the refection signals at different antenna offset with a high signal-to-clutter ratio. Air layer, gypsum wall and concrete wall of different thickness from 10cm to 15cm were tested and four field dataset on highway road were collected. The estimation results of dielectric constant and layer thickness validated the accuracy. The maximum error of the thickness estimation was only 1.3cm and the relative error was smaller than 11%. |
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