Abstract
This paper presents the measured wide-band characteristics of 900 and 1800 MHz band radio propagation channels in a tunnel environment for microcellular and personal communications. The measurements were made using the swept frequency technique. The analysis of the average measured power delay profiles reveals that the rms time delay spread is less than 25 ns when the tunnel is empty and can be as large as 103 ns when the tunnel is blocked by vehicles.
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Zhang, Y., Hwang, Y. & Ching, P. Wide-Band UHF Radio Propagation Characteristics in a Tunnel Environment. Wireless Personal Communications 8, 291–299 (1998). https://doi.org/10.1023/A:1008850705946
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DOI: https://doi.org/10.1023/A:1008850705946