التفاصيل البيبلوغرافية
| العنوان: |
Simulations and Measurements of Wave Propagations in Curved Road Tunnels for Signals from GSM Base Stations |
| المؤلفون: |
Wang, Te-Shun, Yang, Chang-Fa |
| المساهمون: |
資訊工程系 |
| سنة النشر: |
2006 |
| المجموعة: |
YuanPei University Institutional Repository (YPUIR) |
| مصطلحات موضوعية: |
Mobile communications, ray tracing, tunnel, uniform theory of diffraction (UTD), wave propagation |
| الوصف: |
This paper presents a ray-tube tracing method to simulate waves propagating in curved road tunnels from base stations for mobile communications. Ray tubes are traced by including multiple reflections in the curved tunnels and diffractions from wedges of the tunnel structures, together with the direct path. To verify this ray-tube tracing approach, field measurements of 900 MHz signals in two curved road tunnels from GSM base stations were performed for comparisons with the ray-tube tracing simulations. By tracing ray tubes re?ected and diffracted from the curved structures of the tunnels, the effects of the curvature on wave propagations in large guiding structures can be evaluated. Good agreement between simulations and measurements has been obtained. A parametric study of the in?uence of the tunnel geometry and the signal frequency on the path loss is also presented by applying this ray-tube tracing method. Curved tunnels for different radii of curvature in the tunnel cross-section and horizontal plane and also lengths of the curved part are compared, together with rectangular tunnels. Simulations of the ?eld distribution over the cross-section of the curved tunnel away from the transmitting antenna are demonstrated as well. The ray-tube tracing program can be applied to determine the deployment of the base-station antennas for improving signal coverage in tunnels, which may have curved structures. |
| نوع الوثيقة: |
other/unknown material |
| اللغة: |
English |
| العلاقة: |
IEEE Transactions on Antennas and Propagation Vol. 54，2577-2584; http://120.106.195.12/handle/310904600Q/3336Test |
| الإتاحة: |
http://120.106.195.12/handle/310904600Q/3336Test |
| رقم الانضمام: |
edsbas.EAAB8642 |
| قاعدة البيانات: |
BASE |
