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: |
2003 |
| المجموعة: |
YuanPei University Institutional Repository (YPUIR) |
| مصطلحات موضوعية: |
Mobile Communications, Base-station, Antenna, FDTD, Ray Tracing Method, Wave Propagation |
| الوصف: |
Simulations and measurements of wave propagations in tunnels have been performed by many investigators ; e.g., [1]-[10]. In [5]-[7], measurements were presented for propagation characteristics in straight tunnels having rectangular cross-sections, and the ray-optical method was applied to simulate the field distributions. A ray launching approach with the Monte Carlo method has been proposed to determine the propagation properties in curved tunnels [2][3], and wave propagations in tunnels with and without traffic were modeled with a shooting and bouncing ray (SBR) image method [1]. In [4] and [8], some statistical characteristics of the propagation channel in tunnels were described. As for [9] and [10], the ray-optical method with ray density normalization was developed to determine wave propagations for GSM bands in underground railroad tunnels. This paper presents a ray-tube tracing method for wave propagations in curved tunnels. The waves from a transmitting antenna are modeled with many ray tubes [11], and those ray tubes are traced by including multiple reflections and diffractions from curved structures. Measurements for signals in curved road tunnels from GSM900/1800 base stations have been performed and are compared with those obtained from the ray-tube tracing method. |
| نوع الوثيقة: |
other/unknown material |
| اللغة: |
English |
| العلاقة: |
2003 IEEE AP-S International Symposium and URSI Radio Science Meeting; http://120.106.195.12/handle/310904600Q/2154Test |
| الإتاحة: |
http://120.106.195.12/handle/310904600Q/2154Test |
| رقم الانضمام: |
edsbas.E9C7F3E3 |
| قاعدة البيانات: |
BASE |
