Title :
Theoretical ground reflection model for UWB communication systems
Author :
Promwong, Sathapom ; Takada, Jun-ichi ; Supanakoon, Pichaya ; Tangtisanon, Prakit
Author_Institution :
Graduate Sch. of Sci. & Eng., Tokyo Inst. of Technol., Japan
Abstract :
In this paper, the theoretical ground reflection model for UWB communication systems is proposed. The passband rectangular pulse with specific center frequency and bandwidth is used as the transmitted signal. The complex form Friis´ transmission formula is applied for the UWB ground reflection channel. The received signal is evaluated. The UWB path loss is defined as the ratio between the maximum amplitude of the transmitted and received signal waveforms. The closed form path loss expression is derived. For the data processing, the path loss and rms delay spread of the ground reflection model are considered for the 1.00, 0.10 and 0.01 m antenna heights. The double linear regression for the path loss is modeled by using the first Fresnel zone and MMSE break points. The rms delay spread as a function of the antenna height and the path loss is investigated. The characteristics of the path loss and rms delay spread are discussed in the paper.
Keywords :
Fresnel diffraction; electromagnetic wave reflection; least mean squares methods; microwave propagation; regression analysis; ultra wideband communication; Fresnel zone; MMSE break points; UWB communication systems; UWB path loss; antenna height; closed form path loss expression; complex form Friis transmission formula; double linear regression; ground reflection channel; passband rectangular pulse; rms delay spread; theoretical ground reflection model; Bandwidth; Data processing; Delay; Frequency; Fresnel reflection; Linear regression; Passband; Propagation losses; Reflector antennas; Ultra wideband communication;
Conference_Titel :
Communications and Information Technology, 2004. ISCIT 2004. IEEE International Symposium on
Print_ISBN :
0-7803-8593-4
DOI :
10.1109/ISCIT.2004.1413910
