Author_Institution :
Electr.-Electron. Eng. Dept., Atilum Univ., Ankara, Turkey
Abstract :
We present measurement results at 2.45 GHz to evaluate blockage/shadowing and fading effects due to furniture and people next to terminals for short range indoor communication systems. The following are the results: people crossing the link near to a terminal can cause fading of up to 20 dB, which is more than the measured furniture blockage of about 5-13 dB, depending on objects over the link; polarization coupling was also measured, by using a dual polarized antenna at the receiving end, and coupling is higher for obstructed links, which suggests the use polarization diversity (see Kim, S., "Modeling and Analysis of Indoor Wireless Communication Channel", Ph.D. Thesis, Polytechnic University, Brooklyn, 1995).
Keywords :
UHF radio propagation; electromagnetic wave polarisation; fading channels; indoor radio; packet radio networks; radiofrequency interference; wireless LAN; 2.45 GHz; Bluetooth; IEEE 802.11 WLAN; blockage measurements; dual polarized antenna; fading effects; polarization coupling; polarization measurements; radio propagation; shadowing measurements; short range indoor communication systems; Antenna measurements; Area measurement; Interference; Laboratories; Polarization; Radio frequency; Radio transmitters; Shadow mapping; Spectral analysis; Switches;
