Wideband indoor channel characterisation at 1.95 GHZ

• Main Author: Wong, Meng Teck.
• Other Authors: Law, Choi Look
• Format: Theses and Dissertations
• Language: English
• Published: 2009
• Subjects: DRNTU::Engineering::Electrical and electronic engineering
• Online Access: http://hdl.handle.net/10356/19698
• Institution: Nanyang Technological University

This thesis presents the characterisation of the indoor channel for high speed wireless Local Area Network (LAN) applications using directive rectangular Microstrip Patch Antennae (MPA) at 1.95 GHz. Wideband impulse response measurements using a vector network analyser were taken in two typical laboratories settings. Different antenna height configurations were used in the experiments (2 m, 1.5 m, optimised heights A and B). Key parameters like the root mean square (rms) delay spread and the path loss characteristics were analysed. They change with the different types of antenna height configurations. The optimised height B configuration (where a transmitter is placed at 2 m high while the receiver at 1.5 m high with both antennae facing at boresights) was found to be the best antenna height configuration. On the average (regardless of antenna height configurations), the median rms delay spread found was smaller as compared to other researchers who used omni-directional antennae. This result is significant as a reduction in the rms delay spread will indicate a potential increase in the transmission rate.