A High-speed Indoor Wireless Communication System Employing an Anti-multipath Modulation Scheme
Grant-in-Aid for Scientific Research (B)
|Research Institution||Kyoto Sangyo University|
TAKEUCHI Tsutomu Faculty of Engineering, Kyoto Sangyo University, Professor, 工学部, 教授 (20154974)
|Project Fiscal Year
1996 – 1997
Completed(Fiscal Year 1997)
|Budget Amount *help
¥6,700,000 (Direct Cost : ¥6,700,000)
Fiscal Year 1997 : ¥3,500,000 (Direct Cost : ¥3,500,000)
Fiscal Year 1996 : ¥3,200,000 (Direct Cost : ¥3,200,000)
|Keywords||WLAN / multipath propagation / anti-multipath modulation scheme / multi-media communication / delay profile / time delay / mobile communication / fading / 無線LAN / 多重波伝搬 / 耐多重波変調方式 / マルチメディア通信 / 遅延プロファイル / 遅延時間 / 移動通信 / フェージング|
(1) Indoor multipath propagation measurement with high time delay resolution
A home-made channel sounder has revealed the mechanism of indoor multipath propagation characteristics in 3GHz band.
(2) Analysis on indoor multipath propagation
Three dimensional indoor propagation predictions by ray-tracing considering the effect of windows penetration were done. The results has shown a realistic delay profiles resembling the experimental results.
(3) Consideration on generating method of Active fading
From above results, Active fading generating method has been investigated to ensure the best performance. The resulting method is the simultaneous transmission of signals from the antennas positioned at the center of the room with slight offset. This was estimated by a graphical simulation tool developped by investigator.
(4) Construction of laboratory experimental setup for bit error rate measurement
A laboratory experiment system was set up for bit error rate measurement under Active fading environment and frequency selective fading environment. This system ensures the performance comparison between above two fading environments.
(5) Considerations on bit rate enhancement
For future work, to achieve more than a hundred Mb/s transmission rate, frequency division multiplexing will be considered.
Research Output (9results)