Title :
Channel Sounding for the Masses: Low Complexity GNU 802.11b Channel Impulse Response Estimation
Author :
Maas, Dustin ; Firooz, Mohammad H. ; Zhang, Junxing ; Patwari, Neal ; Kasera, Sneha K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Utah, Salt Lake City, UT, USA
fDate :
1/1/2012 12:00:00 AM
Abstract :
New techniques in cross-layer wireless networks are building demand for ubiquitous channel sounding, that is, the capability to measure channel impulse response (CIR) with any standard wireless network and node. Towards that goal, we present a software-defined IEEE 802.11b receiver and CIR measurement system with little additional computational complexity compared to 802.11b reception alone. The system implementation, using the universal software radio peripheral (USRP) and GNU Radio, is described and compared to previous work. We validate the CIR measurement system and present the results of a measurement campaign which measures millions of CIRs between WiFi access points and a mobile receiver in urban and suburban areas.
Keywords :
channel estimation; communication complexity; mobile radio; radio receivers; software radio; transient response; wireless LAN; wireless channels; CIR measurement system; GNU radio; IEEE 802.11b reception alone; WiFi access point; computational complexity; cross-layer wireless network; low complexity GNU 802.11b channel impulse response estimation; mobile receiver; software-defined IEEE 802.11b receiver; standard wireless network; ubiquitous channel sounding; universal software radio peripheral; Bandwidth; Channel estimation; Correlation; Estimation; Field programmable gate arrays; Receivers; Wireless communication; GNU radio; IEEE 802.11b; RF propagation; Radio channel measurement; channel impulse response; multipath;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2011.111611.091774
