Measurements and Models of 802.11B Signal Strength Variation Over Small Distances
| Author(s) | Shin, Hweechul | |
| Date Accessioned | 2010-06-07T19:50:48Z | |
| Date Available | 2010-06-07T19:50:48Z | |
| Publication Date | 2010 | |
| Abstract | This thesis presents results froma comprehensive channel measurement study. The 802.11 b/g channel was studied in 25 locations, including 14 indoor channels and 11 outdoor channels, where each measured used 11 wide bandwidths channels. For each location, measurements were taken along a 3 meter strip with 1.5 cm between each measurement, where the location of each measurement was controlled by a robotic linear actuator. Several hundred measurements were taken at each location, ensuring precise estimate of the signal strength. In all, 77 million signal strength measurements were made. However, in order to develop and verify the quality of the measurement, far more measurements were made. The collected data was used to estimate the change in signal strength as a function of the displacement. The observed change in signal strength wasmodeled with a standard channel model that contains a fast fading component and a lognormal shadowing component. While this standard model provided a good fit, we found that the lognormal shadowing component has much less spatially correlated than previous studies had found. Thus, this thesis developed a new model for the correlation of lognormal shadowing. Considering that the 802.11 b/g channel is a wide bandwidth channel (which reduce channel variations caused by fast fading), this study finds more significant variations in signal strength than has been previously known. | en |
| Advisor | Bohacek, Stephan K. | |
| Degree | M.S. | |
| Department | University of Delaware, Department of Electrical and Computer Engineering | |
| URL | http://udspace.udel.edu/handle/19716/5177 | |
| Publisher | University of Delaware | en |
| dc.subject.lcsh | IEEE 802.11 (Standard) | |
| dc.subject.lcsh | Wireless communication systems | |
| dc.subject.lcsh | Signal detection | |
| Title | Measurements and Models of 802.11B Signal Strength Variation Over Small Distances | en |
| Type | Thesis | en |