Name
Title | ||
|---|---|---|
Characterization of Angular Spread in Underground Tunnels Based on the Multimode Waveguide Model |
Abstract | ||
|---|---|---|
One of the biggest challenges facing wireless designers is determining how to configure multiple-input-multipleoutput (MIMO) antennas in underground-environments, such as mines, so that they deliver best performance. Here, we showed that angular dispersion of the signal, a phenomenon that greatly impacts channel capacity, can be accurately predicted in both near-field and far-field of underground tunnels using a multimode waveguide. Not only this analytical model is much faster than other methods, but also it does not have other shortcomings of measurement-based modeling (e.g., poor resolution for far distances in the tunnel). Further, we characterized angular-spread for different tunnel sizes and showed that the power-azimuthspectrum can be modeled by a zero-mean Gaussian distribution whose standard-deviation (angular-spread) is dependent on the tunnel dimension and the transmitter-receiver distance. Angular-spread is found to be a decreasing function of axial distance. After a certain distance, it becomes very small (about 4°) and independent of tunnel transverse dimension. Our results are useful for design of MIMO systems in underground tunnels and sufficient to permit the correlation-matrix required to extend the IEEE 802.11n MIMO channel model to underground environments. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/TCOMM.2014.2363126 | Communications, IEEE Transactions |
Keywords | Field | DocType |
Gaussian distribution,MIMO communication,antenna arrays,channel capacity,radio receivers,radio transmitters,tunnels,wireless LAN,IEEE 802.11n,MIMO antennas,MIMO channel,angular spread,channel capacity,correlation matrix,multimode waveguide,multiple-input-multipleoutput antennas,power azimuth spectrum,standard deviation,transmitter-receiver distance,tunnel dimension,tunnel size,tunnel transverse dimension,underground environments,underground tunnels,wireless designers,zero-mean Gaussian distribution,Angular Spread,Multimode Waveguide Model,Power Azimuth Spectrum,Power azimuth spectrum,Underground Tunnel,angular spread,multimode waveguide model,underground tunnel | Multi-user MIMO,Ray tracing (graphics),Computer science,Waveguide,MIMO,Azimuth,Electronic engineering,Gaussian,Multi-mode optical fiber,Channel capacity | Journal |
Volume | Issue | ISSN |
62 | 11 | 0090-6778 |
Citations | PageRank | References |
1 | 0.40 | 6 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Arghavan Emami-Forooshani | 1 | 1 | 0.40 |
| Sima Noghanian | 2 | 39 | 11.43 |
| David G. Michelson | 3 | 116 | 17.07 |