Changes between Version 1 and Version 2 of MobiCom2010_WARP
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- Sep 21, 2010, 1:22:42 PM (14 years ago)
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MobiCom2010_WARP
v1 v2 7 7 We report a first-of-its-kind realization of directional transmission for smartphone-like mobile devices using multiple passive directional antennas, supported by only one RF chain. The key is a multi-antenna system (MiDAS) and its antenna selection methods that judiciously select the right antenna for transmission. It is grounded by two measurement-driven studies regarding 1) how smartphones rotate during wireless usage in the field and 2) how orientation and rotation impact the performance of directional antennas under various propagation environments. 8 8 9 We implement MiDAS and its antenna selection methods using the WARP platform. We evaluate the implementation using a computerized motor to rotate the prototype according to traces collected from smartphone users in the field. Our evaluation shows that MiDAS achieves a median of 3dB increase in link gain translates to 85% goodput improvement for a low SNR scenario. T He same gain translates to 51% transmit power reduction for a high SNR scenario. Compared to other methods in realizing directional communication, MiDAS does not require any changes to the network infrastructure, and is therefore suitable for immediate or near-future deployment.9 We implement MiDAS and its antenna selection methods using the WARP platform. We evaluate the implementation using a computerized motor to rotate the prototype according to traces collected from smartphone users in the field. Our evaluation shows that MiDAS achieves a median of 3dB increase in link gain translates to 85% goodput improvement for a low SNR scenario. The same gain translates to 51% transmit power reduction for a high SNR scenario. Compared to other methods in realizing directional communication, MiDAS does not require any changes to the network infrastructure, and is therefore suitable for immediate or near-future deployment. 10 10 11 11 == Citation == … … 13 13 @article{Amiri Sani:2010, 14 14 Author = {A. Amiri Sani, L. Zhong, and A. Sabharwal}, 15 Booktitle = { Proceedings of MobiCom 2010},15 Booktitle = {{ACM MobiCom}}, 16 16 Title = {Directional Antenna Diversity for Mobile Devices: Characterizations and Solutions}, 17 17 Year = {2010}}