Changes between Version 1 and Version 2 of MobiCom2010_WARP


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Timestamp:
Sep 21, 2010, 1:22:42 PM (11 years ago)
Author:
jdavis
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  • MobiCom2010_WARP

    v1 v2  
    77We 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. 
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    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.
     9We 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.
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    1111== Citation ==
     
    1313@article{Amiri Sani:2010,
    1414        Author = {A. Amiri Sani, L. Zhong, and A. Sabharwal},
    15         Booktitle = {Proceedings of MobiCom 2010},
     15        Booktitle = {{ACM MobiCom}},
    1616        Title = {Directional Antenna Diversity for Mobile Devices: Characterizations and Solutions},
    1717        Year = {2010}}