Journal article
A Scalable Architecture for Distributed Transmit Beamforming with Commodity Radios: Design and Proof of Concept
IEEE transactions on wireless communications, Vol.12(3), pp.1418-1428
2013
DOI: 10.1109/TWC.2013.012513.121029
Abstract
We describe a fully-wireless prototype of distributed transmit beamforming on a software-defined radio platform. Distributed beamforming is a cooperative transmission technique that can achieve orders of magnitude increases in range or energy efficiency of wireless communication systems. However, this technique requires precise synchronization of the radio frequency signal from each transmitter. The significance of our prototype is in demonstrating that this requirement can be satisfied using digital signal processing methods on commodity hardware with low-quality oscillators. Our synchronization approach scales to large numbers of transmitters: each transmitter runs independent algorithms based on periodically transmitted feedback packets from the receiver. A key simplification is the decoupling of the algorithms for frequency locking and beamsteering at each transmitter, even though both processes use the same feedback packets. Frequency locking employs an Extended Kalman filter to track the local oscillator offset between a transmitter and the receiver, using frequency offset measurements based on the feedback packet it waveform, while the phase adjustments for beamsteering are determined using a one-bit feedback algorithm based on the feedback packet it payload. Our prototype demonstrates that distributed transmit beamforming can be incorporated into wireless networks without requiring hardware innovations, and provides open-source building blocks for future research and development.
Details
- Title: Subtitle
- A Scalable Architecture for Distributed Transmit Beamforming with Commodity Radios: Design and Proof of Concept
- Creators
- François QUITIN - Electrical and Computer Engineering Department, University of California, Santa Barbara (UCSB), United StatesMuhammad Mahboob UR RAHMAN - Electrical and Computer Engineering Department, University of Iowa, United StatesRaghuraman MUDUMBAI - Electrical and Computer Engineering Department, University of Iowa, United StatesUpamanyu MADHOW - Electrical and Computer Engineering Department, University of California, Santa Barbara (UCSB), United States
- Resource Type
- Journal article
- Publication Details
- IEEE transactions on wireless communications, Vol.12(3), pp.1418-1428
- Publisher
- Institute of Electrical and Electronics Engineers
- DOI
- 10.1109/TWC.2013.012513.121029
- ISSN
- 1536-1276
- eISSN
- 1558-2248
- Language
- English
- Date published
- 2013
- Academic Unit
- Electrical and Computer Engineering
- Record Identifier
- 9984083243302771
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