Paper Info
Title
Bringing multi-antenna gain to energy-constrained wireless devices
Abstract
Leveraging the redundancy and parallelism from multiple RF chains, MIMO technology can easily scale wireless link capacity. However, the high power consumption and circuit-area cost prevents MIMO from being adopted by energy-constrained wireless devices. In this paper, we propose Halma, that can boost link capacity using multiple antennas but a single RF chain, thereby, consuming the same power as SISO. While modulating its normal data symbols, a Halma transmitter hops between multiple passive antennas on a per-symbol basis. The antenna hopping pattern implicitly carriers extra data, which the receiver can decode by extracting the index of the active antenna using its channel pattern as a signature. We design Halma by intercepting the antenna switching and channel estimation modules in modern wireless systems, including ZigBee and WiFi. Further, we design a model-driven antenna hopping protocol to balance a tradeoff between link quality and dissimilarity of channel signatures. Remarkably, by leveraging the inherent packet structure in ZigBee, Halma's link capacity can scale well with the number of antennas. Using the WARP software radio, we have implemented Halma along with a ZigBee- and WiFi-based PHY layer. Our experiments demonstrate that Halma can improve ZigBee's throughput and energy efficiency by multiple folds under realistic network settings. For WiFi, it consumes similar power as SISO, but boosts throughput across a wide range of link conditions and modulation levels.
Year
DOI
Venue
2015
10.1145/2737095.2737099
IPSN
Keywords
Field
DocType
mobile devices,wireless communication,network protocols,mimo,energy efficiency
Transmitter,Wireless,Antenna gain,Software-defined radio,Computer science,Computer network,MIMO,Active antenna,Physical layer,Throughput
Conference
Citations 
PageRank 
References 
1
0.37
21
Authors
3
Name
Order
Citations
PageRank
Sur Sanjib114415.02
Teng Wei219913.38
Xinyu Zhang3134378.62