Wireless Communications
Precoding Schemes for the MIMO-GBC
IZS '06 Proceedings of the 2006 International Zurich Seminar on Communications
Interference alignment and cancellation
Proceedings of the ACM SIGCOMM 2009 conference on Data communication
SAM: enabling practical spatial multiple access in wireless LAN
Proceedings of the 15th annual international conference on Mobile computing and networking
Multiuser MIMO achievable rates with downlink training and channel state
IEEE Transactions on Information Theory
Efficient error estimating coding: feasibility and applications
Proceedings of the ACM SIGCOMM 2010 conference
Fine-grained channel access in wireless LAN
Proceedings of the ACM SIGCOMM 2010 conference
SourceSync: a distributed wireless architecture for exploiting sender diversity
Proceedings of the ACM SIGCOMM 2010 conference
Achieving single channel, full duplex wireless communication
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Design and experimental evaluation of multi-user beamforming in wireless LANs
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Pushing the envelope of indoor wireless spatial reuse using directional access points and clients
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Random access heterogeneous MIMO networks
Proceedings of the ACM SIGCOMM 2011 conference
Strider: automatic rate adaptation and collision handling
Proceedings of the ACM SIGCOMM 2011 conference
Proceedings of the 10th ACM Workshop on Hot Topics in Networks
Precoding in multiantenna and multiuser communications
IEEE Transactions on Wireless Communications
Writing on dirty paper (Corresp.)
IEEE Transactions on Information Theory
On the achievable throughput of a multiantenna Gaussian broadcast channel
IEEE Transactions on Information Theory
Duality, achievable rates, and sum-rate capacity of Gaussian MIMO broadcast channels
IEEE Transactions on Information Theory
A close-to-capacity dirty paper coding scheme
IEEE Transactions on Information Theory
Capacity and lattice strategies for canceling known interference
IEEE Transactions on Information Theory
Superposition coding for side-information channels
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
Combined equalization and coding using precoding
IEEE Communications Magazine
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
On the optimality of multiantenna broadcast scheduling using zero-forcing beamforming
IEEE Journal on Selected Areas in Communications
USC SDR, an easy-to-program, high data rate, real time software radio platform
Proceedings of the second workshop on Software radio implementation forum
NEMOx: scalable network MIMO for wireless networks
Proceedings of the 19th annual international conference on Mobile computing & networking
Adaptive feedback compression for MIMO networks
Proceedings of the 19th annual international conference on Mobile computing & networking
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A distributed MIMO system consists of several access points connected to a central server and operating as a large distributed multi-antenna access point. In theory, such a system enjoys all the significant performance gains of a traditional MIMO system, and it may be deployed in an enterprise WiFi like setup. In this paper, we investigate the efficiency of such a system in practice. Specifically, we build upon our prior work on developing a distributed MIMO testbed, and study the performance of such a system when both full channel state information is available to the transmitters and when no channel state information is available. In the full channel state information scenario, we implement Zero-Forcing Beamforming (ZFBF) and Tomlinson-Harashima Precoding (THP) which is provably near-optimal in high SNR conditions. In the scenario where no channel information is available, we implement Blind Interference Alignment (BIA), which achieves a higher multiplexing gain (degrees of freedom) than conventional TDMA. Our experimental results show that the performance of our implementation is very close to the theoretically predicted performance and offers significant gains over optimal TDMA. We also discuss medium access layer issues in detail for both scenarios. To the best of our knowledge, this is the first time that the theoretical high data rates of multiuser MIMO systems have been showcased in a real world distributed MIMO testbed.