A robust approach to carrier sense for MIMO ad hoc networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
On the impact of channel estimation errors on MAC protocols for MIMO ad hoc networks
IEEE Transactions on Wireless Communications
Opportunistic and cooperative spatial multiplexing in MIMO ad hoc networks
IEEE/ACM Transactions on Networking (TON)
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In this paper, we consider a MAC protocol for ad hoc networks where nodes are equipped with multiple antennas, and communications are spatially multiplexed using the Bell labs layered space time (BLAST) system. The contribution of this paper is twofold. First, we introduce two different analytical models aimed at predicting the propagation of detection errors within the BLAST receiver, the first based on a Gaussian approximation of the detection errors, and the second on the weighed enumeration of error configurations. A simplification of the latter, with lower complexity, is also obtained and compared to the original model. We then use these analytical tools to assess the performance of a cross-layer MAC protocol, and compare it with fully detailed simulations. Since the analytical tools replace the simulation of the physical layer, the proposed semianalytical approach is much faster than the bit-by-bit simulations. Numerous results are provided for the network performance assessment, showing that our semianalytical approach is able to predict network behavior with very good accuracy, but much lower complexity.