Joint MIMO-OFDM MAC Design for Battlefield Ad Hoc Networks

Authors:

Taiwen Tang, Minyoung Park, Robert W. Heath, Jr. and Scott M. Nettles

Reference:

Submitted to IEEE Journal on Selected Areas in Communications, 2004.

Abstract:

Multihop wireless mobile ad hoc networks are ideally suited to battlefield use. Such networks, however, face significant problems due to the complex propagation environment encountered by wireless link, not to mention the increasing demands of high data rate multimedia traffic. This paper presents a joint design for a broadband ad hoc network that solves these problems by using a medium access control MAC) protocol that leverages multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) communication technology. The proposed design uses the recently developed Mitigating Interference using Multiple Antennas MAC (MIMA-MAC) [1], to take advantage of the ability of MIMO-OFDM to demodulate multiple data streams to solve a key problem of 802.11-style MACs. Robust performance in broadband channels is guaranteed through the use of a new space-time interference cancelling receiver for MIMO-OFDM ad hoc networks which suppresses co-channel interference and jammers, separates out multiple data streams, and minimizes inter-carrier interference [2]. Joint physical and higher layer simulations confirm that our joint design experiences good performance both in terms of throughput and fairness, while with just the proposed physical layer, a 802.11-style MAC does not.


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