A New Distributed Cooperative MIMO

9 In this paper, we introduce a new communication scheme based on cooperative 10 multiple-input multiple-output (MIMO) communication for mobile ad hoc networks 11 (MANETs) in which nodes are endowed with M antennas. According to our new 12 approach, adjacent nodes no longer interfere with each other but rather cooperate 13 attempting to communicate concurrently. In our scheme, during transmissions, the 14 nodes send packets from only one of their antennas, while during reception, they 15 use all of their antennas to receive and decode packets from multiple close nodes 16 simultaneously. Therefore, each distributed MIMO system in this scheme consists 17 of multiple transmitting nodes acting as a single-array of multiple antennas. We 18 derive upper and lower bounds on the receiver node ergodic capacity in the network 19 where the wireless channel is modeled with both large and small-scale fluctuations. 20 These bounds are compared with Monte-Carlo simulation of point-to-point and 21 cooperative MIMO communications in MANETs. We demonstrate that the capacity 22 of MANETs with multiple antennas is improved using cooperation compared to non23 cooperative schemes, i.e., point-to-point MIMO communication. In addition, under 24 the above communication model, we demonstrate that the lower and upper bounds 25 of the ergodic capacity grows linearly with the number of receiving antennas M . 26