Algorithms for Cooperative Transmission in MIMO based Mobile Adhoc Networks using broadcast in Opportunistic Large Array

MIMO based Mobile adhoc network is a collection of mobile adhoc nodes with multiple antennas. Each node forward data from one to others and produces and consumes data of its own. Conventional flooding broadcast in Mobile adhoc network has many sources of inefficiency. A new physical layer technique[1,2] for broadcasting in multi-antenna mobile adhoc networks makes broadcast a much more efficient than traditional flooding broadcast. This broadcasting technique requires that all nodes that receive a message retransmit it at the same time. Because the messages are identical, interference can be constructive rather than destructive. The multiple transmitters act as an antenna array – an Opportunistic Large Array, or OLA – to transmit the message farther and ultimately with fewer hops than it could have been transmitted by conventional means. This paper presents several networking algorithms for utilizing such physical layer broadcast to solve problems of multiple antenna mobile adhoc networks. The main goal of many applications of mobile adhoc networks is not only the mutual communication among the nodes themselves but also to enable the transmission of locally generated data to a distant receiver which has extremely low MSE(Mean Square Error) with respect to each individual node.