Multiple Access Relay Network :: Technology, Network

We consider a six-fold access pass on race lucre where eachsource transmit channel coded packets, relay decode the transferpacket, generate meshwork coded parity symbol, and retransmitit. We dare the relay has multiple antennas, sorelay to destination link is MIMO channel. We consider twoMIMO transmission system system mode at the relay, spatial multiplexing(SM) and beamforming as transmit diversity (TD), and assumethat the relay use different net code scheme dependingon the MIMO transmission mode. In other words, we considera network with trinity types of linear combination channel code at the source, network cryptogram at the relay, and mixingover the air with MIMO channel. The main objective of the constitution is to propose a transmission mode selection schemeat the relay which optimize these three linear combinationsconcurrently.There are legion(predicate) work that optimize either the networkcoding, MIMO transmission mode, or entropy rate over multipleaccess rela y channel. Network coding techniques for singleantenna relay network has been addressed in 1 - 4. Authorsin 1 investigated the cooperative diversity master offered by thenetwork coding. Authors in 2 proposed a network codingscheme based on low-density parity-check (LDPC) codes thataccounts for the lossy nature of wireless networks and showedthat a significant coding/diversity gain can be achieved. Authorin 3 investigated the tradeoff between dependableness and rateas a function of node density and SNR, and showed howthe vim and node density can be traded in achieving a tending(p) reliability-rate pair in single antenna case. Authors in4 analyzed an network coded cooperation which adaptivelymatch networks-on-graphs to the well-known class of codeson-graphs such as LDPC codes. This approach enables realtime version of network codes to variant link states andchanging network topologies. Network coding for multiple antennashave been studied for special network geometry in 5,6. Authors in 5 proposed a cross-layer design employingmultiple antenna techniques and network coding called MIMO bipartite relay for one dimensional mesh network and authorsin 6 investigated the proceeding of MIMO network codingin bi-directional relay network. Adaptive relay communications protocol hasbeen proposed for a network with single antenna relays in 7- 9 and for a network with multiple antennas using amplifyand forward protocol in 10, 11. Authors in 11 proposedan adaptive antenna selection scheme at both the relay and thesource for half-duplex MIMO amplify and forward relay protocol.Rate optimization for relay network has been addressedin 12, 13. Authors in 12 proposed throughput optimalcontrol constitution for a parallel relay network with decode andforward protocol. Authors in 13 analyzed the performanceof variable-rate two phase collaborative diversity protocols andoptimized the transmission rate based on the node location.