%0 Electronic Article %A Mahsa Shirzadian Gilan %A Ali Olfat %K MIMO relays %K multiple-input–multiple-output relays %K selection relaying protocol %K SISO relays %K noise figure 3.0 dB %K novel distributed space-time coding transmission scheme %K end-to-end bit error rate %K two-path successive relay network %K relay nodes %K beamforming method %K bandwidth-efficient scheme %K single-input–single-output %K quasiDSTC scheme %K DSTC transmission scheme %K new beamforming %K noise figure 4.0 dB %K enjoys threshold %K noise figure 2.5 dB %K inter-relay channel %K successive relaying %X Successive relaying is a bandwidth-efficient scheme in cooperative networks. In this study, a novel distributed space-time coding (DSTC) transmission scheme for a two-path successive relay network is proposed that enjoys threshold-based selection relaying protocol. A new beamforming method is also employed alongside the proposed DSTC transmission scheme. Three scenarios are considered in this study. In the first scenario, single-input–single-output (SISO) relays are considered. In the second and third scenarios, multiple-input–multiple-output (MIMO) relays are used, but in the second case a transmission scheme named as quasi-DSTC scheme alongside employing space-time coding at each relay is proposed. A closed-form expression for the end-to-end bit error rate (BER) of the system is derived and it is shown that regardless of the fading in inter-relay channel, the proposed scheme achieves full diversity order even when there are decoding errors at the relay nodes. Simulation results show a significant saving in power of about 2.5, 3, and 4 dB at BER ( 10 − 4 ) compared with other conventional methods in the case of using SISO relays, MIMO relays in the second and third scenarios, respectively. %@ 1751-8628 %T New beamforming and space-time coding for two-path successive decode and forward relaying %B IET Communications %D August 2018 %V 12 %N 13 %P 1573-1588 %I Institution of Engineering and Technology %U https://digital-library.theiet.org/;jsessionid=y8tprtgwknv0.x-iet-live-01content/journals/10.1049/iet-com.2017.1272 %G EN