ABSTRACT A new near-optimum detection scheme for asynchronous wireless relay networks is proposed... more ABSTRACT A new near-optimum detection scheme for asynchronous wireless relay networks is proposed to cancel the interference component at the destination node caused by timing misalignment from the relay nodes. The detection complexity at the destination node as compared with a previous sub-optimum detection scheme is reduced. Closed-loop extended orthogonal space time block coding and outer convolutive coding are utilised to maximise end-to-end performance. A relay selection technique is also proposed in this study for two dual-antenna relay nodes to enhance the system performance by selecting the best links and the smallest time delay error among the relay nodes. Simulation results confirm that the proposed nearoptimum detection scheme with relay selection is very effective at removing intersymbol interference at the destination node and achieving full cooperative diversity with unity data transmission rate between the relay nodes and the destination node.
In this paper we investigate wireless relay networks for two way communication over a four node G... more In this paper we investigate wireless relay networks for two way communication over a four node Gaussian relay channel based on closed-loop extended orthogonal space time block codes (EO-STBCs) with all relays forming a distributed space time block code (D-STBC) to aid the communication between both terminals. Full data rate and full cooperative diversity can be obtained by using closed-loop D-EO-STBC. Only limited feedback information based upon channel state information (CSI) available at one of the receiving terminals is required. Simulation results based on end-to-end bit error rate (BER) illustrate that the two-way communication can achieve a good performance with simple linear processing and outperforms other two-way schemes.
2011 7th International Wireless Communications and Mobile Computing Conference, 2011
In this paper distributed space time block codes (D-STBCs) are applied within an asynchronous two... more In this paper distributed space time block codes (D-STBCs) are applied within an asynchronous two-way cooperative wireless relay network using two relay nodes. A parallel interference cancelation (PIC) detection scheme with low structural and computational complexity is applied at the terminal nodes in order to overcome the effect of imperfect synchronization among the cooperative relay nodes. Simulation results based on
In this paper distributed space time codes (D-STBCs) are applied within an asynchronous cooperati... more In this paper distributed space time codes (D-STBCs) are applied within an asynchronous cooperative wireless relay network to achieve significant performance gain for the case of two relay nodes. Since interference at symbol level is an issue that reduces the performance gain in cooperative relay networks, a parallel interference cancellation (PIC) detection scheme at the destination node is applied to
ABSTRACT A new near-optimum detection scheme for asynchronous wireless relay networks is proposed... more ABSTRACT A new near-optimum detection scheme for asynchronous wireless relay networks is proposed to cancel the interference component at the destination node caused by timing misalignment from the relay nodes. The detection complexity at the destination node as compared with a previous sub-optimum detection scheme is reduced. Closed-loop extended orthogonal space time block coding and outer convolutive coding are utilised to maximise end-to-end performance. A relay selection technique is also proposed in this study for two dual-antenna relay nodes to enhance the system performance by selecting the best links and the smallest time delay error among the relay nodes. Simulation results confirm that the proposed nearoptimum detection scheme with relay selection is very effective at removing intersymbol interference at the destination node and achieving full cooperative diversity with unity data transmission rate between the relay nodes and the destination node.
In this paper we investigate wireless relay networks for two way communication over a four node G... more In this paper we investigate wireless relay networks for two way communication over a four node Gaussian relay channel based on closed-loop extended orthogonal space time block codes (EO-STBCs) with all relays forming a distributed space time block code (D-STBC) to aid the communication between both terminals. Full data rate and full cooperative diversity can be obtained by using closed-loop D-EO-STBC. Only limited feedback information based upon channel state information (CSI) available at one of the receiving terminals is required. Simulation results based on end-to-end bit error rate (BER) illustrate that the two-way communication can achieve a good performance with simple linear processing and outperforms other two-way schemes.
2011 7th International Wireless Communications and Mobile Computing Conference, 2011
In this paper distributed space time block codes (D-STBCs) are applied within an asynchronous two... more In this paper distributed space time block codes (D-STBCs) are applied within an asynchronous two-way cooperative wireless relay network using two relay nodes. A parallel interference cancelation (PIC) detection scheme with low structural and computational complexity is applied at the terminal nodes in order to overcome the effect of imperfect synchronization among the cooperative relay nodes. Simulation results based on
In this paper distributed space time codes (D-STBCs) are applied within an asynchronous cooperati... more In this paper distributed space time codes (D-STBCs) are applied within an asynchronous cooperative wireless relay network to achieve significant performance gain for the case of two relay nodes. Since interference at symbol level is an issue that reduces the performance gain in cooperative relay networks, a parallel interference cancellation (PIC) detection scheme at the destination node is applied to
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