Trung Dung Nguyen

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A special case of the discrete memoryless cooperative broadcast channel, as defined by Dabora and Servetto, is investigated. The capacity region is provided in the case where the information messages are sent over a deterministic broadcast channel (Y1, Y2) = h(X) with a (C12, C21)-admissible conference link between the receivers. In this framework we also(More)
Routing protocol is an important issue in mobile adhoc network (MANET). One of the most popular protocols is AODV [5] routing protocol. There have been many proposed protocols based on it, for example ERS and EERS [1]. Most of them select the best path using hopcount parameter. In this paper, beside hopcount parameter, we also use energy parameter to select(More)
In this paper, a novel medium access control (MAC) protocol based on orthogonal frequency division multiple access (OFDMA) technology operating in time division duplexing (TDD) called MAC-TO for adhoc and multihop networks is proposed in order to counteract mobility, co-channel interference (CCI), hidden terminals and exposed nodes problems. In this method,(More)
Hybrid Automatic-Repeat-Request (H-ARQ) Aided Systematic Luby Transform (SLT) Coded Modulation is proposed, where SLT codes are used both for correcting erroneous bits and for detecting as well as retransmitting erroneous Internet Protocol (IP) based packets. Erroneous IP packet detection is implemented using syndrome checking with the aid of the SLT codes’(More)
In this paper, a new MAC and Network cross layer protocol for OFDMA-based Multi-hop Ad-hoc Networks is proposed. In wireless network, when a route is established, the radio resource allocation problems at MAC layer may decrease the end to end performance proportionally with the length of each route. The contention at MAC layer may causes routing protocol to(More)
This paper investigates the performance of Vertical Bell Laboratories Layered Space Time (V-BLAST) architecture for multi input multi output orthogonal frequency division multiple access (MIMO-OFDMA) system. VBLAST is a successive cancellation method applied to the receiver to obtain the highest SNR. Performance of MIMO systems in realistic radio(More)
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