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This paper considers the performance enhancement of orthogonal space time block coded (OSTBC) multiple-input multiple-output system based on an optimal training strategy. Pairwise error probability (PEP) based performance analysis provides us the training design tools as well as a generic expression for the performance improvement due to optimal training compared to the conventional case for OSTBC...
This paper proposes an idea of developing a model of estimating timing offset error of OFDM (Orthogonal Frequency Division Multiplexing) system without the use of additional pilots relying on inherent characteristics of the OFDM signal. An analytical expression has been derived and formulated to analyze the effect of bit error rate (BER) due to timing offset introduced by the transmission channel...
An energy efficient cooperative MIMO selection scheme is proposed for uniform load distribution in cluster based wireless sensor networks. The intrinsic data flow direction in multi hop cluster based sensor networks causes uneven load distribution in the network. The transit clusters and the clusters near the base station carry more network traffic than the other clusters. Cooperative MIMO can artistically...
We present an adaptive rate communication in conjunction with cooperative MIMO for uniform energy load distribution in wireless sensor networks (WSN). The inherent data flow structure of WSN causes uneven load distribution in the network. The transit nodes and the nodes near the base station (BS) carry more network traffic load than the other nodes in the network. We have analyzed the cooperative...
Power conservation is an issue which is to be dealt in sensor networks. The nature of sensor networks and their deployment makes it difficult for the optimal transmit power to be modified after they are deployed so a common transmit power has to be selected in such a way that makes the deployment more feasible and easier. An optimal transmit power can ensure better connectivity and longer battery...
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