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Protection scheme for AC transmission systems are well understood and matured. On the other hand, DC system is still facing a challenge in developing proper protection scheme because of its natural characteristics. A protection scheme, which utilizes some of the developed techniques for AC system, and modified to suit the DC system characteristics, is proposed in this paper. The scheme is based on...
Relay assisted cellular system is a promising infrastructure redesign to enhance the performance of wireless systems. The use of intermediate nodes to relay information from source to destination can be efficient in eliminating black spots, extending coverage region, improving fairness in terms of capacity spread over the cell, saving power by reducing overall transmission and prolonging battery lifetime...
Network coding scheme improves throughput and reliability in a Wireless Sensor Network. A straight forward broadcasting by flooding in a wireless sensor network is very costly and reduce the network coding benefit. The packet loss probability increases due to contention and collision which is referred as broadcast storm problem. In this paper, we have proposed a Network Coding based Probabilistic...
Using a general two-parameter received signal-to-noise ratio (SNR) model for two-hop amplify-and-forward (AF) relaying, we analyze the error performance of binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK) modulation considering a dual-hop relay link and distributed selection combining (SC) adopted by the destination. The relay network consists of a single antenna AF relay,...
In this paper, we analyze the symbol error probability (SEP) performance of square M-ary quadrature amplitude modulation (M-QAM) with dual-hop relay transmission considering independent and non-identical flat Nakagami-m fading channels. The relay is operating under amplify-and-forward (AF) mode with average power scaling (APS) and instantaneous power scaling (IPS) constraints. Simplified closed-form...
This paper analyzes the error performance of two-hop relay network adopting M-ary frequency shift keying (MFSK) with noncoherent detection. It is assumed that dual-hop relay link consists of a source, a relay, and a destination without a direct path signal from the source to the destination and the relay cooperates with the source through the amplify-and-forward (AF) protocol with instantaneous power...
We analyze the end-to-end error performance of M-ary frequency shift keying (MFSK) with noncoherent detection over independent and non-identical flat Nakagami-m fading channels. A dual-hop relay transmission using amplify-and-forward (AF) protocol with average power scaling (APS) mechanism is considered. Generalized closed-form expressions for the average symbol error probability (ASEP) of noncoherent...
Wireless Sensor Networks (WSNs) are immensely deployed for monitoring information like humidity, temperature and soil fertility. As the sensor nodes sense data and floods them in the network, the network traffic increases and may result in congestion which leads to broadcast storm problem. This paper addresses the utility of network coding to optimize data aggregation and to decrease the number of...
In this paper we investigate the impact of fading correlation at the receiving elements of a compact antenna array in a relay assisted cooperative scheme in single-input multiple-output (SIMO) configuration with one or multiple relays operating in amplify-and-forward mode. We assume that the source and the relay terminals are each equipped with one antenna, while the destination terminal is equipped...
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