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Spectrum sensing is one of the highly researched and focused area in cooperative cognitive networks. Energy and Cyclostationary Spectrum detection are the mostly used and efficient spectrum sensing techniques to detect the presence or absence of the primary user and to avoid interference. In this paper, the performance of Energy and Cyclostationary spectrum detection over Rayleigh, Nakagami and Additive...
Many relay selection algorithms have been suggested in the last few years. In this paper, we propose Fuzzy Logic based relay selection algorithm using three different parameters. Amplify and Forwardrelaying scheme has been used where required parameters for the proposed algorithm are relay residual power, SNR and traffic. With the considered parameters, the system achieves efficiency in terms of relay's...
This paper examines the effect on Outage probability and Detection probability by using Maximal Ratio Combining (MRC), Square Law Combining (SLC) along with the addition of two relay transmission protocols Amplify and Forward (AF) and Decode and Forward (DF) over Rayleigh Fading Channel. In MRC the co-phased signals with highest Signal to Noise Ratio (SNR) are taken where SLC does not rely on phase...
Satellite communication technology can well address for global communication system concern along imperative features. Network coding techniques are implicit for future wireless communication network demands in terms of throughput, security and robustness. Physical layer network coding (PNC) and Analog network Coding (ANC), are considered as two of the most studied variants of the network coding....
In this paper, we tackle the issue of cooperative spectrum sensing in cognitive radio network with path loss effects. Cooperative relays are introduced between primary user and cognitive center. The deteriorating effect of path loss is evaluated by measuring the detection performance of energy detector employed in cognitive radio network. Both single relay and multiple relays regimes are employed...
The Cognitive Radio (CR) continuously monitors the spectrum to detect the presence or absence of the primary user. Cyclostationary is one the efficient spectrum sensing method as it can differentiate among signal, interference and noise in low SNR. In this paper we illustrate the cooperation in cognitive radios by using the Cyclostationary sensing method. We consider the case of cognitive radio cooperating...
In this paper the performance of bit-interleaved coded modulation with iterative decoding (BICM-ID) based multiple-relay cooperative system is analyzed over Nakagami-$m$ fading channels. The relays are operating in amplify-and-forward (AF) mode. The moment generating function (MGF) based approach is used to obtain the theoretical error-free feedback (EF) bounds. The results show that a significant...
The performance of bit-interleaved coded modulation-iterative decoding (BICM-ID) based cooperative network is analyzed over Rayleigh and Nakagami-m fading channels. The relays are assumed to be operating in amplify-and-forward (AF) configuration. The bit error rate (BER) bounds of single-relay cooperative system with the serial concatenated BICM-ID using the 8-PSK modulations with maximal ratio combining...
User cooperation technique exploits the diversity in wireless networks. In this paper, we have analyzed a hybrid FDMA-TDMA access technique in a cooperative distributive fashion introducing and implementing a modified protocol introduced. We have defined one parameter termed as cooperation gain parameter (CGP) which is the function of transmitter-to-receiver average received signal to noise ratios...
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