Indian Journal of Science and Technology

Abstract

Background/Objectives: Cognitive radios are future communication devices which will have the ability to bring revolution in communication systems. The major role of cognitive radios to sense its surrounding environment to use white spaces in spectrum for complete utilization of spectrum band. Methods: This paper presents a lightweight solution to mitigate the shadow fading using the one-bit padding factor by using data packets or acknowledgements exchanged between the two cognitive ends. Findings: The proposed model called Multiple Frequencies Sensing − One-Bit Parent Frequency Management (MFS-OBPFM) works on the principle of exchange of bit information which is processed and analyzed on the receiver side, and analyzed for the spectrum availability pattern. The shadow fading patterns are found and analyzed in time domain and data is scheduled according to these shadow fading patterns. The frequency domain is designed according to the spectrum availability factor. The proposed model is expected to give the performance parameters of throughput, time complexity, total energy consumed and number of reports by the primary and secondary user. The proposed model has been tested on the basis of various performance parameters of energy, time, etc. The proposed model has shown efficient results in the terms of performance parameters than the existing models. Improvements: The proposed model is consuming less energy in different data volume transmission as compared to the energy efficient model in same data volume.

Keywords: Cognitive Radios, Communication Systems, Shadow Fading, Spectrum Sensing