Performance Comparison of Uplink Cognitive Cellular Network under Rayleigh and Nakagami-m Fading Environments
M. Nazimuzzaman1, Himadri S. Saha2, Md. Imdadul Islam3, M. R. Amin4
1M. Nazimuzzaman, Department of Electronics and Communications Engineering, East West University, Dhaka, Bangladesh.
2Himadri S. Saha, Department of Electronics and Communications Engineering, East West University, Dhaka, Bangladesh.
3Md. Imdadul Islam, Department of Computer Science and Engineering, Jahangirnagar University, Dhaka, Bangladesh.
4M. R. Amin, Department of Electronics and Communications Engineering, East West University, Dhaka, Bangladesh.
Manuscript received on October 09, 2011. | Revised Manuscript received on October 24, 2011. | Manuscript published on November 05, 2011. | PP: 276-280 | Volume-1 Issue-5, November 2011. | Retrieval Number: E021910511/2011©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this paper we consider a mobile cellular network where two types of users: primary user (PU) and cognitive user (CU) share the entire spectrum of the base station (BS). Opportunistic scheduling scheme of CU is widely used to alleviate interference between CU and PU users. Recent literature deals with such networks under Rayleigh fading environment. The objective of this paper is to determine the performance of such networks under Nakagami-m fading environment and to compare the results with the results for the Rayleigh fading model. The paper shows the comparison of average bit error rate (BER) and mean channel capacity of target transmission rate taking outage probability as a parameter. It is found that for comparatively lower value of the outage probability the Nakagami-m fading has higher BER than the corresponding Rayleigh fading case whereas for higher values of the outage probability the situation becomes reverse. It is further observed that the channel capacity under Nakagami-m fading environment is better than the Rayleigh fading environment. The paper depicts the real-time performance with some explanations.
Keywords: PU, CU, average BER, mean channel capacity, opportunistic spectrum access, target transmission rate.