Performance Analysis and Comparison of Modulation and Congestion Techniques in Cognitive Radio Networks
Conference
Aulakh, IK, Kaur, N, Malhotra, M et al. (2019). Performance Analysis and Comparison of Modulation and Congestion Techniques in Cognitive Radio Networks
. 1076 208-218. 10.1007/978-981-15-0111-1_19
Aulakh, IK, Kaur, N, Malhotra, M et al. (2019). Performance Analysis and Comparison of Modulation and Congestion Techniques in Cognitive Radio Networks
. 1076 208-218. 10.1007/978-981-15-0111-1_19
The objective of CR Technology is to improve the spectrum efficiency of frequency band allocation among unlicensed users in the wireless environment. In Cognitive Radio Systems the parameters of carrier frequency, signal bandwidth, modulation and network access are based on observations of the spectrum white holes. Secondary users in order to get channel access, adjust their operational parameters and protocols dynamically and autonomously. Modulation and congestion techniques are two important variables used to increase the cognitive radio system performance. Digital modulation techniques reduce the bandwidth requirement per signal hence larger number of users or signals can be accommodated within the same available bandwidth. When load on a network exceeds its capacity then Congestion occurs. If there is more congestion in the network, it leads to the performance degradation. Controlling Congestion means using methods that either stop or decrease it even prior to its occurrence or removes it after its occurrence. In this paper a CRN has been analyzed, with three incumbents along with five secondary transmitters, for network delay and packets with error for three modulation techniques. Further the system has been tested for throughput and spectral efficiency for different congestion techniques. For designing and simulating this network, the software tool used is NetSim.
