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This paper investigates cognitive radio network (CRN) performance through cooperative multiple cognitive radio relays and relay selection with channel allocation scheme. In one approach the overall end-to-end throughput (OEET) improves as the number of cognitive radio relays (CRRs) increases in CRN. In this approach, the OEET increases with the number of CRRs but at the cost of increased transmission...
Dual-tone multi-frequency (DTMF) is a signaling standard in telecom applications that produces two tones simultaneously for each key press. The DTMF tones are chosen such that decoding the pressed key from the received tones is very easier. The DTMF tone detection is very crucial block in several telecom based embedded systems. As the current generation embedded systems are looking for key feature...
Cooperative cognitive radio network (CCRN) has gained much attention in the literature of wireless communication. In CCRN, cooperative relaying stimulates primary user (PU) to lease more spectrum to secondary users (SUs). This paper proposes a two stage joint power and spectrum allocation scheme for a CCRN. In the proposed scheme, PU leases unused licensed spectrum to multiple SUs using the frequency...
With increasing demand for higher data rate, better quality of service, and higher network capacity, there is a migrat\ion from Single Input Single Output (SISO) antenna technology to a more promising Multiple Input Multiple Output (MIMO) antenna technology. On the other hand, Orthogonal Frequency Division Multiplexing (OFDM) technique has emerged as a very popular multi-carrier modulation technique...
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