Abstract
In this paper we deal with the throughput of full-duplex cognitive communication radio which exploits unused band of primary user (PU) network. Classical cognitive radio uses half-duplex communication spectrum sensing to perform spectrum sensing and data transmission at different time intervals. It’s well-established fact that in half-duplex communication cognitive radio spectrum sensing time increases at low SNR which gives rise to lesser data transmission time for secondary user (SU) and hence results in less throughput for SU. It’s useful idea to do spectrum sensing and data transmission at the same time with two different antennas co-located on the SU transceiver. This shall not only guarantee high probability of detection of PU but also increased data transmission which means more throughput for SU. However, simultaneous sensing and data transmission has inherent problem of self-interference. One of the possible solution is to use polarisation discrimination in which sensing and data transmission antennas must use different polarisation. This is feasible if there is prior information about the polarisation of the signals emitted by the PUs. It shall be of special interest to assess throughput using analytical expressions for probability of detection P_D, probability of false alarm P_{FA} at various values of SNR for time-slotted cognitive radio which uses half-duplex spectrum sensing and non-time-slotted cognitive radio which uses full-duplex communication cognitive radio.
Highlights
Because of the influx of smartphone and due to digital dividend there has been increased trend for application that demand high data rates
It decreases with the increase in number of samples for which primary user (PU) is initially absent i.e from v 1⁄4 500 to v 1⁄4 1500
It increases with the increase in number of samples assigned to PU for which initially remains inactive
Summary
Because of the influx of smartphone and due to digital dividend there has been increased trend for application that demand high data rates. Due to digital dividend and shift in user pattern a lot of under-utilised spectrum is observed typically in VHF and UHF band of electromagnetic spectrum and such sparsely used bands are known as TV white spaces (TVWS). There are some new standards which involve cognitive radio principle few to mention are wireless metropolitan area network (WMAN) IEEE 802.22 for broadband applications in remote areas, wireless local area network (WLAN) standard known as IEEE 802.11af which uses master and slave architecture and notion of white space database, IEEE 802.15.4m an low data rate short range wireless personal area network (WPAN) system with cognitive radio and a host of other network types shall experience cognitive radio based transformation. A number of detectors has been considered for the implementation in CR transceivers for example energy detector [1, 2], matched filter detector [3, 4], Eigen-value based detector [5, 6], detectors involving cyclostationarity [7] and wavelet-based detection [8] etc
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
