Event Details
Queueing analysis for slotted secondary transmission with adaptive modulation and coding under spectrum sensing imperfection
Presenter: Wen-Jing Wang
Supervisor:
Date: Fri, November 23, 2018
Time: 14:00:00 - 15:00:00
Place: EOW 230
ABSTRACT
Abstract
In cognitive radio communication system, unlicensed secondary user (SU) can opportunistically transmit over underutilized primary user’s (PU) spectrum. With interweave implementation, SU performs spectrum sensing on the target frequency band to explore transmission opportunity. Sensing errors can greatly affect the performance of secondary transmission. In this seminar, we propose a seven-state discrete-time Markov model to characterize slotted secondary transmission process with imperfect spectrum sensing. A two-dimensional Markov model is also developed to study the queueing performance of slotted secondary transmission with adaptive modulation and coding. We show that false alarm has significant effect on the secondary throughput, whereas miss detection only notably reduces the secondary throughput when the traffic intensity is low.