Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/49107
Title: ON THE SENSING PERIOD FOR OPPORTUNISTIC SPECTRUM ACCESS
Authors: WANG ZHENG
Keywords: spectrum sensing; opportunistic spectrum access; cognitive radio
Issue Date: 14-Aug-2013
Source: WANG ZHENG (2013-08-14). ON THE SENSING PERIOD FOR OPPORTUNISTIC SPECTRUM ACCESS. ScholarBank@NUS Repository.
Abstract: Accurate spectrum sensing plays a key role in the opportunistic spectrum access model in the cognitive radio network. This thesis shows that it is insufficient to just consider the traditional sensing errors. We also need to model and analyze the type-II missed detection error which arises from the mismatch between secondary user¿s (SU) sensing period and primary user¿s (PU) ON/OFF activities. Four spectrum sensing performance metrics are identified, namely the probability of type-II missed detection error, probability of missed transmission opportunity, probability of successful transmission and probability of blocked access. The closed-form expressions for these metrics are derived under several PU spectrum activity models. This thesis then illustrates the trade-off relationship between aforementioned errors and network throughput. Lastly, this thesis looks into how to approximate the continuous PU ON/OFF process by a discrete model in the context of spectrum sensing without losing valuable information about the type-II missed detection error.
URI: http://scholarbank.nus.edu.sg/handle/10635/49107
Appears in Collections:Master's Theses (Open)

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