When to quit for a new job: Quickest detection of spectrum opportunities in multiple channels

摘要: We consider quickest detection of idle/off periods in multiple on-off processes. show that this problem presents a fresh twist to the classic signal processing change considers only one stochastic process. In particular, we demonstrate key processes is abandon current process when its state unlikely near future (as indicated by measurements obtained so far) and seek opportunities new This arises spectrum opportunity cognitive radio networks where secondary user searches for idle channels spectrum. A Bayesian formulation with geometrically distributed busy times within decision-theoretic framework. Based on structure resulting sequentially decision problem, propose low-complexity threshold policy channel switching superior performance over single-channel approach.