The scarceness of the radio spectrum leads to opportunistic spectrum access or cognitive radio. In this letter, we analyze the spectrum sensing threshold to improve reliability of opportunity detection in the spatial domain. We minimize the weighted sum of exposed- and hidden node probabilities, and derive the optimal spectrum sensing threshold as a closed form formula. We take the estimation error into account, which is parameterized into the sensing threshold. Our analytic results will provide a fundamental framework for opportunistic spectrum access networks or wireless LANs.
Bibliographical noteFunding Information:
This research was supported by the International Research & Development Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST) of Korea (grant number: K20901001406-09B1300-03110, FY 2010).
All Science Journal Classification (ASJC) codes
- Modelling and Simulation
- Computer Science Applications
- Electrical and Electronic Engineering