A Two-Stage Sensing Technique for Dynamic Spectrum Access

—Dynamic spectrum access (DSA) is a promising approach for mitigating spectrum scarcity. Underlying DSA is the need for fast and reliable spectrum sensing over a potentially large band. In [4], the concept of two-stage sensing scheme was introduced. In this work, we develop models for performance analysis based on mean time to detect an idle channel. Simulation results show that two-stage sensing leads to faster detection than conventional single-stage random search. System-level issues such as the impact of bandwidth of coarse sensing block and sensing duration of energy detector on mean detection time are also explored.

• Type: Conference
• Year: 2008
• Where: ICC
• Authors: Ling Luo, Sumit Roy
• Keywords: Communications, ICC 2008, Sensing, Two-stage Sensing, Two-stage Sensing Scheme