Colloquium Summary: 2
11/29/2007
Advances in Cognitive Radio Networks
Douglas C. Sicker
The following are the bullet points from his talk:
- His research interests lie at the intersection of technology and policy.
- He talked about his current researches.
- He first presented the radio spectrum allocation.
- The band appears to be rather crowded. It is allocated but not always used; usage varies across band, time and location.
- So, we need a cognitive radio so that we can utilize spectrum more efficiently.
- He used software defined radios to sense the environment and learn how to adapt.
- What makes cognitive radio networks hard: interference avoidance, detection, computational complexity and security.
- Problem: Interference; Goal: System dynamically adapts to maintain performance goals in presence of interference.
- He varied a lot of parameters to achieve this goal.
- He worked on both simulation and implementation.
- He conducted a measurement and did multivariate analysis to understand the interactions.
- He used multifactor/knobs to improve the bit loss.
- Basic statistical methods and experimentally informed algorithm design provide a useful mechanism for adapting a radio.
- He also mentioned the security issues in his system.