[CPCC] TALK: Cognitive Radio Tue May 8 12 PM

[Ender Ayanoglu]

                                       TALK

Cognitive Radio - The Next-Generation Radio Technology to Alleviate the
                             Spectrum Scarcity Problem

                                    Duo Zhang

                               May 8, 2007, Tuesday
                                      12-1 PM

                              Med Surge II Building
                                     Room 316

                                     Abstract

    Radio frequency (RF) spectrum is an increasingly valuable resource
tightly regulated by governments. However, current radio technologies cause
severe spectrum under-utilization; the average spectrum occupancy from 30MHz
to 3GHz measured in New York city was only 13%. Meanwhile, the spectrum
scarcity is another challenging problem. For example, only in the frequency
range of ISM 2.4GHz, Bluetooth devices, cordless phones, WiFi 802.11b/g/n,
and microwave ovens, have to coexist.
    Such a huge imbalance between spectrum scarcity and spectrum
under-utilization is especially lagging today's high-speed wireless
networking. To alleviate the imbalance, cognitive radios (CR) have emerged
as attractive candidates that enhance radio spectrum-utilization efficiency
on both licensed bands and license-free bands.
    In the presentation,  the concept of cognitive radio and the key
components of the cognitive radio will be introduced. I will also show
challenges, examples of solutions such as EKF (extended Kalman filter) based
adaptive games, capacity comparison of narrowband and wideband cognitive
systems, as well as open problems for cognitive radios.

Host: Fan-Gang Zeng, Medical School