Afrl-ry-wp-tp-2010-1162 Cross-layer Design in Wireless Cognitive Networks (postprint)

Afrl-ry-wp-tp-2010-1161 Cross-layer Based Approach for Primary Signal Detection in Wireless Cognitive Networks (preprint)

Cross-layer approach in cognitive wireless networks is proposed for efficient use of spectrum by detecting primary signals. The detection may be false detection of primary signal, missed detection of primary signal, or correct detection of primary signal. The quick and correct detection of primary signal will be helpful for utilization of the idle spectrum. In the current research, Su’s algorit...

Afrl-ry-wp-tp-2010-1148 Detecting Primary Signals for Efficient Utilization of Spectrum Using Q-learning (postprint)

The efficient utilization of underutilized spectrum is the main theme of current research. The cognitive radio with the help of Q-learning algorithm is used to detect the presence of primary signals and utilize the spectrum in the absence of primary signals. The proposed Q-learning algorithm model identifies previously known signals and learns to detect the signals which otherwise could not be ...

Afrl-pr-wp-tp-2006-259 Control of Penetration and Mixing of an Excited Supersonic Jet into a Supersonic Cross Stream (postprint)

AFRL-RY-WP-TP-2011-1006 3-dB BANDWIDTH ENHANCEMENT VIA THE GAIN- LEVER EFFECT IN QUANTUM-DOT LASERS (POSTPRINT)

We investigate the small-signal modulation response of two-section, gain-lever, quantum-dot semiconductor lasers. A three-polemodulation function is derived from a 3-D set of rate equations, and a 70% 3-dB bandwidth enhancement is computed and experimentally realized in an undoped quantum-dot gain-lever laser under extreme asymmetric-bias conditions. Finally, it is demonstrated that the 3-dB ba...

Afrl-rx-wp-tp-2008-4019 Estimating the Strength of Single-ended Dislocation Sources in Micron-sized Single Crystals (postprint)