A reconfigurable RF front-end receiver for autonomous spectrum sensing cognitive radios
Ali Ramadan, Joseph Costantine, Y. Tawk, Karim Youssef Kabalan, Christos George Christodoulou · 2016
In this paper, a reconfigurable cognitive radio receiver for autonomous spectrum sensing is presented. A reconfigurable antenna, low-noise amplifier, reconfigurable bandpass filter, single-ended balanced mixer, voltage-controlled oscillator (VCO), and variable gain amplifier (VGA) build up the chain of the proposed receiver. This receiver targets the WLAN IEEE 802.11WLAN IEEE 802.11 g commercial wireless standard. The receiver performance is demonstrated with a 20-MHz down-converted signal at its output.