Spectrum Sensing System Design Using RF Front-End Processing

Mitigating RF Front-End Nonlinearity of Sensor Nodes to Enhance Spectrum Sensing

The cognitive radio wireless sensor network (CR-WSN) has gained worldwide attention in recent years for its potential applications. Reliable spectrum sensing is the premise for opportunistic access to sensor nodes. However, as a result of the radio frequency (RF) front-end nonlinearity of sensor nodes, distortion products can easily degrade the spectrum sensing performance by causing false alar...

Simplifying RF front-end design in multiband handsets

R uthless competition in the handset market continues to drive manufacturers to search for new opportunities to drive down cost, printed circuit board (PCB) area and power consumption. Simultaneously, the rollout of third-generation (3G) networks has opened the door to a variety of new multimedia and data-based applications, from wireless Internet access and mobile video to text messaging and m...

Integrated Active Antenna Approach for Rf Front-end Design

Kevin M. K. H. Leong Department of Electrical Engineering, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA Ji-Yong Park Department of Electrical Engineering, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA Tatsuo Itoh Department of Electrical Engineering, University of California, Los Angeles, 405 Hilgard Avenue, Los An...

RF front-end CMOS design for build-in-self-test

Rf Front-end Design with Copper Passive Components

In this paper we evaluate the impact of copper passive components on RF circuit performance. A fully-differential RF Front-end is used as a test vehicle to compare the UMC 0.18 micron copper process with a traditional 0.25 micron aluminium process. The RF Front-end contains a balun and a low noise amplifier (LNA) that are designed with spiral inductors and capacitors. Spiral inductor Q values r...