Research Article
Implementation Issues of A Wideband Multi-Resolution Spectrum Sensing (MRSS) Technique for Cognitlve Radio (CR) Systems
@INPROCEEDINGS{10.1109/CROWNCOM.2006.363471, author={J. Park and Y. Hur and T.J. Song and K. Kim and J. Lee and K. Lim and C.-H. Lee and H. S. Kim and J. Laskar}, title={Implementation Issues of A Wideband Multi-Resolution Spectrum Sensing (MRSS) Technique for Cognitlve Radio (CR) Systems}, proceedings={1st International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2007}, month={5}, keywords={Chromium Cognitive radio Digital modulation Harmonic distortion Narrowband Nonlinear control systems Performance gain Phase modulation Voltage-controlled oscillators Wideband}, doi={10.1109/CROWNCOM.2006.363471} }- J. Park
Y. Hur
T.J. Song
K. Kim
J. Lee
K. Lim
C.-H. Lee
H. S. Kim
J. Laskar
Year: 2007
Implementation Issues of A Wideband Multi-Resolution Spectrum Sensing (MRSS) Technique for Cognitlve Radio (CR) Systems
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2006.363471
Abstract
Spectrum sensing is a key function for a cognitive radio (CR) system. An analog-based multi-resolution spectrum sensing (MRSS) technique was proposed as a flexible, low-power, high-speed spectrum-sensing solution. In this paper, implementation issues of the MRSS technique are investigated, and the corresponding practical specifications are suggested. First, nonlinear effects from a voltage-controlled oscillator (VCO) and multipliers are explored. System simulation results show that harmonic distortion components of VCO and wavelet-pulse power levels should be controlled to alleviate these nonlinear effects. Afterward, I/Q phase- and gain-mismatch effects ore addressed. Specifically, narrow-band signals are more sensitive to these gain and phase mismatches compared to broadband digital modulated signals. Overall, phase mismatch is more sensitive than gain mismatch on MRSS performance, showing a linear degradation of a detected power-level up to a 60-degree phase-mismatch
