| 摘要 |
#CMT# #/CMT# The method involves receiving an input spectrum with a set of channels, and performing a coarse scan of the channels to determine occupied candidate channels and vacant candidate channels, where the scan is related to a resolution bandwidth and a frequency sweep increment. A fine scan of the channels is performed to determine actually occupied channels and actually vacant channels, where the fine scan is related to another resolution bandwidth and another increment. An indication of the actually occupied and vacant channels is stored. #CMT# : #/CMT# An independent claim is also included for a spectrum-sensing system comprising an input radio frequency. #CMT#USE : #/CMT# Spectrum-sensing method for a cognitive radio for exploiting limited spectrum resource via a wireless network e.g. cellular network, wireless personal area network (PAN), wireless local area network (LAN) and wireless metro area network (MAN). #CMT#ADVANTAGE : #/CMT# The method minimizes the time consumed to detect or sense a spectrum over wideband frequency span, thus improving an overall spectral efficiency of a spectrum-sensing system, and hence locating unoccupied spectrum segments in an efficient and accurate manner. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a flow diagram of a fine scanning procedure and a final decision procedure. |
