DESIGN OF POWER SPECTRUM DENSITY MONITORING SYSTEM USING OPTIMAL SLIDING EXPONENTIAL WINDOW TECHNIQUE
Keywords:
Discrete Fourier Transform (DFT), Power Spectral Density (PSD), exponential window, sliding DFTAbstract
Under the restriction of the frequency usage license, there are limited radio frequency ranges thatcan be used. However, the cost and equipments for monitoring and detecting the violation of licensedfrequency bands can be expensive and complicated. Therefore, this paper proposes the design of PowerSpectral Monitoring System for monitoring and detecting the signal whose frequency exceeds theallowable range. The main focus for the design is to introduce the efficient power spectrum densitycomputation. To achieve that, we apply sliding DFT computation method which is faster thancalculating entire FFT or DFT. Also, we included exponential window, and compared the resultsbetween the two sliding DFT methods. The proposed Power Spectral Monitoring System has manyadvantages over the traditional system based on the usage of spectrum analyzer. This includes a lowercost in determining and detecting excess frequency ranges. In addition, the system uses softwareimplementation which is relatively cheaper and easier to reconfigure than hardware counterpart.The proposed system is also faster in term of processing speed because it uses modified and enhancedalgorithms to shorten the detection process.
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