Comparison between the Ccd Czt and the Digital Fft
نویسندگان
چکیده
The CCD analog transversal filter Is a tremendously cost-effective component In terms of its simplicity compared to equivalent diqltal hardware. In view of this, the chirp z-transform (CZT) algorithm for performing spectral analysis is ideally suited to ccn implementation because, in this algorithm, the bulk of the computation Is performed in a transversal filter. The CCD CZT has some performance 1 Imitations relative to the diqltal fast Fourier transform (FFT), and for this reason, it Is not appl !cable to all military signal processing systems. However, for those applications which fall within the CCD performance capabilities, the CZT offers significant potential cost saving over the dlqltal FFT. The performance of the CCO CZT is evaluated and compared with the digital FFT. A discussion Is given of selected military applications where the CCD CZT can be used to advantage.
منابع مشابه
Using WPT as a New Method Instead of FFT for Improving the Performance of OFDM Modulation
Orthogonal frequency division multiplexing (OFDM) is used in order to provide immunity against very hostile multipath channels in many modern communication systems.. The OFDM technique divides the total available frequency bandwidth into several narrow bands. In conventional OFDM, FFT algorithm is used to provide orthogonal subcarriers. Intersymbol interference (ISI) and intercarrier interferen...
متن کاملThe perceptibility curve test applied to CCD and two methods of digitization of dental film-based radiographs
Objectives: Several methods of image acquisition are accessible in dentistry. There is no overall acceptable method for image digitization so all different types of images can be comparable. The objective of this study was to compare the diagnostic accuracy of different methods of image digitization. Methods: This accuracy diagnostic test study used perceptibility curve test which first intr...
متن کاملQuality comparison of direct digital panoramic radiography and computed radiography panoramic
BACKGROUND AND AIM: Digital panoramic X-ray images can be captured using photostimulable phosphors or solid-state detectors (i.e. charge-coupled devices and Flat-Panels). The first category is defined as computed radiography (CR) or semi-direct radiography. The second technology that uses solid-state detectors is known as direct digital radiography (DDR). Both of these technologies have their o...
متن کاملComparison Between Different Methods of Feature Extraction in BCI Systems Based on SSVEP
There are different feature extraction methods in brain-computer interfaces (BCI) based on Steady-State Visually Evoked Potentials (SSVEP) systems. This paper presents a comparison of five methods for stimulation frequency detection in SSVEP-based BCI systems. The techniques are based on Power Spectrum Density Analysis (PSDA), Fast Fourier Transform (FFT), Hilbert- Huang Transform (H...
متن کاملOptimization of an ultra-high-resolution rectangular pixelated parallel-hole collimator with a CZT pixelated semiconductor detector for HiRe-SPECT system
Introduction: In nuclear medicine, the use of a pixelated semiconductor detector such as CZT is an of growing interest for introducing new devices. Especially, the spatial resolution can be improved by using a pixelated parallel-hole collimator with equal holes and pixel sizes based on the pixelated detector. The purpose of this study was to compare the effect of pixelated and ...
متن کامل