![Scientific and Technical Journal of Information Technologies, Mechanics and Optics](/images/mag-ntv.png)
FREQUENCY DETERMINATION OF PULSE SIGNAL WITH CONSTANT BEAT BY DINT OF RECURRENT USAGE OF FOURIER TRANSFORM
![Scientific and Technical Journal of Information Technologies, Mechanics and Optics](/images/mag-ntv.png)
Annotation
The paper proposes an algorithm for frequency estimation of a pulse signal with constant beat under significant distortion conditions with the use of spectral analysis methods. The sequential processing of the signal based on the recurrent usage of discrete Fourier transform is shown. The initial pulse signal is represented as a fragment of the Dirac comb. Its Fourier spectrum also contains a fragment of the Dirac comb. To reduce the effect of leakage due to the application of Fourier transform to the finite sequence, a convolution of the signal with a weight window is used. To increase the signal-to-noise ratio and reduce the side lobe level, the spectrum of the initial signal is taken as the original for Fourier transform with an increased number of spectral lines. The necessity of recurrent transformation usage is brought about by the noise of the initial signal and the resulting spectrum after the first application of Fourier transform. In comparison with a single application of the transformation, this approach provides an opportunity to recognize a useful signal both against the background of Gaussian and aperiodic impulse noise, and against the background of signals containing such noise in the Fourier spectrum. We give a method for checking the local maxima of the amplitudes of the obtained discrete Fourier transform for periodicity. The frequency of a pulse signal with constant beat is determined by the element index with the largest number of fulfillment of the periodicity condition.
Keywords
Постоянный URL
Articles in current issue
- AUTOMATIC OBJECT CLASSIFICATION ACCORDING TO 3D-LIDAR DATA BASED ON SINGLE-PHOTON COUNTING TECHNOLOGY
- RESEARCH OF ORAL MUCOSA REGENERATION AFTER FRACTIONAL TREATMENT BY DIODE LASER WITH 980 NM WAVELENGTH
- RESEARCH OF HUMAN BLOOD OPTICAL PROPERTIES WITH CONCENTRATION CHANGES OF BLOOD COMPONENTS IN TERAHERTZ FREQUENCY RANGE
- STUDY OF OPTICAL PROPERTIES AND SPECTRAL CHARACTERISTICS OF BRAIN GLIOBLASTOMA AND LUNG ADENOCARCINOMA
- FORMATION OF INSULATING BARRIERS IN SILICA POROUS FILMS BY CO2 LASER WRITING
SPECTRAL CHARACTERISTICS STUDY OF PHASE-SHIFTED FIBER BRAGG GRATINGS UNDER PRESSURE APPLIED PERPENDICULAR TO FIBER AXIS
- POSSIBILITY OF LOW ALTITUDES MEASUREMENT ABOVE SEA SURFACE UNDER CONDITIONS OF HAZE AND FOG
- METHOD OF GAS-DISCHAGE VISUALIZATION FOR DETERMINATION OF PATHOLOGIES OF BIOLOGICAL TISSUES
- ALGORITHM OF ADAPTIVE OUTPUT CONTROL OF LINEAR SYSTEM WITH IMPROVED PARAMETRIC CONVERGENCE
- CONTROL OF THE MECHATRONIC SYSTEM WITH FLEXIBLE ROTATING LINK: THEORY AND EXPERIMENT
- STRUCTURE RESEARCH OF FILM COMPOSITIONS BASED ON CHITOSAN/ POLYHYDROXYBUTYRATE BLEND BY INFRARED AND X-RAY FLUORESCENCE SPECTROSCOPY
- MODELING AND ALGORITHMIC PROVISION OF DYNAMIC INDENTIATION PROCESS
- TESTING AND DEBUGGING OF EMBEDDED COMPUTING SYSTEMS BASED ON LEVEL MODELS
- PATTERN RECOGNITION METHODS IN CASE OF VISUAL INFORMATION SEMANTIC INTEGRITY VIOLATIONS
- ANALYSIS OF INFORMATION INTERACTION SECURITY WITHIN GROUP OF UNMANNED AERIAL VEHICLES
- COMPUTATIONALLY EFFECTIVE NUMERICAL SIMULATION METHOD FOR DIFFRACTION-BLURRED IMAGES OF OBJECTS WITH PIECEWISE-LINEAR EDGE CONTOUR
- COVERT CHANNEL TECHNIQUE BASED ON STREAMING PROTOCOL
- METHODS OF LIFE CYCLE INCREASE FOR THE INTERNET OF THINGS
- SPEECH ACQUISITION IN NOISY ENVIRONMENTS USING DUAL MICROPHONE ARRAYS
- INFORMATION ON UTILIZATION OF DATA CENTER RESOURCES WITH MESSAGE BROKER IMPLEMENTATION
- FEATURES OF NON-LOCAL SEMANTIC LINKS IN RUSSIAN TEXTS
- DETERMINATION OF OVERLAPPING REGION FOR ELECTRONIC MODULE IMAGES
- RESEARCH OF EMOJI ROLE IN ONLINE COMMUNITY
- COMPARISON OF APPROACHES TO UNKNOWN PARAMETERS IDENTIFICATION IN GYRO DRIFT MODEL
- PSEUDORANDOM NUMBER GENERATOR ON CELLULAR AUTOMATA
- RESULTS OF EXPERIMENTAL RESEARCH AND SIMULATION OF MULTI-CORE FIBER WAVEGUIDE WITH FIBER BRAGG GRATINGS ARRAY