linear frequency modulated signals
Non Linear Frequency Modulated Nested Barker Codes for Increasing Range Resolution
... binary signals for lower peak sidelobe level and low integrated ...are modulated by LFM and NLFM wave forms forimproving inPSLR and ISLR compared to the Barker ...are modulated by NLFM codes, the ...
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Harmonic Cancellation in Switched Mode Linear Frequency Modulated (LFM) Excitation of Ultrasound Arrays
... LFM signals of two, three, five and nine levels were generated using the University of Leeds, Ultrasound Array Research Platform (UARP) ...excitation signals were captured with a LeCroy Waverunner 64Xi ...
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1. Sidelobe reduction using frequency modulated pulse compression techniques in radar
... of frequency modulated pulse compression technique in which sweep rate is not restricted to constant as compared to the ...LFM signals with distinct sweep rates. The frequency of each stage is ...
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A Study of AM and FM Signal Reception of Time Modulated Linear Antenna Arrays
... and frequency modula- tion (FM) signal transmission of time modulated linear arrays (TMLA) is studied in this ...time modulated by RF switches, generating many side- band signals at ...
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Performance Evaluation of Various Signal Processing Techniques in a Tracking Radar
... the signals like burst signal, linear frequency modulated (LFM) signals are used for the determination of radar resolution and also these waveforms are implemented in popular codes like ...
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On Doppler Mismatch of Linear Frequency Modulated Waveforms in Active Sonar Applications
... the frequency or the amplitude of the transmitted waveform and coding the waveform with a pseudo random sequence will result in an increased time- bandwidth ...use frequency modulated signals. ...
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Comparison of single- and double-sided pulse width modulated signals with non-linear predistortion
... Spectrum analyser screen shots obtained from the test system operating in the absence and presence of a non-linear predis- tortion device for a double-sided PWM conversion are de- picted in Fig. 9 for an input ...
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Pulse Compression of Linear Frequency Modulation Signals in Presence of Phase Truncation
... generate linear frequency modulated (LFM) signal, and accomplishes pulse compression based on ...LFM signals generated by DDS are analyzed ...
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The Effect of Amplitude Modulation on Subharmonic Imaging with Chirp Excitation
... duration. Linear frequency modulated (LFM) and nonlinear frequency modulated (NLFM) chirp excitations allow independent control over the signal bandwidth and duration, therefore in this ...
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Compressive sampling of swallowing accelerometry signals using time-frequency dictionaries based on modulated discrete prolate spheroidal sequences
... input signals, embedded in a high-dimensional space, into signals that lie in a space of significantly smal- ler dimensions ...i.e., signals that can be represented by significant K coefficients over ...
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Time-Frequency Signal Synthesis and Its Application in Multimedia Watermark Detection
... messages modulated as linear chirp signals from the TF plane by signal synthesis method using polynomial- phase ...instantaneous frequency (IF) from the TF plane and which in turn, de- pends ...
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Survey on Spectrum Sensing For Digital Primary Signals in Cognitive Radio Using Bayesian Approach
... primary signals are ...primary signals, however, it does not make full use of the characteristics of the modulated ...primary signals, which makes it infeasible for practical ...digitally ...
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A Sub-Nyquist Sampling Digital Receiver System Based on Array Compression
... The compression matrix method was proposed to reduce the numbers of branches behind the antennas in [17]. This method uses a complex compression matrix Ψ ∈ C M×L at the antenna output, where L is the number of antennas, ...
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Superharmonic imaging with chirp coded excitation: Filtering spectrally overlapped harmonics
... Contrast-enhanced ultrasound imaging is another modality that can benefit from the use of higher-order harmonics. Bouakaz et al. demonstrated that the contrast-to-tissue ratio (CTR) increases as a function of harmonic ...
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Various Approaches of Recognition of Digitally Modulated Signals
... The recognition algorithms are divided into two major groups maximum likelihood approach MLA and pattern recognition approach PRA.Aim of this paper to describe different techniques of mo[r] ...
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Modified EMD with double density wavelet based machinery abnormality detection
... The vibration signal of roller is bearing a typically non-stationary process signal, which is the direct information source for rotating mechanical equipment running status and fault diagnosis in electro mechanical ...
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DU Syllabus _EEE (NEW).pdf
... Costs and Management Accounting: Cost concept and classification. Segregation and mixed cost . Overhead cost : meaning and classification, allocation of overhead cost, overhead recovery method. Job order costing: ...
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PAPR Analysis in OFDM Systems Using PTS Reduction Technique
... sub-blocks, representing certain portion of the actual information. Then the sub-blocks are passed on to IFFT and multiplied by a corresponding phase value and then added up to get the output signal whose PAPR will be ...
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Pulse Compression with Gaussian Weighted Chirp Modulated Excitation for Infrared Thermal Wave Imaging
... the linear frequency modulated incident heat flux to achieve better pulse compression ...conventional frequency modulated thermal wave imaging ...
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Frequency modulated free electron laser
... Fig. 3. 3D simulation of a FM-FEL operating in the X-ray. a) Schematic of the undulator line using linearly tapered wiggler modules to periodically modulate the FEL resonant frequency. b) Current profile of the ...
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