doppler frequency
A Robust Joint Estimation Method of Time Delay and Doppler Frequency Shift
... Abstract. In this paper, a novel concept, the Sigmoid transform based cyclic correlation, is proposed and a relative estimator named the Sigmoid transform based cyclic cross-ambiguity function is also derived to handle ...
6
Index Terms - Doppler frequency, pendulum, radar, zelscope
... radars, Doppler radar detects an object by sending out a series of pulses of electromagnetic radiation in the radio or microwave region of the ...research, Doppler radar is used to find out the time period ...
6
Improving Long PN-Code Acquisition in the Presence of Doppler Frequency Shifts
... Long PN code acquisition methods mainly subside in two categories, searching in time or frequency domain for code phase offset and residual frequency. Although time domain approaches lost their ...
9
Local Sparse Reconstructions of Doppler Frequency using Chirp Atoms
... local frequency contents, which are referred to the center point of the sliding window, similar to the generation of ...accurate frequency representations of the underlying signal will be ...time- ...
6
Estimation of Wind Speed of MST Radar Signal Using Wavelets
... Repetition Frequency (PRF), the rate at which the samples are ...possible Doppler frequency that can be detected is half the ...maximum frequency detectable is f N = PRF/2 (NCOH) = 1/2 (NCOH) ...
15
Instantaneous Frequency Estimation Methods of Micro-Doppler Signal
... the frequency domain, as well as unable to locate the micro-Doppler frequency ...micro Doppler frequency distribution curve, but only the case of single target with a single micro- ...
10
System Simulation of RF Front End Transceiver for Frequency Modulated Continuous Wave Radar
... a Doppler frequency shift will be superimposed on the FM range beat note and an erroneous range measurement ...The Doppler frequency shift causes the frequency-time plot of the echo ...
8
Design and Implementation of Wireless Channel Simulator Based on Shaping Filter
... f is the maximum Doppler frequency shift, 2 is the variance. Construction shaping filter according to the formula (11), use ISE12.1 to implement VHDL code comprehensive. Through the Modelsim software to ...
5
An Enhanced Carrier Acquisition Algorithm for Low SNR and High Dynamic Signal
... large Doppler frequency shift and frequency change rate so it makes to create problem in signal reception and ...carrier frequency acquisition with high dynamic and low SNR signal is ...signal ...
8
A Human Gait Classification Method Based on Radar Doppler Spectrograms
... the frequency shift of the wave radiated or scattered by the object, known as the Doppler e ff ...induces frequency modulation on the returned signal and generates sidebands about the Doppler ...
12
A Novel Non-Homogeneous STAP Algorithm for Target-Like Signal Elimination Based on Sparse Reconstruction
... Airborne radar has been applied in ground motive target detection extensively. However, the relative speed and extending Doppler frequency of the clutter caused by the platform motion lead to seriously ...
11
An Improved Channel Estimation Algorithm Based on Cubic Convolution Interpolation for LOWPM System
... is Doppler frequency shift existing in multipath Rayleigh fading channel, the performance of system deteriorates and bit error rate has been in a high ...that Doppler frequency shift is ...
8
Implementation of acquisition & tracking algorithms of spread spectrum signals in high dynamic scenario
... 225Hz doppler, we can see in the figure-9a that correlation peak is in doppler bin 0, means acquired doppler frequency is 0 Hz, so tracking loop will trace the frequency up to -211Hz ...
6
Ka-band Microwave Frequency Comb Doppler Reflectometer System for the Large Helical Device
... the Doppler shifted frequency is decreasing toward the negative frequency direction during ...the Doppler frequency is increasingly ...These frequency shifts correspond with the ...
6
Doppler Reduction Effect on the Performance of IEEE 802.11a Based on Sub-Frequency Band Algorithm
... achieves frequency synchronization to avoid ICI and estimates symbol timing to determine the position of the FFT ...maximum Doppler- frequency estimation was proposed for Single-carrier systems, ...
7
Moving Target Indication Radar
... Moving targets may be distinguished from stationary targets by observing the video output on an A-scope (amplitude vs. range). A single sweep on an A- scope might appear as in Fig.2. This sweep slows several fixed ...
5
Extracranial Carotid Atherosclerosis and Acute Ischemic Stroke in a Tertiary Hospital in Burkina Faso
... high frequency of theses is due to its association with hypertension, diabetes mellitus and ...on Doppler ultrasound ...poor frequency of patients who had initially high level of HDL C ...
13
Acousto optic superlattice modulator using Fibre Bragg grating
... bandwidth of 0.7nm, a Bragg wavelength of 1526.5nm, and a coupling constant 6 = 1.3/mm. A piezoelectric transducer, bonded to a silica horn and driven by a rf signal generator, was used as the source of acoustic waves. ...
5
Doppler spectra of airborne ultrasound forward scattered by the rough surface of open channel turbulent water flows
... surface frequency spectrum, espe- cially when the flow mean surface velocity is of similar order of magnitude of the phase and group velocities of gravity- capillary ...
14
Venus Express radio occultation observed by PRIDE
... as frequency reference, conducted all radio occultation experiments in a one-way mode, transmitting coherent dual-frequency carrier downlinks at X-band ...
14