Advanced signal processing scheme for GNSS receivers under ionospheric scintillation

2012 ◽  
Author(s):  
J. H. Won ◽  
B. Eissfeller ◽  
T. Pany ◽  
J. Winkel
Keyword(s):  
Signal Processing ◽  
Ionospheric Scintillation ◽  
Processing Scheme ◽  
Gnss Receivers

Low coherence, interferometric fibre optic vibrometer using novel optical signal processing scheme

1991 ◽  
Vol 27 (18) ◽  
pp. 1658 ◽  
Author(s):  
K. Weir ◽  
W.J.O. Boyle ◽  
A.W. Palmer ◽  
K.T.V. Grattan ◽  
B.T. Meggitt
Keyword(s):  
Signal Processing ◽  
Optical Signal Processing ◽  
Optical Signal ◽  
Fibre Optic ◽  
Processing Scheme ◽  
Low Coherence

scholarly journals Validation of a new signal processing scheme for the MST radar at Aberystwyth

2008 ◽  
Vol 26 (11) ◽  
pp. 3253-3268 ◽  
Author(s):  
D. A. Hooper ◽  
J. Nash ◽  
T. Oakley ◽  
M. Turp
Keyword(s):  
Signal Processing ◽  
Measurement Error ◽  
Gravity Wave ◽  
Wave Activity ◽  
Horizontal Wind ◽  
Time Averaging ◽  
Random Measurement Error ◽  
Processing Scheme ◽  
Random Measurement ◽  
Short Period

Abstract. This paper describes a new signal processing scheme for the 46.5 MHz Doppler Beam Swinging wind-profiling radar at Aberystwyth, in the UK. Although the techniques used are similar to those already described in literature – i.e. the identification of multiple signal components within each spectrum and the use of radial- and time-continuity algorithms for quality-control purposes – it is shown that they must be adapted for the specific meteorological environment above Aberystwyth. In particular they need to take into account the three primary causes of unwanted signals: ground clutter, interference, and Rayleigh scatter from hydrometeors under stratiform precipitation conditions. Attention is also paid to the fact that short-period gravity-wave activity can lead to an invalidation of the fundamental assumption of the wind field remaining stationary over the temporal and spatial scales encompassed by a cycle of observation. Methods of identifying and accounting for such conditions are described. The random measurement error associated with horizontal wind components is estimated to be 3.0–4.0 m s−1 for single cycle data. This reduces to 2.0–3.0 m s−1 for data averaged over 30 min. The random measurement error associated with vertical wind components is estimated to be 0.2–0.3 m s−1. This cannot be reduced by time-averaging as significant natural variability is expected over intervals of just a few minutes under conditions of short-period gravity-wave activity.

scholarly journals Noisy Reverberation Suppression Using AdaBoost Based EMD in Underwater Scenario

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Kusma Kumari Cheepurupalli ◽  
Raja Rajeswari Konduri
Keyword(s):  
Signal Processing ◽  
Acoustic Signal ◽  
Probability Of Detection ◽  
Chirp Signal ◽  
Processing Scheme ◽  
Adaptive Boosting ◽  
Mode Decomposition ◽  
Crucial Problem ◽  
Filtering Technique ◽  
Simulation Results

Reverberation suppression is a crucial problem in sonar communications. If the acoustic signal is radiated in the water as medium then the degradation is caused due to the reflection coming from surface, bottom, and volume of water. This paper presents a novel signal processing scheme that offers an improved solution in reducing the effect of interference caused due to reverberation. It is based on the combination of empirical mode decomposition (EMD) and adaptive boosting (AdaBoost) techniques. AdaBoost based EMD filtering technique is used for reverberation corrupted chirp signal to decrease the noisy components present in the received signal. An improvement in the probability of detection is achieved using the proposed algorithm. The simulation results are obtained for various reverberation times at various SNR levels.

scholarly journals On signal processing scheme based on network coding in relay-assisted D2D systems

2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Bo Li ◽  
Qiuming Zhao ◽  
Ruofei Ma ◽  
Hongjuan Yang ◽  
Gongliang Liu ◽  
...  
Keyword(s):  
Signal Processing ◽  
Network Coding ◽  
Processing Scheme

scholarly journals Joint Time-Frequency Signal Processing Scheme in Forward Scattering Radar with a Rotational Transmitter

2016 ◽  
Vol 8 (12) ◽  
pp. 1028 ◽  
Author(s):  
Raja Raja Abdullah ◽  
Azizi Mohd Ali ◽  
Mohd Rasid ◽  
Nur Abdul Rashid ◽  
Asem Ahmad Salah ◽  
...  
Keyword(s):  
Signal Processing ◽  
Forward Scattering ◽  
Frequency Signal ◽  
Processing Scheme ◽  
Time Frequency
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