Parametric Estimation of Doppler Spectral Moments: An Alternative Ground Clutter Rejection Technique

AbstractWe review cubic phase codes for mitigating ambiguities in range and velocity before introducing two specific codes. The two have periodicities of 5 and 7 samples for both the transmitted and the modulation code sequences. The short periods are suitable for generating codes of arbitrary length starting with about 15. We abbreviate the two codes with L5 and L7 and describe generation of the codes starting with kernels (i.e., minimum length sequences which repeat to generate the codes of desired lengths). The L5 modulation code produces 5 spectral replicas of the coded signal and the L7 produces 7. We apply the L7 code to a sinusoid and reveal spectra of the modulated signals from several ambiguous range intervals. Through simulation, we show application to weather-like signals and construct examples whereby two weather signals and ground clutter are overlaid. Using theory, we define the operating region of the codes in the signal parameter space. The region covers a wide range of overlaid returned powers and spectrum widths; it is obtained from simulations involving the L codes and the SZ(8/64) code. The technique is effective in distinguishing the returns from two trip regions separated by no more than L-2 ambiguous range intervals and reconstructing the corresponding spectral moments. The L5 and L7 codes protect from trip returns, up to 5th and 7th making them suitable for short wavelength (3 and 5 cm) radars as their PRTs must be relatively short to accommodate the expected spread of velocities in storms.

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Real-Time Spectral Moments Estimation and Ground Clutter Suppression for Precipitation Radar with High Resolution

IEICE Transactions on Communications ◽

10.1587/transcom.e92.b.578 ◽

2009 ◽

Vol E92-B (2) ◽

pp. 578-584 ◽

Cited By ~ 3

Author(s):

Eiichi YOSHIKAWA ◽

Tomoaki MEGA ◽

Takeshi MORIMOTO ◽

Tomoo USHIO ◽

Zen KAWASAKI

Keyword(s):

High Resolution ◽

Real Time ◽

Clutter Suppression ◽

Precipitation Radar ◽

Spectral Moments ◽

Ground Clutter

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Performance Analysis on Terrain-Adaptive Clutter Map Algorithm for Ground Clutter Rejection of Weather Radar

The Journal of Korean Institute of Electromagnetic Engineering and Science ◽

10.5515/kjkiees.2014.25.12.1292 ◽

2014 ◽

Vol 25 (12) ◽

pp. 1292-1299

Author(s):

Hye-Ri Kim ◽

Jung-Soo Jung ◽

Young-Kil Kwag ◽

Ji-Won Kim ◽

Ji-Hyeon Kim ◽

...

Keyword(s):

Performance Analysis ◽

Weather Radar ◽

Map Algorithm ◽

Ground Clutter ◽

Clutter Rejection

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Stochastic Maximum Likelihood (SML) parametric estimation of overlapped Doppler echoes

Annales Geophysicae ◽

10.5194/angeo-22-3983-2004 ◽

2004 ◽

Vol 22 (11) ◽

pp. 3983-3993 ◽

Cited By ~ 4

Author(s):

E. Boyer ◽

M. Petitdidier ◽

P. Larzabal

Keyword(s):

Time Series ◽

Puerto Rico ◽

Maximum Likelihood ◽

Data Processing ◽

Covariance Matrix ◽

Radar Data ◽

Parametric Estimation ◽

Actual Data ◽

Spectral Moments ◽

Parameters Of Interest

Abstract. This paper investigates the area of overlapped echo data processing. In such cases, classical methods, such as Fourier-like techniques or pulse pair methods, fail to estimate the first three spectral moments of the echoes because of their lack of resolution. A promising method, based on a modelization of the covariance matrix of the time series and on a Stochastic Maximum Likelihood (SML) estimation of the parameters of interest, has been recently introduced in literature. This method has been tested on simulations and on few spectra from actual data but no exhaustive investigation of the SML algorithm has been conducted on actual data: this paper fills this gap. The radar data came from the thunderstorm campaign that took place at the National Astronomy and Ionospheric Center (NAIC) in Arecibo, Puerto Rico, in 1998.

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Rainfall estimation and ground clutter rejection with dual polarization weather radar

Advances in Geosciences ◽

10.5194/adgeo-7-127-2006 ◽

2006 ◽

Vol 7 ◽

pp. 127-130 ◽

Cited By ~ 9

Author(s):

F. Lombardo ◽

F. Napolitano ◽

F. Russo ◽

G. Scialanga ◽

L. Baldini ◽

...

Keyword(s):

Doppler Radar ◽

Weather Radar ◽

Radar Rainfall ◽

Radar Meteorology ◽

Ground Clutter ◽

Clutter Rejection ◽

Atmospheric Remote Sensing ◽

Single Polarization ◽

Differential Reflectivity ◽

The City

Abstract. Conventional radars, used for atmospheric remote sensing, usually operate at a single polarization and frequency to estimate storm parameters such as rainfallrate and water content. Because of the high variability of the drop size distribution conventional radars do not succeed in obtaining detailed information because they just use horizontal reflectivity. The potentiality of the dual-polarized weather radar is investigated, in order to reject the ground-clutter, using differential reflectivity. In this light, a radar meteorology campaign was conducted over the city of Rome (Italy), collecting measurements by the polarimetric Doppler radar Polar 55C and by a raingauge network. The goodness of the results is tested by comparison of radar rainfall estimates with raingauges rainfall measurements.

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