Data quality and ambiguity resolution in a doppler radar system
AssigneeUniversity Corporation for Atmospheric Research
InventorsRichard H. Cornelius, Richard W. Gagnon, Jules F. Pratte
Life of this patent
Estimating the term…
Abstract
The pulsed Doppler weather radar system reduces ambiguities in measured parameters by staggering at least one pulse of each frame of n pulses transmitted by the radar system. The staggered pulse creates an isolated pulse doublet pair to provide three or more independent and auxiliary Doppler parameter estimates. The parameter estimates are combined optimally in a neuromorphic processor matched to the phenomena of interest, particularly capitalizing on multiparameter volumetric correlations to improve data quality.
Claims40
In a Doppler radar system that transmits a train of pulses of radio frequency energy and receives return echo signals from objects in response thereto, apparatus for reducing ambiguity in said return echo signals comprising:
- means for generating a series of output pulse signals at a predetermined pulse repetition frequency;
- means for transmitting a pulse of radio frequency energy in response to each of said series of output pulse signals;
- and
- means for controllably shifting in time j pulse signals of selected sequences of n output pulse signals where n is a positive integer greater than two and j is a positive integer greater than 0 and less than n/2, to create j pulse doublet pairs, a pulse of each said pulse doublet pair having a frequency that differs from said predetermined pulse repetition frequency o enable said Doppler radar system to produce estimates based upon more than one pulse repetition frequency from said return echo signals.
In a Doppler radar system that transmits a train of pulses of radio frequency energy and receives return echo signals from objects in response thereto, a method for reducing ambiguity in said return echo signals comprising the steps of:
- generating a series of output pulse signals at a predetermined pulse repetition frequency;
- transmitting a pulse of radio frequency energy in response to each of said series of output pulse signals;
- and
- controllably shifting in time j pulse signals of selected sequences of n output pulse signals, where n is a positive integer greater than two and j is a positive integer greater than 0 and less than n/2, to create j pulse doublet pairs, a pulse of each said pulse doublet pair having a frequency that differs from said predetermined pulse repetition frequency to enable said Doppler radar system to produce estimates based upon more than one pulse repetition frequency from said return echo signals.
Dependencies are inferred from the claim text.