SENSITIVITY ENHANCEMENT SYSTEM
First Claim
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1. A weather radar system comprising:
- a transmitter configured to transmit a first signal and a second signal into a region of interest;
a receiver configured to receive first echoes and second echoes scattered from the region of interest, wherein the first echoes correspond with the first transmitted signal and the second echoes correspond with the second transmitted signal; and
a computer system coupled at least with the receiver, wherein the computer system is configured to filter the second echoes based on information about either or both the first waveform and the first echoes.
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Abstract
Sensitivity is a critical aspect of weather radar systems. Such systems not only detect atmospheric patterns but often need to precisely measure weak precipitation echoes. Embodiments of the invention use pulse compression techniques to increase the sensitivity of weather radar systems. These techniques can include sending two waveforms into a region of interest, where the second waveform is designed based on knowledge about the first waveform. Such systems can enhance the sensitivity of weather radars about 10 dB.
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Citations
20 Claims
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1. A weather radar system comprising:
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a transmitter configured to transmit a first signal and a second signal into a region of interest; a receiver configured to receive first echoes and second echoes scattered from the region of interest, wherein the first echoes correspond with the first transmitted signal and the second echoes correspond with the second transmitted signal; and a computer system coupled at least with the receiver, wherein the computer system is configured to filter the second echoes based on information about either or both the first waveform and the first echoes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for increasing the sensitivity of a radar system, the method comprising:
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transmitting a first waveform into the atmosphere from a weather radar system; transmitting a second waveform, different from the first waveform, into the atmosphere from the weather radar system; receiving echoes from the atmosphere in response to the first waveform and the second waveform; and filtering echoes of the second waveform based on information about either or both the first waveform and the echoes from the first waveform. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method for designing waveforms for a dual-waveform weather radar system, the method comprising:
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determining the frequency and bandwidth of the first waveform and the second waveform; determining the duration of the first waveform and the second waveform; assign pulse codes to the first waveform; compute the range resolution of the first waveform; determine the bandwidth of the second waveform from the range resolution of the first waveform; and assign pulse codes to the second waveform. - View Dependent Claims (18, 19, 20)
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Specification