Radar system and method using pulse compression
First Claim
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1. A radar system including an antenna, the radar system having short range detection capability, the radar system comprising:
- a receiver coupled to the antenna for receiving a receive signal associated with a pulse compressed transmission signal;
a first matched filter configured to accumulate at least a portion of the receive signal for a particular range, the portion of the receive signal corresponding to less than a full pulse width of the pulse compressed transmission signal, wherein the matched filter is implemented using a first pulse decompression algorithm executed by a processor; and
a full matched filter corresponding to the full pulse width of the pulse compressed transmission signal, wherein the first matched filter is applied to the receive signal at a time less than twice the pulse width after the pulse compressed transmission signal is provided and the full matched filter is applied to the received signal at a time longer than twice the pulse width after the pulse compressed transmission signal is provided.
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Abstract
A radar system includes an antenna and has short range detection capability. The radar system includes a receiver coupled to the antenna for receiving a receive signal associated with a pulse compressed transmission signal and a matched filter configured to accumulate at least a portion of the receive signal for a particular range. The portion of the receive signal is associated with a corresponding portion of the pulse compressed transmission signal.
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Citations
20 Claims
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1. A radar system including an antenna, the radar system having short range detection capability, the radar system comprising:
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a receiver coupled to the antenna for receiving a receive signal associated with a pulse compressed transmission signal; a first matched filter configured to accumulate at least a portion of the receive signal for a particular range, the portion of the receive signal corresponding to less than a full pulse width of the pulse compressed transmission signal, wherein the matched filter is implemented using a first pulse decompression algorithm executed by a processor; and a full matched filter corresponding to the full pulse width of the pulse compressed transmission signal, wherein the first matched filter is applied to the receive signal at a time less than twice the pulse width after the pulse compressed transmission signal is provided and the full matched filter is applied to the received signal at a time longer than twice the pulse width after the pulse compressed transmission signal is provided. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An aircraft radar system for receiving a receive signal associated with a pulse compressed transmission signal, the aircraft radar system comprising:
a processor for determining a presence of a target in response to data, the processor accumulating at least a portion of the receive signal using a first matched filter configured for a particular range to provide the data, the portion of the receive signal being associated with a corresponding portion of the pulse compressed transmission signal, wherein the first matched filter is implemented using a first pulse decompression algorithm executed by the processor, wherein the processor is further configured to accumulate the received signal using a full matched filter corresponding to an entire pulse width of the received signal after a full pulse width reception period, the full matched filter being implemented using a second pulse decompression algorithm executed by the processor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A weather radar system for detecting a target by providing a radar pulse having a pulse width and receiving a return, the weather radar system comprising:
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means for accumulating portions of the return associated with portions of the radar pulse from different ranges after the radar pulse ends and before a pulse width reception period is completed, the means for accumulating including a set of matched filters; means for accumulating a full return, the means for accumulating the full return including a full matched filter, wherein the full matched filter is applied after the pulse width reception period is completed, wherein the pulse width reception period has a length of the pulse width; and means for detecting a presence of the target at the distance less than the pulse width multiplied by the speed of the pulse using data associated with the portions of the return from the set of matched filters and detecting a presence of the target at the distance more than the pulse width multiplied by the speed of the pulse using data from the full matched filter associated with the full return. - View Dependent Claims (18, 19, 20)
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Specification