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US 8,576,116 B2Granted
High speed high resolution wide range low power analog correlator and radar sensor
AssigneePanasonic Corporation
InventorMichiaki Matsuo
Life of this patent
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Abstract
Systems, methods and apparatus related to a high speed, high dynamic range and low power consumption radar system are provided herein. The radar system may include an analog correlator which combines various pulse replication schemes with various parallel integrator architectures to improve the detection speed, dynamic range, and power consumption of conventional radar sensors. The radar system may further include a matched filter for determining a match of a portion of a received PCR signal and producing an output signal in response to further improve the speed of detection of the radar system.
Claims21
A radar system comprising:
- a pulse generator for generating and transmitting a pulse compression radar (PCR) signal having a PCR pulse;
- a receiver module for receiving a version of the PCR signal reflected by the target;
- a matched filter for determining a match of a portion of the reflected version of the PCR signal and producing an output signal in response;
- a controller for determining a time delay based on the output signal of the matched filter;
- a replica generator for generating a template signal having a plurality of replicated PCR pulses with the time delay determined by the controller;
- a multiplier coupled to the replica generator for multiplying the received PCR signal with the plurality of replicated PCR pulses of the template signal;
- an integrator module coupled to the multiplier, and configured to generate a plurality of analog correlation signals, each having a magnitude based on the multiplying between the received PCR signal and one of the plurality of replicated PCR pulses of the template signal;
- and
- a target detector configured to detect a position of the target based on the sampled magnitude of each of the plurality of analog correlation signals.
6 more elements
A radar system, comprising:
- a matched filter for determining a match of a portion of received pulse compression radar (PCR) signal and producing an output signal in response;
- a controller for determining a time delay based on the output signal of the matched filter;
- an analog correlator configured to:
- generate a template signal having a plurality of replicated PCR pulses with an adjustable time delay determined by the controller,
- multiply, using a multiplier, the received PCR signal with the plurality of replicated PCR pulses of the template signal, and
- generate a plurality of analog correlation signals, each having a magnitude based on the multiplying between the received PCR signal and one of the plurality of replicated PCR pulses of the template signal, and
- a target detector configured to detect a position of the target based on the magnitude of each of the plurality of analog correlation signals.
4 more elements
A radar system using I/Q quadrature, comprising:
- a first matched filter for determining a match of a portion of received I signal corresponding to a pulse compression radar (PCR) signal and producing a first output signal in response;
- a second matched filter for determining a match of a portion of a received Q signal corresponding to the PCR signal and producing a second output in response;
- a timing controller coupled to the first matched filter and the second matched filter, the timing controller for determining whether the first output and the second output occur at substantially the same time, and in response, setting a first time delay unit and a second time delay unit when the first output and the second output occur at substantially the same time;
- a first analog correlator coupled to the first time delay unit, and for generating a first set of correlation signals;
- a second analog correlator coupled to the second time delay unit, and for generating a second set of correlation signals;
- and
- a target detector configured to determine a position of the target based on the first set of correlation signals and the second set of correlation signals.
4 more elements
Dependencies are inferred from the claim text.