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公开(公告)号：US10725175B2
公开(公告)日：2020-07-28
申请号：US16175199
申请日：2018-10-30
发明人： Cenk Sahin , Justin G. Metcalf , Braham Himed
摘要： A receiver method and apparatus provides a more efficient computation and application of optimal filters. Range and Doppler processing in the receiver are decoupled and, as a result, computational complexity required for both filter computation and filtering stages are significantly reduced. In one embodiment, a response to an emitted signal is demodulated and sampled to provide baseband samples. The response includes a component due to interaction of the emitted signal with a target, The baseband samples are filtered in a bank of N parallel range filters to provide N filter outputs for each of the baseband samples. For one or more Doppler phase shifts ϕ, a discrete Fourier transform of the N filter outputs is computed to produce Doppler components that may be analyzed to determine at least one of a presence, range and speed of the target.
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公开(公告)号：US20200132836A1
公开(公告)日：2020-04-30
申请号：US16175199
申请日：2018-10-30
发明人： Cenk Sahin , Justin G. Metcalf , Braham Himed
摘要： A receiver method and apparatus provides a more efficient computation and application of optimal filters. Range and Doppler processing in the receiver are decoupled and, as a result, computational complexity required for both filter computation and filtering stages are significantly reduced. In one embodiment, a response to an emitted signal is demodulated and sampled to provide baseband samples. The response includes a component due to interaction of the emitted signal with a target, The baseband samples are filtered in a bank of N parallel range filters to provide N filter outputs for each of the baseband samples. For one or more Doppler phase shifts ϕ, a discrete Fourier transform of the N filter outputs is computed to produce Doppler components that may be analyzed to determine at least one of a presence, range and speed of the target.
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3.发明申请公开(公告)号：US20220350009A1
公开(公告)日：2022-11-03
申请号：US17761326
申请日：2020-09-18
申请人： University of Kansas , Government of the United States, as represented by the Secretary of the Air Force
发明人： Cenk Sahin , Patrick M. McCormick , Justin G. Metcalf , John Jakabosky , Shannon David Biunt , Erik S. Perrins
摘要： Systems, methods, and computer-readable storage media for generating and utilizing radar signals with embedded data are disclosed. Data is encoded onto a CPM waveform, which is then combined with a base radar waveform to produce a radar-embedded communication (REC) waveform. Both the CPM waveform and the base radar waveform may have a continuous phase and constant envelope, resulting in the REC waveform having a continuous phase and constant envelope. The changing (e.g., on a pulse-to-pulse basis) nature of the REC waveform causes RSM of clutter which may result in residual clutter after clutter cancellation, decreasing target detection performance of the radar system. In an aspect, various parameters may be utilized to dynamically adjust the performance of the radar system for a particular operating scenario, such as to enhance radar signal processing or enhance data communication capabilities.
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公开(公告)号：US20210132211A1
公开(公告)日：2021-05-06
申请号：US17086006
申请日：2020-10-30
申请人： University of Kansas , Government of the United States, as represented by the Secretary of the Air Force
IPC分类号： G01S13/538 , G01S7/00
摘要： Systems and methods of embodiments provide a feasible approach to implementing Far-Field Radiated Emission Design (FFRED) techniques suitable for simultaneous transmission of radar and communication signals. A set of signals for transmission and a transmission direction for each signal of the set of signals may be determined. The set of signals includes at least a first signal associated with a first transmission direction and a second signal associated with a second transmission direction that is different from the first direction. An optimization problem is configured based on characteristics of an antenna array and the set of signals and then solved to identify a set of waveforms suitable for transmitting the signals. The set of waveforms may include at least two waveforms, each of the at least two waveforms configured for transmission by a different antenna element of the antenna array. The determined waveforms may be coherent in the far-field and suitable for power efficient transmission.
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