Radar receiver and method for receiving a radar signal
AssigneeInfineon Technologies AG
InventorStefan HERZINGER
Life of this patent
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Abstract
Implementations of the present disclosure relate to a radar receiver for a real-valued analog RF radar signal. The radar receiver comprises a quadrature mixer circuit configured to generate, from the real-valued analog RF radar signal, a complex-valued analog signal comprising an inphase (I) signal component and a quadrature (Q) signal component, an analog polyphase filter configured to filter the I- and Q-signal components of the complex-valued analog signal to generate filtered I- and Q-signal components, and an analog-to-digital converter coupled to an output of the analog polyphase filter. The radar receiver is configured to convert only one of the filtered I- and Q-signal components from the analog to the digital signal domain.
Claims20
A radar receiver for a real-valued analog radio frequency (RF) radar signal, the radar receiver comprising:
- a quadrature mixer circuit configured to generate, from the real-valued analog RF radar signal, a complex-valued analog signal comprising an inphase (I) signal component and a quadrature (Q) signal component;
- an analog polyphase filter configured to filter the I-signal component and the Q-signal component of the complex-valued analog signal to generate filtered I- and Q-signal components;
- and
- an analog-to-digital converter coupled to an output of the analog polyphase filter,
- wherein the radar receiver is configured to convert only one of the filtered I- and Q-signal components from an analog signal domain to a digital signal domain.
A frequency modulated continuous wave (FMCW) radar receiver, comprising:
- a quadrature mixer circuit configured to generate, from a local oscillator (LO) signal having an asymmetric chirp and a received FMCW radar signal, a complex-valued analog beat-frequency signal;
- an analog polyphase filter configured to filter an inphase (I) signal component and a quadrature (Q) signal component of the complex-valued analog beat-frequency signal to generate filtered I- and Q-beat-frequency signal components;
- and
- an analog-to-digital converter coupled to an output of the analog polyphase filter,
- wherein the FMCW radar receiver is configured to analog-to-digital convert only one of the filtered I- and Q-beat-frequency signal components to form an analog-to-digital converted beat-frequency signal component.
A method for receiving a real-valued analog radio frequency (RF) radar signal, the method comprising:
- mixing the real-valued analog RF radar signal with a complex-valued RF signal to generate a down-converted complex-valued analog signal comprising an inphase (I) signal component and a quadrature (Q) signal component;
- filtering the I-signal component and the Q-signal component of the down-converted complex-valued analog signal with an analog polyphase filter to generate filtered I- and Q-signal components;
- and
- converting only one of the filtered I- and Q-signal components from an analog signal domain to a digital signal domain to form an analog-to-digital converted filtered signal component in the digital domain.
Dependencies are inferred from the claim text.