Photonic assisted digital radar system
First Claim
1. A photonic-assisted digital radar system (1) comprising:
- an active electronically-scanned antenna (2);
a transmitting section (3) connected to the antenna (2) and configured to generate and transmit RF signals (SF1) via the antenna (2); and
a receiving section (4) connected to the antenna (2) and configured to receive and process electric analog signals (SE2) associated to received RF signals (SF2);
the transmitting section (3) comprising;
a waveform generator (5) configured to generate an electric modulating signal in the form of a pulsed waveform (SWG); and
a modulator (6) configured to receive an electric transmission carrier (STALO) and the electric modulating signal (SWG) and to modulate the transmission carrier (STALO) by means of the modulating signal (SWG), thereby generating a radiofrequency signal (SF1) to be transmitted via the antenna (2);
characterized in that the receiving section (4) comprises;
photonic-assisted analog-to-digital converting means (8) configured to convert electric analog signals (SE2) into corresponding electric digital signals (SED); and
digital signal processing means (9) configured to receive and process the electric digital signals (SED);
wherein the photonic-assisted analog-to-digital converting means (8) comprises;
a mode-locked laser device (11) configured to generate an optical clock signal (SS); and
electronic analog-to-digital converting means (13);
the electronic analog-to-digital converter means (13), the waveform generator (5), the modulator (6) and the digital signal processing means (9) being configured to operate based on respective electric clock signals (CK3),(CK1),(CK2),(CK4) generated based on the optical clock signal (SS).
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Accused Products
Abstract
A photonic-assisted digital radar system comprising an active electronically-scanned antenna; a transmitting section comprising a waveform generator to generate a modulating signal; and a modulator to receive a transmission carrier and the modulating signal and to modulate the transmission carrier by means of the modulating signal; and a receiving section comprising a photonic-assisted analog-to-digital converter to convert electric analog signals into electric digital signals; and a digital signal processor to receive and process the electric digital signals. The photonic-assisted analog-to-digital converter comprises a mode-locked laser to generate an optical clock signal; and an electronic analog-to-digital converter; wherein the electronic analog-to-digital converter, the waveform generator, the modulator and the digital signal processor are configured to operate based on electric clock signals generated based on the optical clock signal.
18 Citations
7 Claims
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1. A photonic-assisted digital radar system (1) comprising:
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an active electronically-scanned antenna (2); a transmitting section (3) connected to the antenna (2) and configured to generate and transmit RF signals (SF1) via the antenna (2); and a receiving section (4) connected to the antenna (2) and configured to receive and process electric analog signals (SE2) associated to received RF signals (SF2); the transmitting section (3) comprising; a waveform generator (5) configured to generate an electric modulating signal in the form of a pulsed waveform (SWG); and a modulator (6) configured to receive an electric transmission carrier (STALO) and the electric modulating signal (SWG) and to modulate the transmission carrier (STALO) by means of the modulating signal (SWG), thereby generating a radiofrequency signal (SF1) to be transmitted via the antenna (2); characterized in that the receiving section (4) comprises; photonic-assisted analog-to-digital converting means (8) configured to convert electric analog signals (SE2) into corresponding electric digital signals (SED); and digital signal processing means (9) configured to receive and process the electric digital signals (SED); wherein the photonic-assisted analog-to-digital converting means (8) comprises; a mode-locked laser device (11) configured to generate an optical clock signal (SS); and electronic analog-to-digital converting means (13); the electronic analog-to-digital converter means (13), the waveform generator (5), the modulator (6) and the digital signal processing means (9) being configured to operate based on respective electric clock signals (CK3),(CK1),(CK2),(CK4) generated based on the optical clock signal (SS). - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification