Invention Grant
- Patent Title: Near zero intermediate frequency (NZIF) compensation of local oscillator leakage
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Application No.: US15931531Application Date: 2020-05-13
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Publication No.: US11431092B1Publication Date: 2022-08-30
- Inventor: David Francois Jacquet , Marc Gens , Paul Lee Pearson , Pascal Triaire
- Applicant: Space Exploration Technologies Corp.
- Applicant Address: US CA Hawthorne
- Assignee: Space Exploration Technologies Corp.
- Current Assignee: Space Exploration Technologies Corp.
- Current Assignee Address: US CA Hawthorne
- Agency: Polsinelli PC
- Main IPC: H04B1/00
- IPC: H04B1/00 ; H01Q3/26 ; H01Q3/42 ; H01Q3/38 ; H04B17/19 ; H04B17/12

Abstract:
In an embodiment, a communications system includes a transmitter including a digital beamforming baseband section including a digital mixer, the digital beamforming section configured to receive an input signal to be transmitted, the input signal at a baseband frequency; and a modulation section electrically coupled to the digital beamforming baseband section, the modulation section including an up converter configured to receive a local oscillator signal at a local oscillator frequency. The digital mixer is configured to apply a baseband frequency shift to the input signal to generate a baseband frequency shifted input signal at a different frequency from the baseband frequency. The up converter is configured to up convert the baseband frequency shifted input signal based on the local oscillator signal to generate a modulated signal at a carrier frequency, wherein the local oscillator frequency is different from the carrier frequency.
Information query