Invention Grant
- Patent Title: Frequency drift estimation for low cost outdoor unit frequency conversions and system diagnostics
- Patent Title (中): 低成本户外单位频率转换和系统诊断的频率漂移估计
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Application No.: US13554022Application Date: 2012-07-20
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Publication No.: US08509722B2Publication Date: 2013-08-13
- Inventor: Robert F. Popoli
- Applicant: Robert F. Popoli
- Applicant Address: US CA El Segundo
- Assignee: The DIRECTV Group, Inc.
- Current Assignee: The DIRECTV Group, Inc.
- Current Assignee Address: US CA El Segundo
- Main IPC: H04B7/00
- IPC: H04B7/00

Abstract:
Systems and devices for controlling frequency drift in satellite broadcast systems. A receiver antenna system for a direct broadcast satellite signal communications system in accordance with one or more embodiments of the present invention comprises an oscillator, a mixer, coupled to the oscillator, for converting satellite signals at a first frequency to signals at an intermediate frequency, an analog-to-digital (A/D) converter, coupled to the mixer, for receiving the signals at the intermediate frequency and for converting the signals at the intermediate frequency at near-real-time to a digital data stream, a Digital Signal Processor (DSP), coupled to the A/D converter, for processing the digital data stream, and a drift estimator, coupled to the DSP, the drift estimator determining a frequency drift of the oscillator, wherein the receiver antenna system corrects the frequency drift of the oscillator using the determined frequency drift.
Public/Granted literature
- US20120281745A1 FREQUENCY DRIFT ESTIMATION FOR LOW COST OUTDOOR UNIT FREQUENCY CONVERSIONS AND SYSTEM DIAGNOSTICS Public/Granted day:2012-11-08
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