Invention Grant
US08509722B2 Frequency drift estimation for low cost outdoor unit frequency conversions and system diagnostics 有权
低成本户外单位频率转换和系统诊断的频率漂移估计

  • 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
  • Application No.: US13554022
    Application Date: 2012-07-20
  • Publication No.: US08509722B2
    Publication 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
Frequency drift estimation for low cost outdoor unit frequency conversions and system diagnostics
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.
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