Invention Grant
US09100226B2 Robust sensing of DVB-T/H transmissions in the presence of frequency offsets 有权
在存在频率偏移的情况下对DVB-T / H传输的鲁棒感应

  • Patent Title: Robust sensing of DVB-T/H transmissions in the presence of frequency offsets
  • Patent Title (中): 在存在频率偏移的情况下对DVB-T / H传输的鲁棒感应
  • Application No.: US13319820
    Application Date: 2010-04-23
  • Publication No.: US09100226B2
    Publication Date: 2015-08-04
  • Inventor: Vasanth Gaddam
  • Applicant: Vasanth Gaddam
  • Applicant Address: NL Eindhoven
  • Assignee: KONINKLIJKE PHILIPS N.V.
  • Current Assignee: KONINKLIJKE PHILIPS N.V.
  • Current Assignee Address: NL Eindhoven
  • Agent Larry Liberchuk
  • International Application: PCT/IB2010/051798 WO 20100423
  • International Announcement: WO2010/131139 WO 20101118
  • Main IPC: H04L27/12
  • IPC: H04L27/12 H04L27/00 H04L27/26
Robust sensing of DVB-T/H transmissions in the presence of frequency offsets
Abstract:
A method and system is provided for detecting the presence of a DVB (digital video broadcasting) transmission with frequency offsets. The method includes receiving an RF (radio frequency) signal in a selected channel; creating samples from the received RF signal; estimating a frequency offset of the samples; correcting the samples with the estimated frequency offset; correlating the corrected samples with a reference signal; and comparing a correlation result with a threshold value. The frequency offset estimation includes selecting a set of three or more pilots that are boosted continual pilots transmitted at fixed sub-carrier locations in all symbols; transforming the received samples to the frequency domain; determining locations of maxima in the transformed samples, the maxima corresponding to the pilots in the set; and comparing the determined locations with the expected pilot locations in the set.
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