发明授权
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
- 专利标题: Robust sensing of DVB-T/H transmissions in the presence of frequency offsets
- 专利标题(中): 在存在频率偏移的情况下对DVB-T / H传输的鲁棒感应
-
申请号: US13319820申请日: 2010-04-23
-
公开(公告)号: US09100226B2公开(公告)日: 2015-08-04
- 发明人: Vasanth Gaddam
- 申请人: Vasanth Gaddam
- 申请人地址: NL Eindhoven
- 专利权人: KONINKLIJKE PHILIPS N.V.
- 当前专利权人: KONINKLIJKE PHILIPS N.V.
- 当前专利权人地址: NL Eindhoven
- 代理商 Larry Liberchuk
- 国际申请: PCT/IB2010/051798 WO 20100423
- 国际公布: WO2010/131139 WO 20101118
- 主分类号: H04L27/12
- IPC分类号: H04L27/12 ; H04L27/00 ; H04L27/26
摘要:
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.
公开/授权文献
信息查询