发明授权
- 专利标题: Mode detection for DVB receiver
- 专利标题(中): DVB接收机的模式检测
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申请号: US13113399申请日: 2011-05-23
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公开(公告)号: US08711673B1公开(公告)日: 2014-04-29
- 发明人: Jing Fang , Runsheng He , Zhipei Chi
- 申请人: Jing Fang , Runsheng He , Zhipei Chi
- 申请人地址: BM Hamilton
- 专利权人: Marvell International Ltd.
- 当前专利权人: Marvell International Ltd.
- 当前专利权人地址: BM Hamilton
- 主分类号: H04J11/00
- IPC分类号: H04J11/00
摘要:
Systems, apparatus and methods are provided for detecting the mode of a received OFDM signal. A received signal may be correlated with one or more time-delayed version of itself resulting in a set of correlation signals. Each correlation signal may be analyzed for one or more characteristics that can be used to determine the symbol length of the received signal. In order to minimize the number of correlations performed, one or more correlations can be used with varying symbol lengths and a fixed guard interval length. The correlation signals can be processed by filters, and the characteristics of the filtered correlation signals can be analyzed to determine the guard interval length of the received signal. In addition to detecting symbol length, the present invention can be used to detect receiver impairment and perform any appropriate compensations.