发明申请
US20080273630A1 DECODING SYMBOLS OF A SIGNAL DISTRIBUTED ACCORDING TO FREQUENCY AND TIME DIMENSIONS
审中-公开
根据频率和时间尺寸分解的信号的解码符号
- 专利标题: DECODING SYMBOLS OF A SIGNAL DISTRIBUTED ACCORDING TO FREQUENCY AND TIME DIMENSIONS
- 专利标题(中): 根据频率和时间尺寸分解的信号的解码符号
-
申请号: US12110423申请日: 2008-04-28
-
公开(公告)号: US20080273630A1公开(公告)日: 2008-11-06
- 发明人: Philippe Mege , Laurent Martinod
- 申请人: Philippe Mege , Laurent Martinod
- 申请人地址: FR Elancourt
- 专利权人: Eads Secure Networks
- 当前专利权人: Eads Secure Networks
- 当前专利权人地址: FR Elancourt
- 优先权: FR0754895 20070504
- 主分类号: H04L27/06
- IPC分类号: H04L27/06
摘要:
A signal of OFDM type received in a radio receiver via a propagation channel includes symbols distributed according to frequency and time. The receiver determines likelihoods of the symbols, decodes the received signal to yield a decoded signal as a function of the likelihoods of the symbols, and estimates an instantaneous noise power of the received signal as a function of a difference between the received signal and a reconstructed noise-free signal derived from the decoded signal. A filtering module determines a bounded distribution of the instantaneous noise power as a function of frequency and/or time, and filters the distribution to yield a filtered noise variance as a function of a frequency and/or time parameter of the propagation channel. A corrector weights the likelihoods of the symbols of the received signal to be decoded as a function of the filtered noise variance.
信息查询