发明名称 |
NOTCH FILTERING FOR OFDM SYSTEM WITH NULL POSTFIX |
摘要 |
Transmission systems and methods for reducing interference by wideband communication systems with narrowband communications systems are disclosed. In some embodiments an ultrawideband system employing orthogonal frequency division multiplexing (OFDM) with a null post-fix nulls symbols for sub-carriers at potentially interfering frequencies prior to transformation to the time domain and filters a time domain representation using a notch filter to further reduce spectral components at the potentially interfering frequencies. In further embodiments pre-emphasis is applied to a frequency domain representation of symbols to reduce ripples introduced by the notch filter.
|
申请公布号 |
US2008056395(A1) |
申请公布日期 |
2008.03.06 |
申请号 |
US20070846484 |
申请日期 |
2007.08.28 |
申请人 |
BRINK STEPHAN TEN;MAHADEVAPPA RAVISHANKAR H |
发明人 |
BRINK STEPHAN TEN;MAHADEVAPPA RAVISHANKAR H. |
分类号 |
H04B7/02;H04L27/28 |
主分类号 |
H04B7/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|