Frequency domain channel estimation method of crossing frequency division multiplexing system with time-domain enveloping weighting |
Title： |
| Frequency domain channel estimation method of crossing frequency division multiplexing system with time-domain enveloping weighting |
|
Application Number： |
200610112442 |
Application Date： |
2006/08/18 |
Announcement Date： |
2007/02/07 |
Pub. Date： |
|
Publication Number： |
1909527 |
Announcement Number： |
|
Grant Date： |
|
Granted Pub. Date： |
|
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H04L 25/02, H04L 27/06, H04L 25/08 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Gao Qunyi, Zhou Shidong |
Key Words： |
Frequency domain channel estimation method, crossing frequency division multiplexing system |
Abstract： |
The invention relates to a frequency interpolation method and a frequency domain noise filter method in OFDM mark, wherein it is characterized in that: based on single-receiving single-sending OFDM system, or the multi-sending multi-receiving system whose pilot positions are orthogonal, in the converted time domain sequence, enveloping and weighting to restrain the time domain noise, while the higher of enveloping value, the weighting factor is near to 1; or else, the weighting factor is near to 0; the invention provides the formula to calculate best envelop weighting factor; and it also provides a weighting factor calculation based on constant envelop weighting similar, threshold valve envelop similar and incline envelop weighting similar. The invention can improve the property of signal channel estimate after OFDM frequency domain interpolation. |
Claim： |
|
Priority： |
|
PCT： |
|
LegalStatus： |
|
Relevancy information
