Channel estimation method for solving OFDM interception position hopping using rotating technology |
Title： |
| Channel estimation method for solving OFDM interception position hopping using rotating technology |
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Application Number： |
200610113038 |
Application Date： |
2006/09/08 |
Announcement Date： |
2007/02/28 |
Pub. Date： |
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Publication Number： |
1921466 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H04L 25/02, H04L 27/26 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Zhou Shidong, Gao Qunyi, Zhang Xiujun, Zhao Ming, Li Yunzhou, Wang Jing |
Key Words： |
rotating technology, OFDM, interception position hopping, channel estimation |
Abstract： |
The invention relates to a MIMO-OFDM system receiving technique, which is characterized in that: the receiver based on the change of OFDM best cutting position calculates the rotation bits used to compensate the change; rotating the cut time domain sequence, inputting it into FFT to obtain the frequency domain receiving value of OFDM system; obtaining the signal channel estimate value sequence of pilot sub carrier wave; treating signal channel estimated value with IFFT, to obtain the signal channel estimated value time domain sequence; rotating, zeroing, and rotating the time domain sequence to input it into FFT module to converted inversely into frequency domain to obtain the signal channel estimated value sequence of all sub carrier waves; at least using interpolation algorism to obtain the signal channel estimated value of all OFDM marks. The invention can confirm the estimation accuracy without additional system complexity. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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