TDS-OFDM receiver self-adaptive channel estimation balancing method and system |
Title: |
TDS-OFDM receiver self-adaptive channel estimation balancing method and system |
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Application Number: |
200410003480 |
Application Date: |
2004/03/31 |
Announcement Date: |
2005/10/05 |
Pub. Date: |
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Publication Number: |
1677908 |
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: |
H04J 11/00, H04L 27/02, H04N 7/015 |
Applicant(s): |
Tsinghua Univ. |
Inventor(s): |
Yang Zhixing, Yang Lin |
Key Words: |
TDS-OFDM receiver, self-adaptive, channel estimation, balancing method, system |
Abstract: |
The method decomposes received TDS - OFDM signal into two parts: frame synchronization of PN code and DFT data. Based on characteristics of transmission channel, one of following methods is selected to carry out channel estimation: (1) time domain correlation method of PN code is selected, when channel possesses short time multipath disturbance; (2) frequency domain PN transformation approach is selected when channel possesses long time multipath disturbance; (3) frequency domain decision directed feedback method is selected when channel possesses stability characteristics of invariant time. The invention is realized at FPGA of Tsinghua DMB - T, ASIC version receiver. Favorable effect is obtained through actual try out broadcasting and testing, and performance is better than other system evidently. |
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