Frame synchronizing method for time-domain synchronous orthogonal frequency-division duplex receiver and system |
Title: |
Frame synchronizing method for time-domain synchronous orthogonal frequency-division duplex receiver and system |
|
Application Number: |
200410003482 |
Application Date: |
2004/03/31 |
Announcement Date: |
2005/10/05 |
Pub. Date: |
|
Publication Number: |
1677909 |
Announcement Number: |
|
Grant Date: |
|
Granted Pub. Date: |
|
ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
H04J 11/00, H04L 27/32, H04N 7/015 |
Applicant(s): |
Tsinghua Univ. |
Inventor(s): |
Yang Zhixing, Yang Lin |
Key Words: |
Frame synchronizing method, time-domain synchronous, orthogonal frequency-division duplex, receiver |
Abstract: |
Characters are that TDS - OFDM frame synchronization PN sequence adopted in the invention based on a group of displaced m sequence. Sliding correlation method is utilized to calculate correlativity between oversampled TDS - OFDM signal and local PN sequence. Peak detection is adopted to test correlative peak and location. Phase encoding for adjacent signal frames determines phase of PN sequence in each signal frame. Then, third correlative peak is utilized to determine whether signal is in real synchronization; if no, code capture program is restarted. Experimental verifies that after each frame is captured, timing error is ensured within minus or plus sampling interval / 2 in order to carry out timing track correctly. |
Claim: |
|
Priority: |
|
PCT: |
|
LegalStatus: |
|