Transmitting method for physical layer descending chain circuit frame of broad band wireless multimedia system |
Title： |
| Transmitting method for physical layer descending chain circuit frame of broad band wireless multimedia system |
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Application Number： |
200610112440 |
Application Date： |
2006/08/18 |
Announcement Date： |
2007/02/07 |
Pub. Date： |
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Publication Number： |
1909546 |
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 27/26, H04B 1/707, H04B 7/26, H04J 13/00, H04N 5/44 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Xia Liang, Su Xin, Xu Xibin, Zhou Shidong, Zhao Ming |
Key Words： |
Transmitting method, descending chain circuit frame, broad band wireless multimedia system |
Abstract： |
The invention relates to a digit information technique of wideband wireless multimedia system, wherein it is characterized in that: it uses large base station to emit broadcast service, and uses small base station to emit communication service; the communication frame uses one N-point IFFT data block and one L-point protective distance filled by PN sequence to form OFDM mark; the broadcast frame uses one 4N-point IFFT data block and one 4L-point protective distance filled by PN sequence to form OFDM mark; the communication frame is formed by eight OFDM marks; the broadcast frame is formed by two OFDM marks; for 4N-point IFFT or FFT, it first rearranges the 4N data, then treats it with 4-butterfly transformation. The invention can be used in different band widths, as 1.25MHz, 2.5MHz, 5MHz, 10MHz, 15MHz, and 20MHz. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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