Pi/2 phase shift non-square M-QAM modulation and demodulation method and its system |
Title: |
Pi/2 phase shift non-square M-QAM modulation and demodulation method and its system |
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Application Number: |
200510011259 |
Application Date: |
2005/01/26 |
Announcement Date: |
2005/08/03 |
Pub. Date: |
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Publication Number: |
1649339 |
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 27/34 |
Applicant(s): |
Tsinghua Univ. |
Inventor(s): |
Yang Zhixing, Liu Changqing, Guo Xingbo |
Key Words: |
Pi/2 phase shift, non-square, M-QAM, modulation, demodulation |
Abstract: |
The modulation/demodulation method of non-square M-QAM of pi/2 phase shift characterizes in transmitting two signal constellation patterns different in pi/2 at odd-even time, which can effectively eliminate 180deg phase jump in the modulation of non-square M-QAM so as to reduce the envelope fluctuation of the signals. |
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