Method of self-adapting sub band Turbo encoding modulation in use for OFDM |
Title： |
| Method of self-adapting sub band Turbo encoding modulation in use for OFDM |
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Application Number： |
200310103049 |
Application Date： |
2003/10/31 |
Announcement Date： |
2004/10/27 |
Pub. Date： |
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Publication Number： |
1540895 |
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： |
H03M 13/00H03M 13/23H04J 1/00H04J 11/00 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Zhou Shidong, She Xiaoming, Zhou Chunhui |
Key Words： |
self-adapting, sub band, Turbo, encoding modulation, OFDM |
Abstract： |
Associated coded modulation is carried out for sub carriers in same sub band of frequency domain in adjacent several OFDM symbols under restriction of constant sending power of sub carrier and target error rate, in order to adapt requirement of high performance Turbo coded modulation. Meanwhile, estimation of transmitting capacity is carried out for current sub band under various coded modulations utilized by using formula of channel capacity for discrete input and continuous output under white Gaussian noise channel in limited band. Parameters of coded modulation, which possesses largest throughput but less than estimated throughput of the sub band, are selected as the parameters of coded modulation for the sub band. The invention obtains higher utilization rate of frequency spectrum, and reduces overhead of feedback of system at same time. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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