OFDM receiving and dispatching system for high speed mobile environment
Title:
OFDM receiving and dispatching system for high speed mobile environment
Application Number:
200710119956
Application Date:
2007/08/03
Announcement Date:
2008/01/30
Pub. Date:
Publication Number:
101115047
Announcement Number:
Grant Date:
Granted Pub. Date:
ApplicationType:
Invention
State/Country:
11[China|beijing]
IPC:
H04L 27/26
Applicant(s):
Tsinghua University
Inventor(s):
Lu Jianhua, Long Yi, Kuang Linling
Key Words:
OFDM, receiving system, dispatching system, high speed mobile, environment
Abstract:
An orthogonal frequency division multiplexing OFDM transceiver system that is applicable to high speed mobile environment belongs to the technical field of digital communication and is characterized in that at the sending end, the data is segmented and goes through fast reverse fourier transform respectively, and OFDM sub-symbols after transformation are directly cascaded and are attached with a zero protective suffix, thus a relatively big sub-carrier interval is acquired and intercarrier interference caused by Doppler-spread is lessened, but the sensitivity of the system to inter sub-symbol interference. At the receiving end, an interference cancellation receiving device and method that uses sub-carrier given information is designed and the inter sub-symbol interference caused by multipath delay spread is eliminated. The invention causes little or no loss in spectral efficiency of OFDM system, and under the same channel condition, the system of the invention can improve the moving speed supported by traditional methods by about 1.6 times.
Claim:
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PCT:
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