Quick frequency hopping and expanding communication method based on orthogonal frequency division duplexing |
Title： |
| Quick frequency hopping and expanding communication method based on orthogonal frequency division duplexing |
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Application Number： |
200610088843 |
Application Date： |
2006/07/20 |
Announcement Date： |
2007/01/24 |
Pub. Date： |
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Publication Number： |
1901529 |
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 27/32, H04B 1/713, H04J 11/00 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Zhang Chao, Wang Youzheng, Lu Jianhua |
Key Words： |
Quick frequency hopping and expanding, orthogonal frequency division duplexing |
Abstract： |
This invention relates to a quick hop-expansion communication method based on OFDM, in which, an transmission end generates frequency expansion sequence, sub-carrier distribution signals and FH sequences according to user request, carries out direct sequence frequency expansion or code process then to modulate symbols then distributes the modulated signals to the sub-carriers of communication signals of users according to the sub-carrier distribution signals to be added with circulation prefix for D/A conversion then modulates the received analog signal to the carrier frequency generated according to the FH sequence, the receiving end receives signals then carries out de-FH, A/D conversion and removing the circulation prefix and de-modulates the modulation signals on the sub-carrier of the user communication signals to be output in series to get the user data after the symbol is de-modulated, de-coding or de-FH. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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