发明名称 |
A SPREAD-SPECTRUM TRANSMISSION SYSTEM WITH FILTERED MULTI-CARRIER MODULATION |
摘要 |
The invention provides a spread-spectrum transmission system with multiple carrier modulation in which the signals for transmission over each of the subcarriers are filtered prior to being transmitted over the subcarrier, thereby making it possible on reception to synchronize the various subcarriers in time, and in which each subcarrier carries a plurality of chips that result from spreading a single symbol. With coherent modulation, the number of chips resulting from spreading a single symbol and transmitted over each subcarrier is selected so as to enable the various subcarriers to be put into phase alignment by recombining the chips coming from the same symbol on each subcarrier. With differential modulation, the transmission over each subcarrier of chips resulting from spreading a single symbol provides resistance to jamming by limiting recombination losses because of the differential modulation.
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申请公布号 |
CA2285164(A1) |
申请公布日期 |
2000.04.16 |
申请号 |
CA19992285164 |
申请日期 |
1999.10.07 |
申请人 |
ALCATEL |
发明人 |
RICHARD, JOEL;BUDA, FABIEN;LEMOIS, EMMANUEL |
分类号 |
H04L5/02;H04L27/26;(IPC1-7):H04B1/69;H04B14/08 |
主分类号 |
H04L5/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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