| 摘要 |
The invention relates to a device for exchanging digital data between several sources and at least one hub in a CDMA system, characterised in that it comprises a number n of digital transmission/reception circuits ( 1 ) installed in parallel, each circuit ( 1 ) comprising a transmitter ( 2 <SUB>i</SUB>) comprising means of generating an integer number N<SUB>c </SUB>of codes that will be used for spectral spreading of data to be transmitted and a receiver ( 4 <SUB>i</SUB>) comprising means ( 46, 48 ) of detecting the access of new sources to the CDMA system transmission channel and means ( 49 ) of generating synchronisation signals and power control signals corresponding to each detected new source.
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