| 摘要 |
We describe a method of sending RF signals over a wired communications link, the method comprising: inputting an RF signal bearing data symbols at a symbol rate; digitising a version of said RF signal to provide digitised samples of said data symbols, a said sample comprising data defining a digitised I and Q value for said version of said RF signal; and sending said digitised I and Q values for said samples over a wired communications link. The digitising comprises: oversampling said version of said RF signal to provide an oversampled digital symbol data stream, and decimating said oversampled digitised symbol data stream to provide a decimated stream of said samples for sending over said wired communications link, where said decimated stream of said samples has an integral number of samples for each said data symbol. The method further comprises selecting a timing of said decimated stream of samples with respect to said version of said RF signal which substantially minimises a variance of the stream of samples. |
