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September 19, 2015 at 2:36 am
#24923
Sample rate is determined by multiplexing samples per bit and the bit rate. The higher the sample rate, it is expected in many cases that the performance is increased. Center frequency of the optical receiver should be the same as the frequency used for up-conversion. And the cut-off frequency is related to the bandwidth of the signal, which is related to the bit rate (or symbol rate).