| 摘要 |
<p>A signal generating method and apparatus in the field of signal technologies are provided. The method includes: adjusting an incident angle of an optical signal entering a polarization beam splitter, so that the polarization beam splitter outputs a first optical signal and a second optical signal that have a preset power ratio; performing QPSK modulation on the first optical signal by using an externally input data stream, to obtain a first QPSK optical signal; performing QPSK modulation on the second optical signal by using an externally input data stream, to obtain a second QPSK optical signal; before the first QPSK optical signal and the second QPSK optical signal are input into a polarization beam combiner, adjusting a polarization state of the first QPSK optical signal or a polarization state of the second QPSK optical signal; when the polarization states of the two QPSK optical signals are the same, outputting, by the polarization beam combiner, a 16QAM signal; and when the polarization states of the two QPSK optical signals are orthogonal, outputting, by the polarization beam combiner, a DP-QPSK signal. Different signals can be generated according to the embodiments of the present invention.</p> |
