For the QPSK modulator shown in the figure above, construct the truth table, phasor diagram, and constellation diagram. In Figure 2, it can be seen that with QPSK, each of the four possible output ...
New optical chips deliver 28 Gb/s of data using DP-QPSK to meet the accelerating demand for more and faster Internet data. Fig 1. A DP-QPSK transmitter and a coherent receiver with ADC and DSP are key ...
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