Quadrature phase shift key is a one of the digital modulation schemes that use Phase-shift keying. One popular varient of QPSK is offset QPSK or OQPSK. What is the difference between these two ...
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 ...
Fig 1. A DP-QPSK transmitter and a coherent receiver with ADC and DSP are key analog components for long-distance transmission systems. Fig 2. Shown is the measured (blue, green) and simulated (red) ...
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