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 ...

Eliminating software adjustments in circuits based on digital logic improves robustness and reduces cost for small-production-run series. This circuit is a cost-improved version of classical QPSK ...

GigOptix Reinforces 100Gbps Leadership at OFC/NFOEC; First Demo of Quad Driver and Polymer Modulator Bundle, as the Core for Next Gen Small Form Factor 100Gbps Transceiver, and Active Optical Cable ...