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 ...

Abstract: This paper presents the design and simulation of a QPSK modulator (quadrature phase shift keying) based on direct carrier modulation technique with a very simple circuitry. In this design, ...

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 ...

Abstract: Achieving ultra reliable and low latency communication with short length information blocks has been an open research problem in the recent years. The bit ...