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 ...

The demand for greater data throughput seems endless, and it is accelerating faster than many people expected, creating bottlenecks in fiber-optics networks. Digital transmissions of 100 Gbps, which ...

Abstract: In this paper a DP-QPSK modulation scheme has been used at 100 Gbps for the propagation length 500 km. To mitigate effects of Chromatic dispersion (CD) and Polarization mode dispersion (PMD) ...

Abstract: This paper reports on the first microwave acoustic quadrature phase-shift keying (QPSK) modulator. Phase modulation is achieved via acoustic phase inversion (API) through electric field ...

This repository contains a complete implementation of digital communication techniques focusing on QPSK (Quadrature Phase Shift Keying) modulation and UDP (User Datagram Protocol) transmission. The ...

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 ...

This demodulator is suitable for the quadrature phase-shift keying (QPSK) modulator previously published by the same author, "Novel Low-Cost QPSK Modulator Needs No Adjustments" (electronic design, ...