Several examples of QPSK modulation codes that have the same minimum squared Euclidean distance as the best QPSK modulation codes, of the same rate and length, are given. In the new constructions of ...

Constellation diagrams are commonly used in analyzing the performance of data communications systems using quadrature signal generation techniques such as QPSK. ... Vector signal generators or digital ...

Figure 1 shows a block diagram of the proposed UQPSK modulator. In a conventional QPSK modulator, the carrier source signal is divided equally by a 3-dB/90-deg. branch line hybrid coupler to yield two ...

Fig. 3: Simplified block diagram of the project. The QPSK modulator and demodulator with Costas phase-locked loop and DAC/ADC drivers are placed in FPGA. Also, the GNU Radio application prepares the ...

BPSK - Binary Phase Shift Keying: BPSK is a two phase modulation scheme, where the 0’s and 1’s in a binary message are represented by two different phase states in the carrier signal: θ=0∘ for binary ...

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 ...

Simulate the performance of different modulation schemes, BPSK, QPSK, FSK, QAM(16-64) in an AWGN environment. BPSK. BPSK is a two phase modulation scheme, where the 0’s and 1’s in a binary message are ...

IEEE Xplore, delivering full text access to the world's highest quality technical literature in engineering and technology. | IEEE Xplore ...