16QAM


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AcronymDefinition
16QAMSixteen-Phase Quadrature Amplitude Modulation
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CQI MCS Type of Code Rate SE Bits/Hz Modulation x1Kbits/sec 1 0 QPSK 78 0.1523 2 2 QPSK 120 0.2344 3 4 QPSK 193 0.3770 4 6 QPSK 308 0.6016 5 8 QPSK 449 0.8770 6 10 QPSK 602 1.1758 7 12 16QAM 378 1.4766 8 14 16QAM 490 1.9141 9 16 16QAM 616 2.4063 10 18 64QAM 466 2.7305 11 20 64QAM 567 3.3223 12 22 64QAM 666 3.9023 13 24 64QAM 772 4.5234 14 26 64QAM 873 5.1152 15 28 64QAM 948 5.5547 TABLE III.
Elastic optical network is deployed with a typical channel spacing of 12.5 GHz ([G.sub.EON] = 12.5 GHz) and five modulation format assignment scenarios including four single modulation format (BPSK, QPSK, 8QAM and 16QAM) and a distance-adaptive schemes.
Caption: Figure 4: The BER performance of the proposed detectors with [N.sub.T] = 8, [N.sub.R] = 4, and 16QAM modulation.
Figure 5 shows the PAPR performances of OFDM signal for 128 subcarriers and 16QAM modulation scheme.
In this achievement, 116-wavelengths with a 36 Giga-Baud (Giga corresponds to a 109), 16QAM (16-level = 24) modulation, and polarization multiplexed (2-orthogonal polarizations) were transmitted.
The proposed system parameters is shown in table(1), a dual 16QAM O-OFDM system were used, the selected optical link is a standard SMF consist of 20 loops of 50Km,each loop has an optical amplifier of gain 10 dB, the dispersion coefficient 16.75 ps/nm x km, an attenuation of 0.2 dB/km.
The data is generated randomly, after that, it is modulated with QPSK, 16QAM and 64QAM, respectively.
Figure 4 shows the PCC based on BPSK, QPSK, 8PSK, and 16QAM at different SNR.
PHY layer is supported with different modulation techniques such as QPSK, 16QAM, and 64QAM with convolutional encoding with different coding rates [3].
Unfortunately, furtherstudies have shownthatitislimited to some scenarios, single-input single-output (SISO) and 2 x 2 MIMO channels with constellation of BPSK, QPSK, 16QAM, and 64QAM.