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64QAM64-State Quadrature Amplitude Modulation
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'Figure 1 illustrates the fact that, due to the high modulation order of the second path (using 64QAM), its required OSNR is about 4dB higher than that of the first path (using 16QAM), while both achieving 600 Gb/s net data rate.
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.
Caption: Figure 2: The BER performance of the proposed detectors with [N.sub.T] = 4, [N.sub.R] = 4, and 64QAM modulation.
This bitwise computation achieves acceptable accuracy for single-input single-output (SISO) and 2x2 MIMO channels with BPSK, QPSK, 16QAM, and 64QAM [4].
Figure 6, displays the CCDF comparisons for PAPR of the OFDMA, the LFDMA, the SLM based LFDMA, the PTS based LFDMA uplink systems with V = 4, for M = 64 and N = 256 with 64QAM modulation.
The arbitrary waveform generation capabilities of the AWG70000 Series make it possible to create multilevel signals such as 16QAM or 64QAM, add impairments to a signal, or create waveforms that are pre-compensated for the real-world effects of the test system."
A prime example is RFaxis' RFX240, a 2.4GHz 11b/g/n/ac PA based on standard 0.18um CMOS process, that delivers 26dBm (400mW) linear power with 3% EVM for 64QAM OFMD at 5V supply voltage, with excellent power added efficiency (PAE) surpassing that of competitor designs using GaAs or SiGe processes.
Described as a programmable wideband, secure, networked radio, the SeaLancet can handle data, imagery and streaming video, accommodating a variety of waveforms offering different data rates from six Mbps with a Binary Phase Shift Keying (BPSK) waveform to the 64QAM (Quadrature Amplitude Modulation) waveform with its link burst rate of 54 Mbps.
Additional Q-Flex features include XStream IP's TCP acceleration, header and payload compression, dynamic routing, traffic shaping, encryption, and ACM; optimized spectral roll-off for up to 20% bandwidth savings; other bandwidth-saving features like Paired Carrier and FastLink LDPC; the LinkGuard signal-under-carrier interference detection tool; built-in spectrum and constellation monitors; and modulation up to 64QAM.