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For example, current Homeplug AV2 500-Mbit/s powerline Ethernet devices use 1024-QAM and 4096-QAM, [4] as well as future devices using ITU-T G.hn standard for networking over existing home wiring (coaxial cable, phone lines and power lines); 4096-QAM provides 12 bits/symbol.
Some vendors offer a non-standard 1024-QAM mode, providing 25% higher data rate compared to 256-QAM Other elements/features Beamforming with standardized sounding and feedback for compatibility between vendors (non-standard in 802.11n made it hard for beamforming to work effectively between different vendor products)
This brings better spectrum use, improved power control to avoid interference, and enhancements like 1024‑QAM, MIMO and MU-MIMO for faster speeds. There are also reliability improvements such as lower power consumption and security protocols like Target Wake Time and WPA3.
The following are core features that have been approved as of Draft 3.0: 4096-QAM (4K-QAM) enables each symbol to carry 12 bits rather than 10 bits, resulting in 20% higher theoretical transmission rates than WiFi 6's 1024-QAM.
Downlink LTE: LTE Category 22 (2500 Mbit/s). 7x20 MHz carrier aggregation. Maximum 24 spatial streams. Up to 1024—QAM. Up to 4x4 MIMO on five carriers, Full-Dimension MIMO (FD-MIMO) Uplink LTE: LTE Category 13 (316 Mbit/s). 3x20 MHz carrier aggregation. Up to 256-QAM; TSMC 7 nm FinFET process; Chipsets: Snapdragon X55 5G Modem
IEEE 802.11-1999 also introduced the binary time unit TU defined as 1024 μs. [9] At least seven different, ... (1024-QAM) 30 m (98 ft) 120 m (390 ft) [F] 40
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A constellation diagram for rectangular 16-QAM The constellation as received, with noise added Spectrum analyzer software using different views to show a QAM 4096 constellation diagram The number of constellation points in a diagram gives the size of the "alphabet" of symbols that can be transmitted by each sample, and so determines the number ...