3 ms·
10G-baseT ethernet uses 128-DSQ modulation (LDPC coded). It's 128 symbols sent over 2 cycles. These complex modulations have a huge drawback though: latency. Y
by bgnn 3y ago
10G-baseT ethernet uses 128-DSQ modulation (LDPC coded). It's 128 symbols sent over 2 cycles.
These complex modulations have a huge drawback though: latency. You need to pack, ramdomize, encode and modulate at the transceiver, and undo all these + equalization at the receiver. Especially feed-forward equalization is a huge latency source.
- silvestrov 3y agoSome numbers here: https://wavesplitter.com/technical-column/latency-and-power-consumption-of-10gbase-t/ https://wavesplitter.com/technical-column/latency-and-power-... > Cable latency is about 5ns/m, so 2.6 µs is equivalent to latency of a 520m cable. This latency might become a big issue for the HPC-based applications.
- bgnn 3y ago10GBASE-T is rated up to 300m cable. I don't think these numbers include 300m cable latency. It's just the PHY latency itself.