4 ms·
You can pack many bits into a constellation point. Think 1024 QAM.
by e2phd 10y ago
You can pack many bits into a constellation point. Think 1024 QAM.
- walrus01 10y agoMost new licensed band 6, 11, 18, 23 GHz radios these days are 1024QAM capable. For 80 GHz the hot new thing is radios capable of 16/64/256QAM at varying code rates.
- Dwolb 10y agoWhat's the limiting factor when designing to a constellation? Otherwise, what's improved about the chip or firmware to be able to move from 256QAM to 512QAM?
- walrus01 10y agosignal/noise ratio is a big one and RSL level. There are even 4096QAM radios now but they need a signal like -51 to operate at their full modulation. Otherwise they ACM down to 1024 (around -62), 256 and then 64QAM.
- Dwolb 10y agoWhat's the limiting factor when designing to a constellation? Otherwise, what's improved about the chip or firmware to be able to move from 256QAM to 512QAM?
- ArkyBeagle 10y agoThat's a pretty narrow ledge to stand on @ 800 GHz. Wonder what the FEC regime is?