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240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

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Re: 240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

#11

Post by kennethrc »

moreati wrote: post #5
kennethrc wrote: post #2

Apropos of absolutely nothing, but IIRC a "Star Trek" movie where a screenshot of one of the displays on some ship or another had the Shields Frequency up which allowed the enemy to match it and disable it, and back in the 80s(?) when this came out I remember thinking "237GHz" (or something like that) was an insanely high frequency and doubted it could ever be reached with any degree of stability. Physics: HMB

I thought it might be Generations, but that was 257.4 MHz https://www.youtube.com/watch?v=6A9IZHWz45Q&t=20s

That's the scene. Says it's from 1994.

After that, I'm sure the Owner's Manual that comes with your new Enterprise-class Starship now has a "DO NOT DISPLAY YOUR SHIELD FREQUENCY" in the "Warnings" section

Re: 240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

#12

Post by NavinF »

JohnnyD10 wrote: post #4

When incorporated into Wifi 18 in the year 2046, it will prove to realistically get around 500 MB/s, and have a hard time getting through most walls.

Jokes aside, I get a consistent 1600mbps over wifi 6E which is good enough for me.

Of course you need an AP in every room to get consistent performance, but wifi has always been like that. And unless your applications use forward error correction wifi will always have latency spikes from L2 retransmission if there's even one wall between the AP and device

Re: 240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

#13

Post by [deleted] »

aDfbrtVt wrote: post #7

Something not totally clear from the title, but it seems the claimed rate was actually achieve with a transmitter structure similar to what you would find in coherent optics (see figure 4). Instead of coupling to fiber, they couple to a high speed photodiode that radiates at the ~140GHz laser wavelength. EDIT: Noticed that after a closer reading of the paper, the real goal was to assess the LO phase noise improvement…

[deleted]

Re: 240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

#14

Post by toastedwedge »

NavinF wrote: post #12
JohnnyD10 wrote: post #4

When incorporated into Wifi 18 in the year 2046, it will prove to realistically get around 500 MB/s, and have a hard time getting through most walls.

Jokes aside, I get a consistent 1600mbps over wifi 6E which is good enough for me. Of course you need an AP in every room to get consistent performance, but wifi has always been like that. And unless your applications use forward error correction wifi will always have latency spikes from L2 retransmission if there's even one wall between the AP and device

If I may ask, what is your hardware setup like if you're achieving consistent 1.6Gbps? Is that a reproducible, every day speed? Is that only for LAN or both LAN+WAN?

Re: 240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

#15

Post by glitchc »

NavinF wrote: post #12
JohnnyD10 wrote: post #4

When incorporated into Wifi 18 in the year 2046, it will prove to realistically get around 500 MB/s, and have a hard time getting through most walls.

Jokes aside, I get a consistent 1600mbps over wifi 6E which is good enough for me. Of course you need an AP in every room to get consistent performance, but wifi has always been like that. And unless your applications use forward error correction wifi will always have latency spikes from L2 retransmission if there's even one wall between the AP and device

An AP in every room, incorporated into the light fixture. Sounds like a business model just waiting for some funding.

Re: 240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

#16

Post by genpfault »

JohnnyD10 wrote: post #4

When incorporated into Wifi 18 in the year 2046, it will prove to realistically get around 500 MB/s, and have a hard time getting through most walls.

> have a hard time getting through most walls.

Dial up the TX power.

Re: 240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

#17

Post by ijhuygft776 »

NavinF wrote: post #12
JohnnyD10 wrote: post #4

When incorporated into Wifi 18 in the year 2046, it will prove to realistically get around 500 MB/s, and have a hard time getting through most walls.

Jokes aside, I get a consistent 1600mbps over wifi 6E which is good enough for me. Of course you need an AP in every room to get consistent performance, but wifi has always been like that. And unless your applications use forward error correction wifi will always have latency spikes from L2 retransmission if there's even one wall between the AP and device

> wifi has always been like that

not for me

Re: 240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

#18

Post by notso411 »

glitchc wrote: post #15
NavinF wrote: post #12

Earlier quoted context omitted.

Jokes aside, I get a consistent 1600mbps over wifi 6E which is good enough for me. Of course you need an AP in every room to get consistent performance, but wifi has always been like that. And unless your applications use forward error correction wifi will always have latency spikes from L2 retransmission if there's even one wall between the AP and device

An AP in every room, incorporated into the light fixture. Sounds like a business model just waiting for some funding.

Already exists

Re: 240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

#19

Post by matsz »

NavinF wrote: post #12
JohnnyD10 wrote: post #4

When incorporated into Wifi 18 in the year 2046, it will prove to realistically get around 500 MB/s, and have a hard time getting through most walls.

Jokes aside, I get a consistent 1600mbps over wifi 6E which is good enough for me. Of course you need an AP in every room to get consistent performance, but wifi has always been like that. And unless your applications use forward error correction wifi will always have latency spikes from L2 retransmission if there's even one wall between the AP and device

If you live in a small/medium apartment then 6E is quite good. I've been using one of those "enterprise" tri-band APs for around a year and my experience has been also amazing, with just one AP in the entire flat.

Enabling all bands should allow your device to just drop to 5GHz/2.4GHz when needed. This has been seamless for me.

Re: 240-Gbit/s sub-THz wireless communications using ultra-low phase noise receiver

#20

Post by xattt »

JohnnyD10 wrote: post #4

When incorporated into Wifi 18 in the year 2046, it will prove to realistically get around 500 MB/s, and have a hard time getting through most walls.

> … have a hard time getting through most walls.

Thankfully, the Class Wars of 2037 has caused most of society to move into tents, so signal penetration through walls was no longer an issue.

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