editor's blog
Subscribe Now

Qualcomm Plugs In @ Home

It almost sounds too good to be true. You plug in your new connectable gadget, and not only do you get power, but you’re also connected to high-speed data with no further wires.

People have talked about using home electrical wiring for communicating for a long time, but it doesn’t seem to have gotten much traction – at least not in the US. (Ok, not that I’ve noticed, anyway.) Given the big clunky unshielded wiring, I’ve more or less assumed (without really thinking about it) that they weren’t up to the high-data-rate tasks that we all count on now.

Wrong. Or so say the folks at Qualcomm. Yes, Qualcomm. I know, we think phones and wireless and unplugged with those guys, but their Atheros group has apparently been paying attention to things both wired and plugged. They’ve announced an SoC that supports HomePlug AV2, supplementing existing chips already available. This new QCA7500 gets them above gigabit speeds.

What’s unique about HomePlug is that it can support both narrowband (for Internet of Things) and wideband (for HD video or high-speed internet). The Qualcomm chip supports gigabit data throughout the house; no Cat 5 needed.

What really caught my attention was MIMO. MIMO? Really?? Like, beamforming WiFi sort of thing, with multiple antennae? On… a wire??   O_o

Well, it’s true. But it works only on three-plug systems. Both the live and neutral are used as channels; 2×2 is the only possible configuration. (And it ain’t going to work if your contractor or builder faked out the three-plug thing for the inspector without actually grounding it throughout the house…) SISO is, of course, also supported.

If you have a really big house, you can even use repeaters. Which, of course, would inject a repeated signal in all directions, slightly delayed from the original. Apparently that latency is very low, and doesn’t create an issue for receiving devices trying to capture a clean signal.

When I think of the equipment needed to deploy this technology, I think of stuff that you can go buy at Fry’s to install. And for new construction with clean, grounded wiring, in particular in the US, that’s a possible model. Just like we do with WiFi in our houses.

But there’s another model: the managed one. In this case, your high-speed data carrier actually does the installation and manages the network remotely. This has been done in old houses in Europe (where I would guess the after-the-fact wiring might be sketchier). Qualcomm actually seems more highly focused on this model.

To be clear, they don’t think this will supplant wireless; they see the two working in concert. In fact, it just occurs to me… for folks like me using a cable connection, the wireless router (which is wired to the cable modem, if not outright integrated with it) has to be near the cable connection, which may not be near where you want the signal. So you could run the signals on the power line and have the WiFi router pick it up elsewhere in the house for a stronger signal where you need it. (Why use WiFi when you have HomePlug? Well, for smartphones, for example… they’re not plugged in.)

As to the cost of this technology, they don’t see it as being a huge issue – unless we end up with too much proliferation of interfaces and protocols. If the industry can rally around a few, it should be OK.

You can learn more about Qualcomm’s chip in their release.

Leave a Reply

featured blogs
Dec 8, 2022
You will notice a big change when you try to download the latest version of Innovus, Genus, or Joules on our Cadence download site, downloads.cadence.com . Instead of the expected INNOVUS221 or GENUS221, or JOULES221 releases, you will find DDI221, which includes the 22.1 ver...
Dec 7, 2022
We explore hyperscale datacenters & internet traffic's impact on climate change and discuss how energy-efficient system design shapes a sustainable future. The post How the Electronics Industry Can Shape a More Sustainable, Energy-Efficient World appeared first on From ...
Dec 7, 2022
By Karen Chow When Infineon needed to select a field solver for the development of their next-generation power semiconductor products,… ...
Nov 18, 2022
This bodacious beauty is better equipped than my car, with 360-degree collision avoidance sensors, party lights, and a backup camera, to name but a few....

featured video

TI isolation technology: Different by design

Sponsored by Texas Instruments

The need for isolation is growing, and while electromechanical relays, optocouplers and discrete transformers have been widely adopted for signal and power isolation, we're committed to pushing isolation technology further. See where we’re taking our capacitive and magnetic technologies next.

Learn More

featured chalk talk

Twinax Flyover Systems for Next Gen Speeds

Sponsored by Samtec

As the demand for higher and higher speed connectivity increases, we need to look at our interconnect solutions to help solve the design requirements inherent with these kinds of designs. In this episode of Chalk Talk, Amelia Dalton and Matthew Burns from Samtec discuss how Samtec’s Flyover technology is helping solve our high speed connectivity needs. They take closer look at how Samtec’s Flyover technology helps solve the issue with PCB reach, the details of FLYOVER® QSFP SYSTEM, and how this cost effective, high–performance and heat efficient can help you with the challenges of your 56 Gbps bandwidths and beyond design.

Click here for more information about Twinax Flyover® Systems for Next Gen Speeds