A 10Gb/s Wireless Link Using a W-Band Phased Array Chipset - Page 1
Forum section: electronics / projects

author: Hugoneus
author_rank: Frequent Contributor
timestamp: July 21, 2013, 03:19:15 am
content: Dear EEVBloggers!I am the founder and host of TheSignalPath.com. Some of you have asked me about the type of work and research that I do. Although most of the things that I work on are confidential, once I publish something, it becomes public domain. I'd like to show you a picture of one of my experiments which appears in my latest Journal of Solid States publication. The title of the paper is "A 70–100 GHz Direct-Conversion Transmitter and Receiver Phased Array Chipset Demonstrating 10 Gb/s Wireless Link". Unfortunately I can't link to the paper because it is IEEE copyright material.The ICs that I have designed are a pair of transmit and receive phased arrays which operate between 70-100GHz and are intended for data communication. Using these ICs I was able to establish a 10Gb/s wireless link (16-QAM) with beam-forming. Can you identify all the equipment in the picture? O0If anyone is interested in more information, I'll answer any questions you may have.

author: marshallh
author_rank: Unknown
timestamp: July 21, 2013, 05:26:28 am
content: Real nice work. I can only understand the highest level of the RF stuff, what sort of data were you feeding the AWG?Makes this 5gbps USB 3.0 I'm working with seem simpleOK with you if I screenshot the block diagram and put it up here?

author: Hugoneus
author_rank: Frequent Contributor
timestamp: July 21, 2013, 10:21:32 am
content: Quote from: marshallh on July 21, 2013, 05:26:28 amThanks!The data from the AWG was 16- and 32-QAM constellation signals to achieve 10Gb/s data transfer.You can share any data from the paper here if you like. Which portion of the USB 3.0 circuits are you working on?

author: EEVblog
author_rank: Unknown
timestamp: July 21, 2013, 11:38:47 am
content: And the floor at the base of the tripods is covered in drool!

author: Marco
author_rank: Super Contributor
timestamp: July 21, 2013, 12:26:10 pm
content: Quote from: Hugoneus on July 21, 2013, 03:19:15 amThe subject matter of the paper is entirely beyond me ... but I am interested in why you don't put a post-print on your site? I can understand why a lot of academics don't want to bother, IEEE makes it a bloody pain in the ass ... but you are allowed and you're putting in effort to communicate about it any way.

author: HackedFridgeMagnet
author_rank: Super Contributor
timestamp: July 21, 2013, 01:15:30 pm
content: Wow nice stuff.I suppose that radio range is considered far field at 100GHz.

author: Hugoneus
author_rank: Frequent Contributor
timestamp: July 21, 2013, 05:41:42 pm
content: Quote from: EEVblog on July 21, 2013, 11:38:47 amHehe... Yeah, you should see our RF equipment!

author: Hugoneus
author_rank: Frequent Contributor
timestamp: July 21, 2013, 05:42:10 pm
content: Quote from: HackedFridgeMagnet on July 21, 2013, 01:15:30 pmYes, definitely!

author: Hugoneus
author_rank: Frequent Contributor
timestamp: July 21, 2013, 05:42:46 pm
content: Quote from: Marco on July 21, 2013, 12:26:10 pmI can link to the IEEE website, but you would have to have IEEE subscription to view the paper itself.

author: Aeon
author_rank: Contributor
timestamp: July 21, 2013, 06:06:52 pm
content: please link to the siteI can read it at my university they have a subscription for their students

author: Marco
author_rank: Super Contributor
timestamp: July 21, 2013, 06:10:41 pm
content: Quote from: Hugoneus on July 21, 2013, 05:42:46 pmThat's not what I meant, you're allowed (with the right disclaimers and citations etc etc.) to publish the accepted version (ie. before final editing/formatting for publication) of your paper on personal, institutional and non commercial archival sites. As far as I can surmise from the IEEE website most of their journals even prepare a special version of the accepted paper with DOI references expressly for that purpose which you can download from the author portal (dunno if this is true for the journal in question).

author: marshallh
author_rank: Unknown
timestamp: July 21, 2013, 06:38:19 pm
content: IEEE make the authors pay $1750 for the privilege of letting the world see their work on the IEEE site. There are methods to get around the paywall, just think a bitBlock Diagram:QuoteQuoteQuoteQuote from: Hugoneus on July 21, 2013, 10:21:32 amI'm writing a FPGA MAC/Link layer controller, talking to a bare metal PHY that does serdes,8b/10b. All digital though. It would be crazy to see it move to wireless..

author: Unknown
author_rank: Unknown
timestamp: July 21, 2013, 10:08:06 pm
content: Wonderful work!Is the adjustable antenna phasing apart of what gives you the 10Gb/s or is the 10Gb/s just down to fact that you have GHz of RF bandwidth/spectrum up at 100GHz to play with?

author: Hugoneus
author_rank: Frequent Contributor
timestamp: July 22, 2013, 03:55:17 am
content: Quote from: Pippy on July 21, 2013, 10:08:06 pmThe independent phase control of each antenna element enables beam forming in space so the radiation pattern can be controlled in one dimension.At 100GHz, there is a lot of bandwidth to go around. The difficulty is designing circuits which have sufficiently low noise figure and high linearity, RF/IF bandwidth to support 10Gb/s operation. Since this is double side band transmission with complex modulation, I/Q accuracy and calibration is also critical.

author: mark03
author_rank: Frequent Contributor
timestamp: July 22, 2013, 05:27:10 pm
content: Quote from: Marco on July 21, 2013, 06:10:41 pmTHIS!!!Not to hijack the thread, but I would like to take this opportunity to plead with all IEEE authors topleaseplace a copy of your accepted paper(s) on your personal web site, or somewhere else where google can find it and anyone can read it. All of my publications are freely available this way, it's perfectly legal, and the world will be a better place if everyone follows suit. Think of it as a stop-gap measure until the govt gets around to doing their job, i.e. mandating open access for all federally funded work.Full disclosure: although I am published in IEEE journals, I am no longer a member, even though my company would pay the dues. I will re-join as soon as members automatically gain access to the IEEE Digital Library. Gotta take a stand somehow.