Rockwell-Collins Demonstrates Wideband HF Air-to-Ground Connectivity

Discussion in 'Ham Radio Discussions' started by NL7W, Aug 27, 2016.

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  1. NL7W

    NL7W Premium Subscriber QRZ Page

    I did find this interesting. Our Armed Services are renewing their interests in HF communications. This is an example why.

    ...

    Rockwell Collins first to demonstrate modernized Wideband HF air-to-ground connectivity in live flight test
    - Streaming video, real-time chat, file transfers and digital voice audio demonstrated

    CEDAR RAPIDS, Iowa (August 23, 2016)
    -An industry first, Rockwell Collins completed the complex data transfer from a C-17 airborne aircraft to a ground station over a Wideband High Frequency (WBHF) channel. Rockwell Collins collaborated with the U.S. Air Force to prove the viability of WBHF data transfer over the duration of a two-day flight, between Dover AFB Delaware and Joint Base Lewis-McChord, Washington, using a Wideband HF Receiver-Exciter configured for airborne operation.

    “WBHF is a highly reliable solution for the transfer of data, including video, and the perfect complement to traditional SATCOM communications in denied environments,” said Mike Jones, vice president and general manager, Navigation & Electronic Warfare Solutions, “The result is a low-cost replacement that leverages the platform’s current HF system infrastructure to create an HF solution with performance never before available.”

    During the demonstration, the transfer included streaming video, real-time chat, file transfers and digital voice audio. By testing the capabilities over the course of two days, teams were able to prove performance and reliability with changing variables such as environment, geographical position and time of day. During this demonstration communication links were made, and data passed over a distance of more than 1,500 miles.

    WBHF offers the highest data throughput in comparison to legacy HF and complements satellite communications, moving information quickly with the highest fidelity as possible, even in satellite-limited or denied environments. WBHF upgrades can greatly increase performance and capacity of current HF infrastructure.

    For more...

    Reference: http://rockwellcollins.com/Data/News/2016-Cal-Yr/GS/FY16GSNR48-WBHF.aspx
     
    Last edited: Aug 27, 2016
  2. K4PIH

    K4PIH Ham Member QRZ Page

    They also did it back in 2015 from fixed ground locations. WBHF is cutting edge. The federal gov't is also into HF with SHARES.
     
  3. W9WQA

    W9WQA Ham Member QRZ Page

    what chunk of ham bands may they want to take???
    theres always a motive/agenda??
     
    Last edited: Aug 27, 2016
  4. WA9WVX

    WA9WVX Ham Member QRZ Page

    I tried to read the link but the printing was way too small for my eyesight ... maybe Font 1, Geez. So now I'm wondering which mode Collins is using to pass the WBHF traffic. AM, FM, WBSSB, FDMA, TDMA, CDMA or Frequency Hopping or all of the ones I've stated.
     
  5. KO6WB

    KO6WB Premium Subscriber QRZ Page

    The PDF link in the article (which seemingly had even smaller font) alluded to a transfer rate of 90Kb/s with a bandwidth of 18KHz.
    Soooooo, the recent vacating of the HF spectrum seems to have a likely application other than amateur radio. Even our bands are within the realm of coming under scrutiny.
    There needs to be activity, not just during the contests or the rare DX flurries, but at all times.
    There are some of us that remember having a hard time finding any open frequencies even in the middle of the work week. Now, the lack of energy, in the human regard, is causing the bands to be too quiet. That makes the bands a target for "true" tactical applications.
    As a group, we appear to have forgotten the art of communication as a pastime.
    Make it a point to get on the air once per weekday, if you can, and the bands will appear just as lively as in days gone past.

    Have fun
    73
    Gary
     
    W4IOA, NL7W and KA4DPO like this.
  6. SM0AOM

    SM0AOM Ham Member QRZ Page

    This was the subject of several presentations and papers at the recent Nordic HF Conference HF16 www.nordichf.org
    Many different system design phliosophies exist for making WBHF work, ranging from the "European way" pursued by e.g. Thales and Rohde&Schwarz where transmissions on many neighbouring 3 or 6 kHz slots are combined intog
    one data stream. This has potential advantages in interference mitigation and spectrum availabliity, but puts greater demands on antenna bandwidths and equipment performance.

    Another approach is used by e.g. Harris and Rockwell-Collins where contigouous blocks of currently up to 24 or 36 kHz are filled by sub-channels that are individually
    graded for throughput and interference properties.
    This approach offers some advantages from the antenna bandwidth point of view.

    One of the leading system architects in WBHF dr Eric E. Johnson from NMSU was an invited speaker on the subject, and also participated in the concluding panel discussion
    about current HF topics moderated by dr Samuel Ritchie from the Irish spectrum Authority.

    Generally speaking the spectrum questions about WBHF are quite moot in my opinion, if the military for one reason or another feel that they need spectrum for WBHF, they will grab it...

    73/
    Karl-Arne
    SM0AOM
     
    NL7W likes this.
  7. NY7Q

    NY7Q Ham Member QRZ Page

    What was MUX back in the 50s and 60s?
     
  8. KA4DPO

    KA4DPO Platinum Subscriber Platinum Subscriber QRZ Page

    OK but 18KHZ is not exactly a huge swath of bandwidth. Also, satellite offers far greater bandwidth and signal to noise ratio than HF so unless something hits the fan taking out satellite capability the HF system is a backup. Given the governments ownership of all radio spectrum in time of war then they could take the entire HF window if they want to just like WWII. As it stands I don't think our small segments of bandwidth are really necessary under current conditions.
     
  9. KY5U

    KY5U Subscriber QRZ Page

    Imagine 18kHz or more swatches of the amateur band taken up by some jamoke watching "Jackass the Movie 13" on Netflix. Get ready, here it comes from ADS* Headquarters in Newington, a "Regulation by Bandwidth II" petition to the FCC. They're already drooling.


    *ADS = Automatic Data Stations
     
    NL7W likes this.
  10. NL7W

    NL7W Premium Subscriber QRZ Page

    Yeah... Given these latest WBHF developments, it's no wonder why the gov't bureaucrats answered the way they did -- with an unrestricted (dumb) bandwidth notion. :mad:
     

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