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aDfbrtVt

HN member
Joined
Sat, Nov 03, 2018, 4:59 PM UTC
HN karma
305
Public activity
92 items

About aDfbrtVt

Optical Communications DSP Engineer

Recent public activity

  1. comment
    Comment #44575595

    Depending on phase matching criteria of lambda's on a given core, I would mostly agree that various wavelengths are not significantly coupled. I also agree there are a different po…

  2. comment
    Comment #44574989

    To get a ballpark power usage, we can look at comparable (for some definition thereof) commercial offerings. Take a public datasheet from Arista[1], they quote 16W typical for a 40…

  3. comment
    Comment #44574780

    As others have mentioned, this is mostly a proof of concept for a high core count weakly-coupled fibre from Sumitomo. I also want to highlight the use of a 19 channels MIMO receive…

  4. comment
    Comment #39223913

    I can think of a number of cases where using a hard decision decoder can be a better choice. Power would be one factor and I would strongly disagree that the power delta between so…

  5. comment
    Comment #39220587

    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 f…

  6. comment
    Comment #39063152

    FYI, they recently removed the annual RRSP admin fee. https://www.interactivebrokers.ca/en/index.php?f=rsp_tfsa_in...

  7. comment
    Comment #38503855

    Quick correction - not repeaters but amplifiers. The term repeater is commonly used to refer to a device that demodulates and remodulates a signal.

  8. comment
    Comment #37199541

    Why so many taps? That's north of 2 seconds.

  9. comment
    Comment #36345315

    What is "reliable" though? All digital systems will undergo some rate of correctable/uncorrectable errors, it just depends on what you consider to be an acceptable rate of failure …

  10. comment
    Comment #36120846

    That may hold for a trivial device or a perfectly spec compliant device. However, the former is not interesting and the later does not exist. I agree that more test coverage would …

  11. comment
    Comment #35989385

    I fail to see how you could "disrupt" something like cooling solutions in the way I believe your post implies. First, the ability to remove large volumes of heat from a DC (or anal…

  12. comment
    Comment #35940855

    I would argue the FFT algorithm is much more important in communication systems than the Viterbi algorithm. There are plenty of powerful Forward Error Correction schemes that do no…

  13. comment
    Comment #35940831

    Fun fact, Golay codes are the only perfect code outside of Hamming codes. Perfect codes are interesting in that the Hamming bound becomes an equality, effectively saying that the d…

  14. comment
    Comment #35539754

    Looks like Intel 4nm will only start shipping 2023H2. I'm not sure I see Intel 2nm shipping less than 6 months later, especially given Intel's recent history of stumbling on execut…

  15. comment
    Comment #34969458

    I mean yes and no? Kalman filters fuses information about known system behaviour along with observations in an optimal predictor (for certain types of noise). It uses a matrix in t…

  16. comment
    Comment #34656749

    I have had this page bookmarked for years, hopefully you find it as useful as I do. It is a formal yet digestible treatment of floating point numbers. https://docs.oracle.com/cd/E1…

  17. comment
    Comment #34498830

    I see, the reduction of antenna gain with terminal miniaturization makes sense. I didn't know if the noise figure of a GaN amplifier was worse. Why would a change in the antenna ra…

  18. comment
    Comment #34498208

    What aspect of migrating to GaN PA's degrades the link budget for this application?

  19. comment
    Comment #34469029

    To further reinforce the above argument, many environments dominated by Matlab have their instrument control software written in Python. Mathworks have made it pretty easy to call …

  20. comment
    Comment #34381642

    Picard has worked really well for me. https://picard.musicbrainz.org/

  21. comment
    Comment #34187264

    Very likely there will be a 1.6T DR4 module in QSPFP-DD/OSFP form factor before 2030 that targets data center interconnects (< 120km). The technology (mostly) exists at this point,…

  22. comment
    Comment #32782080

    I don't see much partisanship in this comment section, mostly people discussing the O&G amortization schedules. I agree that, in general, it would be better if HN had less politica…

  23. comment
    Comment #31988373

    Add the following lines to your sway config. It works for me when using Waybar. exec_always --no-startup-id blueman-applet exec_always --no-startup-id nm-applet --indicator

  24. comment
    Comment #31716931

    I would not wish Matlab GUI programming on my worst enemy. I disagree with your assertion that documentation for Python is typically much better. Take a randomly chosen function I …

  25. comment
    Comment #31716456

    I agree with you for the most part, I write this while running Matlab simulations in the background. Having tried to reach similar levels of productivity with Julia or Python, I fi…