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  • MadMan007 - Tuesday, February 26, 2013 - link

    Article needs more acronyms! Reply
  • JeffFlanagan - Tuesday, February 26, 2013 - link

    Acronyms aren't a problem, but the author failed to define them, making the article gibberish. Reply
  • tunaman - Tuesday, February 26, 2013 - link

    Some customers may ditch them for this chip?

    https://url.odesk.com/~44f2nc
    Reply
  • UzairH - Tuesday, February 26, 2013 - link

    The fudge does some cheaparse speaker-grille Chinese website have to do with radio modems?
    Am so sick of these annoying advertisers on EVERY forum on the interwebz.
    Reply
  • jamyryals - Tuesday, February 26, 2013 - link

    Any announced design wins for it yet? Reply
  • FaaR - Tuesday, February 26, 2013 - link

    "ST-E believes its modem architecture in M7450 is very different from traditional designs, as it leans more towards being an SDR than most."

    ...Wut? :P
    Reply
  • lever_age - Tuesday, February 26, 2013 - link

    ST-E = ST-Ericsson = joint venture of companies STMicroelectronics and Ericsson
    M7450 = new baseband chip (brains and workhorse behind sending / receiving data; the part other than the actual antenna and amplifier hardware)
    SDR = software-defined radio; this generally means that more of the functionality is being implemented in software / firmware on more flexible hardware, rather than fixed-function hardware blocks -- some advantages could be reusing hardware components when switching between different technologies (just load up different instructions), and so on

    So some company claims to have a new wireless communications chip that's more flexible and advanced than others on the market.
    Reply
  • ganfuj - Monday, March 11, 2013 - link

    if M7450 is just the baseband chip, what did they use for teh transceiver for the demonstration?

    It is the transceiver that is more challenging. Until they have a companion transceiver doing the CA (carrier Aggregation ) this is just marketing piece.
    Reply
  • Zink - Tuesday, February 26, 2013 - link

    And: "M7450 of course supports 5+10 and 5+5 aggregation"
    Are there maybe a few hundred people in the world that would know that a new baseband from ST-Ericsson "of course" supports whatever that is? Brain writes and says "of course", "interestingly enough" and "you know..." without explaining what he means probably a bit too often but it makes me feel smart when I understand what he is trying to get at.
    Reply
  • lever_age - Wednesday, February 27, 2013 - link

    I'd never heard of this baseband or most basebands in general (and I don't too much follow industry wireless technologies), but near the top of the article, it's stated that 10 MHz + 10 MHz carrier aggregation is supported. That's probably referring the bandwidth used at a given carrier frequency. Actually, I'm not sure if I've ever heard of "carrier aggregation" as a terminology, but it's not too much of a stretch to have heard of that or to infer that it means to use multiple carriers simultaneously.

    If it supports 10 + 10, then it's not much of a stretch to understand what 5 + 10 and 5 + 5 mean in this context (5 MHz as opposed to 10 MHz bandwidth, which just means a lower signalling rate... or is this some OFDM system and it's just using less subcarriers? probably). See the second box in the second picture. IIRC these things usually support either 10 or 5 (so to speak), so if it can do 10 + 10, it can do the other easier combinations too.

    All that said, I agree that this is a rather hastily-written article with too much jargon and not enough explanations, even for Pipeline. I'm definitely going to admit that being an EE grad student in communications helps me out here.
    Reply
  • evonitzer - Wednesday, February 27, 2013 - link

    I was happy to read it and look up acronyms. They're all on wikipedia people! It's coverage of something new coming from MWC -- oh sorry, Mobile World Congress -- and might start turning up in devices. Listen to the podcast too. Brian continually talks about these topics on the show.

    EE Grad student in communications, but you don't do wireless? Well, I guess that's not crazy, but it seems you would have taken a class or two along the way.

    TDD - Time Division Duplexing, multiplexing the uplink and downlink in time.
    FDD - Frequency Division Duplexing. Same, but with frequency.
    3GPP - 3rd Generation Partnership Project. The standards board for a lot of wireless tech.
    VoLTE - Voice over LTE. Exactly what it sounds like. Currently voice goes over 3G or 2G, but VoLTE allows it to go through LTE too.
    WCDMA/GSM - Wideband Code Division Multiple Access. We know this, right? AT&T, T-Mobile, and lots of others use it for signals.
    TD-SCDMA - Time Division Synchronous Code Division Multiple Access - Never heard of it, but China uses it instead of WCDMA.
    FD-SOI - Fully Depleted Silicon on Insulator - No idea, but it sounds great, right?

    Ok, maybe it is a little out of control. Better than no coverage at all though!
    Reply
  • lever_age - Wednesday, February 27, 2013 - link

    I wasn't so clear earlier.

    My research is in wireless (which in our program doesn't require a single class dedicated to wireless channels and concepts, and definitely none on current wireless standards; digital communications / coding / information theory are the fundamentals anyhow), but I don't really keep up with current wireless industry standards and acronyms. The ones like TDD, FDD, and CDMA are engineer-speak, but some of the trade names and standards names are of course not. Then again, maybe I should keep up to date. Many recent M.S. graduates are at Qualcomm and so on, after all.

    Now, you have more dedication than me for some of this alphabet soup.
    Reply
  • ludwigbo - Wednesday, February 27, 2013 - link

    what Francis answered I'm amazed that a mother can get paid $5511 in 4 weeks on the computer. have you seen this web page BAM70.com Reply
  • bakedpatato - Wednesday, February 27, 2013 - link

    If the baseband is SDR-lite(which is quite cool,SDR is really taking off), does that mean that the Skyworks amp there is amplifying signals in the 2/4/5/13/7 bands? That seems rather impressive as well.

    Also, TMOUS is doing AMR-WB over WCDMA. Does their implementation use IMS as well?
    Reply
  • anat17 - Tuesday, March 05, 2013 - link

    I was wondering if we use TDD instead of FDD, will we still get 150 Mbps on Cat.4 device? Reply

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