Some Noob questions

Discussion in 'Wireless & RF Design' started by bobo01, Apr 17, 2013.

  1. bobo01

    Thread Starter New Member

    Apr 17, 2013
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    I am just starting to learn about RF.

    Could someone tell me what a Digital Front End ( DFE) and a Field Programmable Gate Array is (FPGA)? Or links where I could learn more.

    Also why does the signal from a DFE need to be linear?

    Thanks for any help.
     
  2. WBahn

    Moderator

    Mar 31, 2012
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    Here's an idea: Use Google (or some other search engine) and search for, oh, perhaps "Field Programmable Gate Array".

    Then repeat this process searching for, perhaps, say, "Digital Front End".

    Look through what pops up there and then come back armed with whatever knowledge you gain and ask some more specific questions.
     
  3. bobo01

    Thread Starter New Member

    Apr 17, 2013
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    Why does the signal from a DFE need to be linear when used with RF?
     
  4. WBahn

    Moderator

    Mar 31, 2012
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    Look a bit more generally for why linearity is important in many RF applications.
     
  5. vk6zgo

    Active Member

    Jul 21, 2012
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    "Digital front ends" normally digitise the RF spectrum they are designed for,directly--the signal is then digitally processed to produce the functions normally performed in a conventional receiver,such as tuning,filtering, detection,AGC,etc.

    It was my impression that the output of these "front-ends" were still in raw digital format,where I would expect that linearity would not be a major problem.
    If,however,they have used something other than simple two level data,such as a multi-level,multiphase method like that used for digital television signals,linearity may well be important.

    As I am basically an analog person,I can't really add anything else useful.
     
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