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In-building solutions

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  • #43324 Reply

    Dear All,

    Who ever wanted to know about In-building solutions in a GSM/ CDMA operators please refer to the below site. It gives you the best understanding.

    You can also post in your doubts & share your infos on IBS. Mail me at

    #43325 Reply

    Hi Shekar,

    I am also into in-building soltuions at the moment, will go through your site

    #43326 Reply
    Da Architect

    Hello In-building RF Engineers,

    I am recently deploying in-building solutions. And I look forward to exchange information.

    #43327 Reply

    Hi, anyone here more knowledgeable about IBS? Can I ask some queries to solve my problem?
    I plan to have a design with common DAS with multiple frequency band.
    How can I combine 1 operator with GSM 900 frequency, 2 operators with dcs 1800 frequency and 3operators with umts 2100 frequncy in one system? thank you

    #43328 Reply


    well, it is always possible to combine 900 1800 and 2100 onto one antenna system (using a triplexer 3 -> 1 and a triband antenna)

    The main problem is going to be combining the operators using the same band. That requires using a combiner (-4dB loss for 2 inputs (=2 operators 1800 in your case), -5dB loss for 3 inputs (= 3 operators 2100 in your case) )

    depending on how many floors you must cover, the biggest choice is to use “analog” transmissions, or “optical” transmissions (or digital).
    If analog : you’l probably need some amplifiers on the way, because feeder losses are gonna take their toll !)
    If optical : you’ll need A/D and D/A convertors. It is the most expensive solution, obviously.

    Visit RFS website, they can give you some good ideas, i suppose.

Viewing 5 posts - 1 through 5 (of 5 total)
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