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define internal parts of bts

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  • #42067 Reply
    jitendra
    Guest

    sir,
    define internal parts of BTS

    #42068 Reply
    pary
    Guest

    generally:
    it contain three main level.
    1) Antenna coupling level, diff name for it from diff vendor(ANT or CDU……) but mainly it contain (tx combiner+duplexer tx/rx+ rx spliter+ rx,tx filter+ LNA+VSWR detection)
    2) TRX level (coder & decoder+channel coding & decoding + VSWR supervission + modulation schame (GMSK or 8PSK)and each trx contain 8Ts)each module is integrated with differ feature(HR,FR,EFR,FH,diversity & some ciphering algorithm)& also handling radio signaling link protocol.
    3) Base station function level (it mainly performed by central prosesing unit(SUMA or DXU ….as the vendor define)SO it Generating the clock (internal or syncoronise with external clock), Hndling A-bis TX, Ensuring O&M, Handling OML,Qmux(transimission protocol..& some else control function as the vendor.

    #42069 Reply
    more
    Guest

    Hi
    what is the diffrent between LNA (low noise amp) and TMA (tower mounted amp)& which way they support UL or UL+DL .
    thanks

    #42070 Reply
    Patrick
    Guest

    we use LNA, they support UL + DL.

    for exemple, we use this:

    http://www.selecom.fr/index.php3?famille=3&rub=12&langue=ENG

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