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Recent content by Enhancer

  1. Enhancer

    Problem with following Proakis's Digital Communications

    Re: Proakis No, I do not think so. only try to read it carefully and to translate every part in each formula by its corresponding block in the diagram atached with each one. and also try to find a suitable reasoning for each block.. That's all BTW: you might not be able to study digital...
  2. Enhancer

    allocation of frequency

    Dear Fahad I think it is not an applicable case of planning, as each company is working for its benefits and losing one of its channels to the other company is not an economical issue. But any way if we assumed that can happen, all what you need is to configure your BTS with the new frequency...
  3. Enhancer

    What are the GSM specifications?

    Re: GSM Spec. Dear paramsam, there is too difficult to determine a clear and constant specs for GSM or any othe comm. system. But there are a general specs that could be mentioned as: - the up/down link band is about 25 MHz (bands are 800, 900, 1800, 1900 MHz) - the GSM channel BW is 200 KHz...
  4. Enhancer

    GSM900 - frequency “reuse pattern“

    Re: GSM900 - frequency “reuse pattern“ Thanks Ibrahim very much....
  5. Enhancer

    What is full diversity?

    Dear honhungoc your quetion is very general and carry alot of meanings. Could you explain your question more?
  6. Enhancer

    GSM900 - frequency “reuse pattern“

    Re: GSM900 - frequency “reuse pattern“ Dear Ibrahim could you tell me the meaning of these numbers? Do you mean, for example, 3/9 i.e. 3+3+3 ? Is this true? Thanks
  7. Enhancer

    pn sequence generator?

    pn sequence generator circuit the code of a pn sequence is simply apolynomial, see this table: so the code is very simple...
  8. Enhancer

    pn sequence generator?

    circuit diagram of pn sequence generator You can generate PN sequence by using shift registers, see the diagram: where h can be either 1 (short circuit) or 0 (open circuit) and x's are the shift registers... if helps, press helped me
  9. Enhancer

    network practical prob .

    Switch is enough in case of making LAN only and you will not going to access the internet by any way... Router is needed in case of getting access to the internet as it is an essential stage before getting into the Web, as the router can read up to layer 3 which switch can not.
  10. Enhancer

    Where is data link layer used?

    Re: data link layer The meaning is come from a fact that: Switch, can encapsulate the data up to layer 2 "DATA Link Layer" Router, can encapsulate the data up to layer 3 "Network Layer" and so, on the level of the LAN, the only needed is "switch", which means that the devices in the LAN will...
  11. Enhancer

    About the differential amplifier!

    Will this make a difference? it is just a big value.
  12. Enhancer

    How to design higher order bandpass filter using only L,R,C?

    Re: How to design higher order bandpass filter using only L, the circuit is very simple, that is by putting R in parallel with (C parallel to L): Fc=1/sqrt(LC) and the band pass width will be determined by the quality factor of the resonance circuit "Q" which is fn(R) But this will give you...
  13. Enhancer

    Vcontrol of the VCO. How?

    I see that no problem having Vfine negative... it is not a condition that the control volt is positive....an example of that, consider an FM modulator, so you will use that VCO and the control volt is a biopolar signal (sinusoidal or triangular)...
  14. Enhancer

    Looking for code for cdma forward link traffic channel

    Re: cdma forward link what code do you mean?.....please clarify your request.
  15. Enhancer

    Establishing a VPN between two PCs

    Re: Establishing a VPN Check this links: **broken link removed** http://compnetworking.about.com/cs/vpnsetup/

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