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Recent content by esfahanianboy

  1. E

    What is the difference between OFDM and Precoded OFDM?

    Re: OFDM Difference... precoded OFDM maintains orthogonality without adding cyclic prefix but by Channel state information at transmitter.
  2. E

    umts/wlan integration practical implementation

    wlan and umts integration usually there is a free version for universities.
  3. E

    request:An idea for graduating research

    I suggest working on sensor networks
  4. E

    frequency synchronization of OFDM wireless systems

    OFDM communication standard frames contain preamble which can be used for synchronization. Simply there are tow similar priambles in the frame, calculate phase difference of these preambles and divide by preamble duration
  5. E

    What is the Software Defined Radio (SDR)?

    Re: SDR I usually do not recommend implementation as academic project. you can work on sdr using Dr. Mitola book. Software defined radio, An objec oriented ...
  6. E

    How Home Zones are implemented in mobile communications?

    Re: Home Zone I think it relates to the data bases
  7. E

    What is space diversity and spatial multiplexing?

    Re: Diversity..... Wireless communication, Tse, .. is the best ref on the topic
  8. E

    Modulation method in 2G and 3G

    2g modulation try wikipedia for such general questions
  9. E

    Decoder techniques.....

    Are these decoding or equalization techniques???
  10. E

    Help with QPSK Measurements!

    yes, it is correct. But BER measurement is also usefull
  11. E

    umts/wlan integration practical implementation

    opnet 15 umts wlan model tey OPNET, it has both wlan model and umts, u need only to integrate them
  12. E

    What is spatial multiplexing ?

    Re: MIMO ... What is spatial multiplexing ? MIMO data rate = (spatial multiplexing) * SISO Data Rate Difference between Flat fading and Frequency selective fading? Flat Fading: Channel Freq. Response is flat over signal bandwidth. So all frequencies encounter the same gain. Freq. Selective...
  13. E

    How to measure the Eb/No of a digital BPSK signal ???

    bandwidth of bpsk signal Every communication receiver has limitted bandwidth that determine the amount of noise get into the system. in theory the Receiver bandwidth is the minimum possible bandwidth of the transmitted signal. In practice transmiiter filter has special form that prevent...
  14. E

    need help in down sampling

    you can check it in matlab using "resample" function
  15. E

    How calculate mean square power of an OFDM symbol wth CP?

    Re: How calculate mean square power of an OFDM symbol wth CP You can calculate power both in frequency domain or time domain. but the prefered method is in time domain (i.e. after IFFT) . In simulink you may use square and moving average to calculate the signal power.

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