CrazyEngineers
CrazyEngineers
  • Vila
    Vila

    Member • Sep 3, 2008

    Coherent detector in DSSS

    Hiiii alll,


    Why must we use a coherent detector in direct sequence spread spectrum (DSSS) system? And is there possibility of us using other types of modulator and demodulator other then BPSK? Why must use BPSK modulator in DSSS?

    Thank you...
    Replies
Howdy guest!
Dear guest, you must be logged-in to participate on CrazyEngineers. We would love to have you as a member of our community. Consider creating an account or login.
Replies

  • Vila

    Member • Sep 4, 2008

    [FONT=verdana, arial, helvetica]Hiiii all,

    Why must we use a coherent detector in direct sequence spread spectrum (DSSS) system? Also why must specifically use BPSK modulator in DSSS? And is there possibility of us using other types of modulator and demodulator other then BPSK?     [/FONT]
    [FONT=verdana, arial, helvetica][/FONT]
    [FONT=verdana, arial, helvetica]Thank you...[/FONT]
    Are you sure? This action cannot be undone.
    Cancel

  • just2rock

    Member • Sep 4, 2008

    coherent detector is used to sysncronize the DSSS signals in a particular direction.Binary PSK is used in DSSS to manipulate the signal direction/phase shift.Other than BPSK ,we cant use any other form of Mod /demod.
    Regards,
    J2R
    Are you sure? This action cannot be undone.
    Cancel

  • Vila

    Member • Sep 5, 2008

    [FONT=verdana, arial, helvetica]Hiiii all

    Where is Direct Sequence Spread Spectrum (DSSS) used?? I mean the application of DSSS.

    Thank you.....    [/FONT]
    Are you sure? This action cannot be undone.
    Cancel

  • Vila

    Member • Sep 5, 2008

    Hiiiii sir,

    Thanks for the explaination. What actually an interleaver does? Why it scrambles the order of data sequence? And why we need it in an anti jam communication system?

    Thank you.
    Are you sure? This action cannot be undone.
    Cancel

  • just2rock

    Member • Sep 6, 2008

    interleaver desync the order of data send/recieve in a communication system & to do such it must be in an anti jam condt. to fulfill its rerquirement as jamming can trigger to deorder or demod the interleaver functionality.
    Regards,
    J2R
    Are you sure? This action cannot be undone.
    Cancel
Home Channels Search Login Register