Forum Replies Created

    August 23, 2015 at 6:00 pm #23996
    Profile Photo
    Hager
    Participant

    the paper

    Attachments:
    1. 1-5.pdf
    August 11, 2015 at 12:07 am #23402
    Profile Photo
    Hager
    Participant

    this is screen shot of my results after modification ,there is an a problem of degradation of results of BER analyzer

    Attachments:

    1. amirasmf.png

    August 11, 2015 at 12:03 am #23400
    Profile Photo
    Hager
    Participant

    the paper

    August 11, 2015 at 12:02 am #23398
    Profile Photo
    Hager
    Participant

    This is new simulation after modifying it.

    August 5, 2015 at 10:55 pm #23217
    Profile Photo
    Hager
    Participant

    the paper

    Attachments:
    1. important.pdf
    July 25, 2015 at 1:17 am #22711
    Profile Photo
    Hager
    Participant

    the paper

    Attachments:
    1. 1569641487.pdf
    January 18, 2015 at 1:21 pm #17245
    Profile Photo
    Hager
    Participant

    I changed sampling rate in MSK to be Twice signal frequency as attached but i can’t obtained the result in this paper Figure3(c)RoF system using MSK technique

    Attachments:
    1. Project3-11.osd
    January 16, 2015 at 9:12 am #17227
    Profile Photo
    Hager
    Participant

    an error at o/p

    Attachments:
    1. Project11.osd
    January 16, 2015 at 9:09 am #17225
    Profile Photo
    Hager
    Participant

    the same error in the drawing feed back

    Attachments:
    1. Project4.osd
    January 16, 2015 at 9:06 am #17223
    Profile Photo
    Hager
    Participant

    there is an error in the drawing feed back

    Attachments:
    1. Project3.osd
    January 16, 2015 at 6:03 am #17219
    Profile Photo
    Hager
    Participant

    no o/p

    Attachments:
    1. Project21.osd
    September 3, 2014 at 2:44 am #13554
    Profile Photo
    Hager
    Participant

    Thanks Damian very much . your answers always very helpful.

    September 2, 2014 at 12:52 pm #13549
    Profile Photo
    Hager
    Participant

    Hi Damian

    my project represent one of SAC-OCDMA codes say i have 4 users with code length 12 wavelength range ( 1550-1558.8 ) to represent code with .8nm spectral width. i can’t determine the exact sample rate of white light source . i tried different value but when i increase the sample rate the performance improve. i put it 1.5 THZ and increase it to 2 THZ the performance improve to 10^-40 . i want to know how can determine the exact sample rate to every system ?? because i want to compare its performance with other codes so i want may result be logic and accurate.

    also i try another code (construction of code is different )but has the same code length but i needed to increase the sample rate more than 1.5THZ for system to make results for all users although it has the same code length as the first code but it need more sample rate
    this makes me little confused what the sample rate depend on in the system ?
    also if i want to use LED haw can i determine the bandwidth value?
    Thanks in advance

    September 1, 2014 at 7:18 am #13523
    Profile Photo
    Hager
    Participant

    say, i have 4 users in system , when i setup the light source bandwidth , i should try different value until the BER of 4 users is almost the same ? to obtain accurate system design

    August 29, 2014 at 7:00 am #13494
    Profile Photo
    Hager
    Participant

    hi domian

    when i change the bitrate from say 622Mbps to 2.5Gbps and i used bandwidth of 1.5THz for the optical source at 622Mbps. the bandwidth of optical source need to change or not when i increase bitrate ?

    for my previous question if for example my system consists of 3 users, you say i can take the individual channle BER as a first aproximation, if i take the BER from the 3 users and calculate the average value of the 3 BER is the results became more accurate ?