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Thread Subject:
Matlab codes for TDMA, FDMA and CDMA

Subject: Matlab codes for TDMA, FDMA and CDMA

From: dinsefo12@yahoo.com (dinsefo)

Date: 10 Apr, 2004 11:18:32

Message: 1 of 2

Hi ,

I need a help in the performance comparison of GSM and CDMA system
with transmitter and receiver.

For CDMA,in transmitter,I generate a random data veator of (1,+1) or
(1,0), and I used 64-length Walsh code to spread them. But, here I
face a problem of how to generating a PN noise sequence. For the test
I generated 1 X 320 for Inphase-PN and 1 X 320 for Quadrature-PN, for
for 10 bit input stream.

For CDMA, in the receiver,I want to use a RAKE Receiver and correlated
with PN noise sequence.

BUT it seems the result is not right because I have a very high BER.

I wonder if any person can tell me if there are some problems with my
system as a whole(as described above)or any person can give me some
relative material for referece on simulation of CDMA fo END-to-END
with Multipath interference.

For the others of GSM (TDMA and FDMA), again I need help.

Thank you very much for your help.

Dinsefo

Subject: Matlab codes for TDMA, FDMA and CDMA

From: Chandresh Vora

Date: 12 Apr, 2004 12:04:54

Message: 2 of 2


Communications Blockset (based on Simulink) has couple of demos on WCDMA. It
also has a demo on Bluetooth, which might give you a starting point for FDMA
& TDMA.

HTH,
Chandresh


"dinsefo" <dinsefo12@yahoo.com> wrote in message news:98d74bfjfu2s@legacy...
> Hi ,
>
> I need a help in the performance comparison of GSM and CDMA system
> with transmitter and receiver.
>
> For CDMA,in transmitter,I generate a random data veator of (1,+1) or
> (1,0), and I used 64-length Walsh code to spread them. But, here I
> face a problem of how to generating a PN noise sequence. For the test
> I generated 1 X 320 for Inphase-PN and 1 X 320 for Quadrature-PN, for
> for 10 bit input stream.
>
> For CDMA, in the receiver,I want to use a RAKE Receiver and correlated
> with PN noise sequence.
>
> BUT it seems the result is not right because I have a very high BER.
>
> I wonder if any person can tell me if there are some problems with my
> system as a whole(as described above)or any person can give me some
> relative material for referece on simulation of CDMA fo END-to-END
> with Multipath interference.
>
> For the others of GSM (TDMA and FDMA), again I need help.
>
> Thank you very much for your help.
>
> Dinsefo
>

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