Hi Nishchal,

i did the same project in the last mid year

vacation ... i remember that when i made the freuency

selective we made random generation of a sequence with

the same length of the data & add each element in this

array to its equivalent element in the signal .... try

this method ....

*************************************

Ahmad M. El-Saied

Faculty of Engineering

Cairo Univesity

Electronics & Electrical Communication Dep.

--- nishchal chaudhary <kantrinish@kant...> wrote:

--------------------------------- hii all,

I am trying to make a simulation program for

OFDM.My

modulation technique is BPSK.after doing the mapping

of original to

BPSK signal space, I am taking say N of those symbols

and performing

IFFT(I conjugate and append my BPSK data set so as to

obtain a real

signal out of the IFFT block).Now my problem goes like

this-

1) how do i model a frequency selective slow fading

which will

corrupt my signal coming out of IFFT.

2)Do I just need to consider the envelop of the fading

model for BPSK

3)if I use say,QPSK, do I need to consider the phase

component of the

fading model as well?

please suggest

thanks and regards

# if any one has matlab codes for the same, please

send them

nish! To

Send instant messages to your online friends http://uk.messenger.yahoo.com

Hi Nishchal,

i did the same project in the last mid year

vacation ... i remember that when i made the freuency

selective we made random generation of a sequence with

the same length of the data & add each element in this

array to its equivalent element in the signal .... try

this method ....

*************************************

Ahmad M. El-Saied

Faculty of Engineering

Cairo Univesity

Electronics & Electrical Communication Dep.

--- nishchal chaudhary <kantrinish@kant...> wrote:

--------------------------------- hii all,

I am trying to make a simulation program for

OFDM.My

modulation technique is BPSK.after doing the mapping

of original to

BPSK signal space, I am taking say N of those symbols

and performing

IFFT(I conjugate and append my BPSK data set so as to

obtain a real

signal out of the IFFT block).Now my problem goes like

this-

1) how do i model a frequency selective slow fading

which will

corrupt my signal coming out of IFFT.

2)Do I just need to consider the envelop of the fading

model for BPSK

3)if I use say,QPSK, do I need to consider the phase

component of the

fading model as well?

please suggest

thanks and regards

# if any one has matlab codes for the same, please

send them

nish! To

Send instant messages to your online friends http://uk.messenger.yahoo.com