>On Mar 25, 6:06=A0am, "m" <stuttbr...@hotmail.com> wrote:
>> Hi everybody,
>>
>> I have a doubt that can be very obvious for you but it has driven me
>> crazy. I want to know the performance of my demodulator by calculatin
th=
>e
>> BER curve respect to the EbN0. For that, I input some signals a
differen=
>t
>> EbN0 but how should I calculate the EbN0? My method for a comple
signal,
>> as I read several times, is:
>>
>> Eb =3D S/R; where S is the signal power and R is the data rate
>> N0 =3D N/Fs where N is the variance^2 and Fs is the samplin
frequency.
>>
>> However, I've also seen that N0 =3D N/B where B is the bandwidth o
the
>> channel. Comparing my BER curve with the theoretical one, it is quit
far
>> and I would like to be sure that my EbN0 calculation is 100% right an
th=
>en
>> check the demodulator.
>>
>> Could somebody please clear this point?
>> Thank you very much
>>
>> Regards
>> mary
>
>Surprisingly, the explanation on the MathWorks' website is quite
>good, and useful if you are simulating an AWGN channel in
>discrete-time.
>
>http://www.mathworks.com/support/sol...olution=3D1-1=
>9I4S
>
>Hope this helps,
>Julius
>

Thank you for your answer. Then it is using the sampling frequency.
Regards

Maria