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From: rseb on 20 Nov 2009 13:31
I am doing a simulation for channel coding algorithms for TETRA using
matlab. I did a simulation with AWGN noise and plotted graphs for BER and
MER vs Eb/No. But in the specification, the BER and MER are given for
different fading channels, say TU50(Typical Urban at speed 50km/h) and
HT200(Hilly Terrain at speed 200km/h) at receiver sensitivity level (-103
dBm). Is it possible to compare the AWGN results with that of spec? I know
I can simulate fading channels in matlab. But how can I simulate it at a
particular sensitivity level(say -103dBm)? Can anybody give suggestions to
accurately simulate the channels in matlab so that I can compare the
results with that of spec.

Best Regs.



From: John on 21 Nov 2009 21:51
On Nov 20, 1:31 pm, "rseb" <reny.sebast...(a)gmail.com> wrote:
> I am doing a simulation for channel coding algorithms for TETRA using
> matlab. I did a simulation with AWGN noise and plotted graphs for BER and
> MER vs Eb/No. But in the specification, the BER and MER are given for
> different fading channels, say TU50(Typical Urban at speed 50km/h) and
> HT200(Hilly Terrain at speed 200km/h) at receiver sensitivity level (-103
> dBm). Is it possible to compare the AWGN results with that of spec?  I know
> I can simulate fading channels in matlab. But how can I simulate it at a
> particular sensitivity level(say -103dBm)? Can anybody give suggestions to
> accurately simulate the channels in matlab so that I can compare the
> results with that of spec.
>

The signal will experience upfades as well downfades below
sensitivity. FEC and interleaving allow you to survive downfades to
some degree. It seems to me that a full simulation with channel and
demodulator are required to measure performance.

John
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