hello felix,
>>please remember to always reply to
the list.
i'm sorry, i'm new at this. i have checked
my configuration and i hope it works the next
time.
to mix up the baseband signal to 12khz or
higher to short wave (3-30mhz) should be the
same procedure. i have tested it by using a
multiply block and a signal source block as
the carrier frequency.
but there is an other question: if i
configured my system as described, can i be
sure that the bandwidth of each sub carrier
has the bandwidth and symbol duration as shown
by the equations?
used_bw = occupied_carriers * df
df = used_bw / occupied_carriers = 10khz /
228
df = 43.86hz --> tsym = 22.8ms
it's very confusing why i have to adjust my
used bw by changing the sampling rate. when i
follow the equations and the standard i choose
one mode (RM A, SO 3). that means i have to
use 228 carriers
and have a symbol duration with 24ms which
leads to 41.66hz carrier spacing. so the used
bw is 228 * 41.66hz = 9.5khz (approx. 10khz).
this bw should be fix and should not change by
the sampling rate.
sorry for the maybe silly questions but i
want to keep on that stuff.