On Wed, May 6, 2020 at 7:48 PM Artur Nogueira <artur.no...@gmail.com> wrote:
> Hello guys, > > I'm trying to generate a GMSK signal in accordance to the GSM > specifications. To do so, I've been trying with both "GMSK Mod" and "GMSK > Modulator" blocks, the last one with the following parameters: > > [image: image.png] > > To set these parameters, I considered (i) a sufficiently high base-band > sampling rate (samples/symbol) in order to avoid aliasing; (ii) the > well-known 0.3 BT product and (iii) a 156 bits GSM pulse, i.e. 1 time slot > (I considered that GMSK provides 1 bit/symbol). > > Nevertheless, my signals have a bandwidth which is much larger than the > 200 kHz requirement. > What am I doing wrong? > I think you want something more like 3 symbols for your pulse duration. Not 156. Brian >