Re: [Discuss-gnuradio] Tetra receiver

2009-01-22 Thread Grzegorz Suder
dqpsk.py module depends on mpsk_receiver_cc. In file $GNURADIO/gnuradio-core/src/lib/general/gr_mpsk_receiver_cc.h there is information: * This block takes care of receiving M-PSK modulated signals through phase, frequency, and symbol * synchronization. It performs carrier frequency and phase lo

Re: [Discuss-gnuradio] Tetra receiver

2009-01-21 Thread Tommi Rouvali
Hello, I have been thinking about this. I have access to two TETRA terminals. The down side is I am beginner in Gnu Radio and DSP in general. Is the π/4 DQPSK modulation really supported by Gnu radio? Any examples about this? Grzegorz Suder wrote: Hello, I've looked through Wiki and discus

Re: [Discuss-gnuradio] Tetra receiver

2009-01-21 Thread Brian Padalino
On Wed, Jan 21, 2009 at 3:17 PM, Grzegorz Suder wrote: > Actualy what I am worrying about are discontinuous TDMA signals (for > example: receiving specific time slot). I guess that capturing such TDMA > signal (Tetra is just an example due to 4 time slots) where only one slot is > transmitting may

Re: [Discuss-gnuradio] Tetra receiver

2009-01-21 Thread Grzegorz Suder
Actualy what I am worrying about are discontinuous TDMA signals (for example: receiving specific time slot). I guess that capturing such TDMA signal (Tetra is just an example due to 4 time slots) where only one slot is transmitting may require synchronization to external time source. On Wed, Jan 2

Re: [Discuss-gnuradio] Tetra receiver

2009-01-21 Thread Eric Blossom
On Mon, Jan 19, 2009 at 10:56:13AM +0100, Grzegorz Suder wrote: > Hello, > I've looked through Wiki and discussion archives but I haven't found answer > for my question. Is there any working code for Gnu Radio that is able to > receive Tetra subscriber (not base station) signal and convert it into

[Discuss-gnuradio] Tetra receiver

2009-01-19 Thread Grzegorz Suder
Hello, I've looked through Wiki and discussion archives but I haven't found answer for my question. Is there any working code for Gnu Radio that is able to receive Tetra subscriber (not base station) signal and convert it into bitstream? I believe that demodulation is already done (DQPSK as I know)