Re: [Discuss-gnuradio] Time delaying a signal
On 12.05.2014 20:19, Marcus Müller wrote: Well, not that I'm aware of. However, FFT, multiplication with a signal source, IFFT is not really hard to do, and it's what a time shift mathematically is. Careful... if you do that on a stream, you have to keep track of phases. I know Marcus knows this -- consider this a don't do this at home unless you know what you're doing :) Martin ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Time delaying a signal
On 13.05.2014 07:14, asad umer wrote: I am also using the delay block in the way u have mentioned but the signal in scope doesn't act accordingly ,it remains in phase with the original... That's unlikely. Do this: 1) Connect sig source into port 1 of your scope (e.g. create a sine wave) 2) Connect same sig source to delay 3) Connect delay to port 2 of your scope 4) Choose a good delay that's not multiples of your wave length 5) Et voilá, phase shift. M ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Time delaying a signal
I want to introduce a time delay in a signal received through USRP...I have used the 'Delay' block but it is not showing any delay...what is the appropriate block to use?? Can i delay the phase instead? Are time and phase delay equal? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Time delaying a signal
On 05/12/2014 02:02 PM, asad umer wrote: I want to introduce a time delay in a signal received through USRP...I have used the 'Delay' block but it is not showing any delay...what is the appropriate block to use?? Can i delay the phase instead? Are time and phase delay equal? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio The delay block is in samples. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Time delaying a signal
On 5/12/14, Marcus D. Leech mle...@ripnet.com wrote: On 05/12/2014 02:02 PM, asad umer wrote: I want to introduce a time delay in a signal received through USRP...I have used the 'Delay' block but it is not showing any delay...what is the appropriate block to use?? Can i delay the phase instead? Are time and phase delay equal? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio The delay block is in samples. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio so there is no exclusive block for this purpose in GRC?? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Time delaying a signal
The delay block works in samples so to get seconds you have to multiply the sample rate by the number of seconds you want to be delayed by. Mike On Mon, May 12, 2014 at 7:14 PM, asad umer user0...@gmail.com wrote: On 5/12/14, Marcus D. Leech mle...@ripnet.com wrote: On 05/12/2014 02:02 PM, asad umer wrote: I want to introduce a time delay in a signal received through USRP...I have used the 'Delay' block but it is not showing any delay...what is the appropriate block to use?? Can i delay the phase instead? Are time and phase delay equal? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio The delay block is in samples. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio so there is no exclusive block for this purpose in GRC?? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Time delaying a signal
On 05/12/2014 02:14 PM, asad umer wrote: so there is no exclusive block for this purpose in GRC?? A delay in samples is a delay in time: 1 sample == 1/sample-rate seconds of delay -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Time delaying a signal
Well, not that I'm aware of. However, FFT, multiplication with a signal source, IFFT is not really hard to do, and it's what a time shift mathematically is. Greetings, Marcus On Mon, May 12, 2014 at 8:14 PM, asad umer user0...@gmail.com wrote: On 5/12/14, Marcus D. Leech mle...@ripnet.com wrote: On 05/12/2014 02:02 PM, asad umer wrote: I want to introduce a time delay in a signal received through USRP...I have used the 'Delay' block but it is not showing any delay...what is the appropriate block to use?? Can i delay the phase instead? Are time and phase delay equal? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio The delay block is in samples. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio so there is no exclusive block for this purpose in GRC?? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Time delaying a signal
On 05/12/2014 02:19 PM, Marcus Müller wrote: Well, not that I'm aware of. However, FFT, multiplication with a signal source, IFFT is not really hard to do, and it's what a time shift mathematically is. Greetings, Marcus Also, a phase-shift is just a complex multiply by: complex(cos(ang),sin(ang)) With angle in radians That's how I do manual phase correction in the interferometer support in simple_ra -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Time delaying a signal
To shift just the phase you can use the 'Complex To Float' block in GRC which separates the stream into real and imaginary components. After adding the delay block in line with the imaginary component you can then recombine the stream by using the 'Float To Complex' block. Mike -- Mike Jameson M0MIK BSc MIET Email: m...@scanoo.com Web: http://scanoo.com On Mon, May 12, 2014 at 7:23 PM, Marcus D. Leech mle...@ripnet.com wrote: On 05/12/2014 02:19 PM, Marcus Müller wrote: Well, not that I'm aware of. However, FFT, multiplication with a signal source, IFFT is not really hard to do, and it's what a time shift mathematically is. Greetings, Marcus Also, a phase-shift is just a complex multiply by: complex(cos(ang),sin(ang)) With angle in radians That's how I do manual phase correction in the interferometer support in simple_ra -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Time delaying a signal
I am also using the delay block in the way u have mentioned but the signal in scope doesn't act accordingly ,it remains in phase with the original... On Mon, May 12, 2014 at 11:27 PM, Mike Jameson m...@scanoo.com wrote: To shift just the phase you can use the 'Complex To Float' block in GRC which separates the stream into real and imaginary components. After adding the delay block in line with the imaginary component you can then recombine the stream by using the 'Float To Complex' block. Mike -- Mike Jameson M0MIK BSc MIET Email: m...@scanoo.com Web: http://scanoo.com On Mon, May 12, 2014 at 7:23 PM, Marcus D. Leech mle...@ripnet.comwrote: On 05/12/2014 02:19 PM, Marcus Müller wrote: Well, not that I'm aware of. However, FFT, multiplication with a signal source, IFFT is not really hard to do, and it's what a time shift mathematically is. Greetings, Marcus Also, a phase-shift is just a complex multiply by: complex(cos(ang),sin(ang)) With angle in radians That's how I do manual phase correction in the interferometer support in simple_ra -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
