Re: [Discuss-gnuradio] QPSK basic modulator

2009-04-08 Thread Karim El Defrawy
Thanks a lot Eric. That's very useful. Yes, you are right about the preamble. At this stage I am just doing the transmitter, later I will worry about how to correctly receive it and will probably add a preamble. Ed Criscuolo wrote: karim wrote: Hi, I need to implement a simple transmitter

Re: [Discuss-gnuradio] QPSK basic modulator

2009-04-08 Thread Karim El Defrawy
Jason Uher wrote: I checked the benchmark_tx.py it adds a preamble and a lot of data before the actual payload which I don't need. I assume you are trying to do some BER measurements? There is an example called digital-bert that will do that (bert=bit error rate tester). Actually I am not

Re: [Discuss-gnuradio] QPSK basic modulator

2009-04-08 Thread Ed Criscuolo
karim wrote: Hi, I need to implement a simple transmitter that uses QPSK as the demodulation mode. It should read data (characters) from a file and transmit them as they are without preamble or anything. What's the simplest and fastest way to do it. I checked the benchmark_tx.py it adds a pre

Re: [Discuss-gnuradio] QPSK basic modulator

2009-04-08 Thread Jason Uher
> I checked the benchmark_tx.py it adds a preamble and a lot of data before > the actual payload which I don't need. I assume you are trying to do some BER measurements? There is an example called digital-bert that will do that (bert=bit error rate tester). If you have some other goal in mind, I

[Discuss-gnuradio] QPSK basic modulator

2009-04-08 Thread karim
Hi, I need to implement a simple transmitter that uses QPSK as the demodulation mode. It should read data (characters) from a file and transmit them as they are without preamble or anything. What's the simplest and fastest way to do it. I checked the benchmark_tx.py it adds a preamble and a lo