Thank you very much, for your help Mr. Economos, For sure I will take a look at this project,
Yuri. 2014-05-14 21:12 GMT-03:00 Ron Economos <w...@comcast.net>: > If you haven't already, you may want to take a look > at this GnuRadio DVB-T implementation. > > https://github.com/BogdanDIA/gr-dvbt > > Ron > > > On 5/14/2014 1:50 PM, Yuri P.M wrote: > > Hi, > > Thanks Mr. Economos and Mr. Braun, > > I left this parameter in blank (I guess this is the same as an empty > string), it seems that it is working now. > > Actually I am trying to modulate ISDB-T data stream. I am working with > vectors, instead of data stream. > > Thanks again. > > > 2014-05-14 5:28 GMT-03:00 Martin Braun <martin.br...@ettus.com>: > >> On 14.05.2014 04:36, Ron Economos wrote: >> >>> If you're sending packets, then Length Tag Key should be >>> set to the packet length you're using. If you're sending >>> a stream (like DVB-T), then this field is not used (and >>> left blank). >>> >> >> It needs an empty string, in this case. >> >> >> The OFDM cyclic prefixer is used after the (reverse) >>> FFT block. The FFT Length in the OFDM Cyclic Prefixer >>> block should match the FFT Size in the FFT block. >>> >> >> That's right. The block doesn't check if the input is actually OFDM. >> >> Martin >> >>> >>> Ron >>> >>> On 5/13/2014 6:06 PM, Yuri P.M wrote: >>> >>>> Hello, >>>> >>>> My name is Yuri. >>>> I very new to GNU Radio, and I'm using GRC 3.7.1. >>>> >>>> >>>> I am doing a research, and I need to modulate specific signal in OFDM. >>>> I would like to insert cyclic prefix (or guard interval in my project, >>>> the same thing with a different name). >>>> >>>> I looked at the examples >>>> under gr-digital >>>> /examples/ofdm, and I've also read some papers about OFDM technics. >>>> >>>> My doubt is: what is the parameter "Length Tag Key"? I've seen it >>>> working in the examples located in the folder above, I've tried to do >>>> the same in my project, but it states a message that this parameter is >>>> missing. >>>> >>>> By chance, does this cyclic prefixer block only works with other >>>> blocks of the same category? I mean, do I need to use OFDM carrier >>>> allocator before it, or something like that? >>>> >>>> Thank you for your attention, >>>> >>>> Yuri. >>>> >>> >>> > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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