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From: | Markus Feldmann |
Subject: | [Discuss-gnuradio] Re: uses gr.file_sink 32 bit or 64 bit |
Date: | Thu, 26 Mar 2009 23:21:35 +0100 |
User-agent: | Mozilla-Thunderbird 2.0.0.19 (X11/20090103) |
Eric Blossom schrieb:
On Thu, Mar 26, 2009 at 07:32:09AM -0700, Johnathan Corgan wrote:On Thu, Mar 26, 2009 at 4:12 AM, feldmaus <address@hidden> wrote:i want to save some output from the usrp and watch it with octave.The usrp.source_c(...) block generates IQ data as pairs of 32-bit floating point values.Or to avoid any confustion about how many samples are getting generated, I think it's easier to think that it generates samples that are of type std::complex<float>. Eric
Yes its confusing me. :-( Ok, here is a clipping from the data at the beginning: 0 + 0i 0 + 0i -1 + 0i 0 - 1i -13 + 2i 65 - 32i -183 + 98i 412 - 233i -831 + 478i 1572 - 918i -3050 + 1745i 8314 - 4139i -12548 - 5491i 3899 + 10329i 3523 - 2748i -1791 + 1379i 951 - 738i -484 + 378i 219 - 176i -84 + 69i 19 - 20i 0 + 0i 0 - 1i 0 + 0i 0 - 1i 0 + 0i 0 - 1i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 + 0i 0 - 1i 0 + 0i -1 - 1i 0 + 0i -1 - 1i 0 + 0i -1 - 1i 0 + 0i -1 + 0i 0 - 1i 0 + 0i -1 - 1i 0 + 0i -1 + 0i 0 - 1i -1 + 0i How can i collect bits from the I or Q Signal ? So the first 16 bits from the left side are the I Signal ? And the first 16 bits from the right side are the Q Signal ? Where is the beginning of the samples ? Maybe the curious values at the beginning is the start point ? Regards Markus
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