Is it an over-the-air transmission or TX and RX are connected with a wire and attenuators?
-George - George Sklivanitis PhD Student and Research Assistant Signals, Communications, and Networking Research Group Department of Electrical Engineering University at Buffalo, The State University of New York Office: 238 Davis Hall, Buffalo, NY 14260 Web: http://www.buffalo.edu/~gsklivan On Feb 11, 2014, at 11:57 AM, Martin Braun <[email protected]> wrote: > On 11.02.2014 06:19, Sylvain Munaut wrote: >> Hi, >> >>> I've done my homework on this one, crawled through the web & talked to >>> colleagues. If I am missing something obvious please point it out - it's not >>> for lack of effort on my part! >> >> I'm not really sure what you're expecting. Of course the phase >> alignement between the Tx and Rx is going to be random depending on >> restart. >> >> Using the same clock will prevent it from drifting, but the initial >> phase alignement is random. This is usually resolved by using training >> sequence, headers, differential encoding, ... > > I had the same thought -- it looks like a phase change. This is a PSK signal, > right? Have you looked at the constellation diagram? > > MB > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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