-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi George,
practical implementation aside: Thanks to Parseval's theorem, looking at relative signal strength in frequency and time domain is equivalent. You can just use a number sink or time sink with a low pass filter to visualize the received signal power of the carrier. If you're feeling like doing things completely right, you can automatically fine tune to the carrier by using PLL carrier tracking ;) As for implementation: there is the max block. What you could do is: PLL -> low pass -> complex to mag² -> integrate -> stream to vector -> max/argmax (depends on what you actually want to do) but that will not "update" your maximum during runtime but only find the maximum within a vector. However, implementing an "always output the (abs)maximum float value" block is really easy as a python block - in fact, doing that might be a great start into developing GNU Radio blocks. Doing it somewhat optimized might need some thought, though ;) Greetings, Marcus PS: please make sure not to respond to previous posts when bringing up a new topic; otherwise, your post will appear in that thread and is more likely to be ignored. On 20.03.2014 16:05, George S. Williams wrote: > I imagine this is doable, but between experimenting and Google I > have not been able to find a solution. The application is fairly > simple- a FCD is connected to a QT GUI Sink. The FCD is tuned to > the pilot frequency of a ATSC television channel. The attached > image shows the resulting spectrum. The application is intended to > assist in pointing an antenna to receive television broadcasts in a > rural area. > > What I would like to do is measure the peak and display a number > that represents its level. I have been able to average the entire > signal but can't figure out how to measure the peak. Any advice > would be appreciated. > > Thanks, George > > > > _______________________________________________ Discuss-gnuradio > mailing list Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTKxeHAAoJEBQ6EdjyzlHtYBgIALINVGpZDTQ962aMmNQfCiNm hePnKufnAgC6qL2PWgbnh6CaoIAgx2PF6O4RQlE+fO/qepves6KR5RG5zu5AnIqJ QEmBWlkxXn8GawBi27XDKc5X3hECUZzNVDrvXixePolYh/sCgQZdyYksWLEQ10fV nVCSvXVtXyEtNZqeabNGwk0xcaeiV85POuHm2j6QWOOGKjvUUCE3za33e0id7ras 9ykXyph1Nd/3r1Hoj+su9GiKKaWYwRLU/TJGdSpxhiUPk+XxHJEg1BkUyDX1MCFk KRaxadKjtJ5kFP/MhZXTqjY4trsS2aMviiwwNKVgD0iLUocOjJyDkTmuly6N8Ks= =ma6/ -----END PGP SIGNATURE----- _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
