[Discuss-gnuradio] Power Line Communications - GNURadio

2016-04-03 Thread Paul Creaser
I've just been placed in charge of project involving PLC (Narrowband Power line communication over DC in this case- See wiki https://en.m.wikipedia.org/wiki/PRIME_(PLC)), in particular PRIME. Unfortunately I know very little about the technology. Anyway I have download various documentation and I a

Re: [Discuss-gnuradio] Power Line Communications - GNURadio

2016-04-03 Thread Paul Creaser
Just to indicate I am progressing with studies. The below link seems to be a reasonable tutorial for beginners with regards to OFDM. http://complextoreal.com/wp-content/uploads/2013/01/ofdm2.pdf -- View this message in context: http://gnuradio.4.n7.nabble.com/Power-Line-Communications-GNURadio

Re: [Discuss-gnuradio] Power Line Communications - GNURadio

2016-04-03 Thread Paul Creaser
With regards to OFDM I have one question. I have a 8 channel OFDM using 8PSK. To me a single symbol using 8PSK means 8 bits, hence one byte of data. Since I have 8 channels, that would mean 64 bytes. This would equate to a single OFDM symbol of 64 bytes? Going on further a payload of 16 OFDM symb

[Discuss-gnuradio] Calculating additive noise power for known signal

2016-08-22 Thread Paul Creaser
I've just started studying methods used to detect and then filter out/remove cyclic noise from known signals. I have a signal of 256 samples which repeats itself. I take this signal, attenuate it and add noise at a specific band (frequency band), for example 50 Hz Sine Wave. In the simplest case

Re: [Discuss-gnuradio] Calculating additive noise power for known signal

2016-08-23 Thread Paul Creaser
In a real system the signal would be a preamble, which would normally be used for synchronization purposes at the receiver end (For example PLC system). "I'm not quite sure what you mean by "cyclic noise", but the example you give is 50 Hz (or 60 Hz) hum, so a narrowband interference." Cyclic noi

[Discuss-gnuradio] Usrp x310 LTE support, with/without external clock

2014-10-10 Thread Paul Creaser
I'm new to gnuradio and sdr. I'm looking to use a x310 usrp in an lte project. I have read it can support a 184.32MHz clock frequency which is great for LTE and a sample rate of 30.72MHz. I have looked at the uhd source code. I get the impression that the lte frequencies can only be supported

Re: [Discuss-gnuradio] Usrp x310 LTE support, with/without external clock

2014-11-12 Thread Paul Creaser
Thank you for the replies. I succeeded in using a clock rate of 184.32Mhz and a sample rate of 30.72MHz. -- View this message in context: http://gnuradio.4.n7.nabble.com/Usrp-x310-LTE-support-with-without-external-clock-tp50748p51280.html Sent from the GnuRadio mailing list archive at Nabble.co

[Discuss-gnuradio] Best Resample Method For Resampling LTE Data

2014-11-30 Thread Paul Creaser
Hi, I'm currently using the Rational Resampler in GUNURADIO to resample LTE data, for example from 30.72MHz to 15.36MHz and 50MHz to 15.36MHz. I`m able to decode the data, so every thing seems to be well. I chose the Rational Resampler, simply because it is easy to use. However I noticed, GNURADI

Re: [Discuss-gnuradio] Best Resample Method For Resampling LTE Data

2014-12-01 Thread Paul Creaser
I've used both the Fractional Resampler and the Rational Resampler so far with reasonable results. At this stage in the case of the Rational Resampler, I simply use the Interpolation setting and decimation setting to form a ratio (taps:None, Fractional BW:0), which then generates the required outpu