Re: [Discuss-gnuradio] MAC layer development and USRP2

2010-03-14 Thread George Nychis
Think of it this way... MAC *development* is severely limited by GNU Radio... it lacks the much-needed functionality to make information passing between the blocks rich, simple, and bi-directional. Some of the building blocks are in place (e.g., PMT), and the m-block was implemented to solve the

[Discuss-gnuradio] MAC layer development and USRP2

2010-03-14 Thread Charles Irick
I've been reading some papers related to MAC layer development on the USRP, but they seem to have tapered off with the USRP2. Does anyone have any information about MAC layer and protocol development for the USRP2. Has this been satisfied with things like timestamps and gigE? Any current papers or

Re: [Discuss-gnuradio] LFRX boards at low-VHF frequencies

2010-03-14 Thread Martin DvH
On Fri, 2010-03-12 at 14:12 -0500, Marcus D. Leech wrote: > Has anybody on-list had experience using the BASIC_RX or LFRX boards at > low-vhf frequencies > (30-50MHz)?? BasicRX works when you add a corresponding bandfilter and a LNA. Note however that the first niquist frequency is at 32 Mhz wit

Re: [Discuss-gnuradio] bpsk lost some packet when transmit data discontinuously

2010-03-14 Thread Fisheep
Tom, It is really what you are said. After I transmitted packet several times, I got the probability of 1/2 that correctly received packet and probabilty of 1/2 that got nothing. I think this result is explicit when I change the carrier frequency from 900M Hz to 2.4G Hz. It is my fault. I though