Re: [Discuss-gnuradio] Hard Disk Bottleneck

2007-02-11 Thread Martin Dvh
Vincenzo Pellegrini wrote: Hi everybody, just a quick question: has anybody managed so far to provide the usrp with the 8 Complex Msps needed to transmit an 8 MHz wide band? My problem is that such a bandwidth yields a 32MiBps throughput and, even if the USB2 bus and the CPU speed of my

Re: [Discuss-gnuradio] Hard Disk Bottleneck

2007-02-11 Thread Jim Perkins
The fastest thing you can do is make a dedicated partition and read and write it directly. This is very simple (open(), read(), write(), seek(), etc). I typically dedicate the first 1024 blocks to storing info about the files. I use one block per file and the first block stores info about

Re: [Discuss-gnuradio] GRC version 0.60

2007-02-11 Thread Anastasopoulos Achilleas
Josh, I imported some blocks from gr-trellis on GRC. However there seems to be a problem. The graph does not run and exits with something like: ... flow graph save SRC_DIR: /net/ernesto/home/anastas/grc_mine/src DATA_DIR: /net/ernesto/home/anastas/grc_mine/data FILE_PATH:

[Discuss-gnuradio] Extra padding in packet_utils.py (tunnel.py example)

2007-02-11 Thread Dan Halperin
In packet_utils.py, function make_packet, there is always at least one padding byte added: pkt = ''.join((packed_preamble, packed_access_code, make_header(L), whiten(payload_with_crc), '\x55')) Can anyone explain why this is necessary? We've found in our tests that not only is this

[Discuss-gnuradio] UDP source/sinks (revised)

2007-02-11 Thread Tom Rondeau
Alright, the new code for the UDP source/sinks was just checked in with all the fixes and additions required to actually make it, well, work. I tested it out in my lab using the new audio_source.py and audio_sink.py example scripts (in python/hier/networking) to stream my latest podcast of Fresh

Re: [Discuss-gnuradio] Cygwin Python Import Error

2007-02-11 Thread Don Ward
Brian Padalino [EMAIL PROTECTED] wrote: I had an old version of GNURadio installed on my cygwin setup, but decided to get the current development version in the svn repository. After checking it out, bootstrapping, configuring and starting a make - I had an error where the linker complained

[Discuss-gnuradio] help needed regarding correct hardware choice

2007-02-11 Thread Parth Pathak
Hi all, I have been constantly watching and understanding the GNUradio group activity from last 4 months now. As a student (and a newbie for GNUradio), I feel now I am in position to start some practical work on it. I am thinking of doing something with USRP and GNUradio especially

Re: [Discuss-gnuradio] help needed regarding correct hardware choice

2007-02-11 Thread Dan Halperin
Parth Pathak wrote: I am thinking of doing something with USRP and GNUradio especially in 802.11 domain or something in Bluetooth. If you people can please help me in buying the hardware first. Make sure to re-read carefully Tom Rondeau's email of 5 December 2006 about the feasibility of