[Discuss-gnuradio] Re: accessing packet payload in reception

2007-04-16 Thread Ben Olsen
lost this deep into it... Again, thanks for any assistance -Ben Olsen On 4/16/07, Ben Olsen <[EMAIL PROTECTED]> wrote: Hello! I'm trying to implement a scheme in which I have a receiving node accept a frequency to tune to from a sending node, and I would appreciate any advice how to

[Discuss-gnuradio] accessing packet payload in reception

2007-04-16 Thread Ben Olsen
the lines of: (message = *access to the depths of the demodulation blocks and packet queues, giving me the string "desname.sourcename.str(frequency)" *) parsed = message.split('.', 3) # to tokenize the message between the '.' # n

Re: [Discuss-gnuradio] gr_add_cc use

2007-01-06 Thread Ben Olsen
onnect(self.packet_transmitter1, self.chan_filt1, (self.adder, 0)) fg.connect(self.packet_transmitter2, self.chan_filt2, (self.adder, 1)) Hope this helps. -Josh Ben Olsen wrote: > Hello, > > I am having a problem in trying to add multiple complex filter outputs > using the gr_add_cc code, I think the soluti

[Discuss-gnuradio] gr_add_cc use

2007-01-06 Thread Ben Olsen
Hello, I am having a problem in trying to add multiple complex filter outputs using the gr_add_cc code, I think the solution might be pretty simple but I'm not very experienced with GNURadio! (I'm working on it...) Here is a code snippet: ~~ self.packet_transmitter1 = blks.gmsk2_mod_pkts

[Discuss-gnuradio] freq_xlating filter

2006-11-21 Thread Ben Olsen
Hello, I'm trying to use the freq_xlating filter to select a narrowband portion of a wideband signal, but I'm a bit confused as to exactly how much I'm changing the center frequency of the filter from the baseband value. Could someone break it down for me please: here is where i create the filte

[Discuss-gnuradio] GMSK channel filter

2006-10-09 Thread Ben Olsen
Hello, I have a bit of a confusion concerning the decimating Channel filter in the stock receive_path.py script that I'm using with the GMSK rx and tx python script: The filter coefficients for the chan_filt filter are determined by the gr.firdes.low_pass() function, which takes, among other arg

[Discuss-gnuradio] signal processing block output

2006-09-13 Thread Ben Olsen
Hi, Following up on my last question (thanks for replying Jonathan and Eric!), I would now like to have the data from gr_nlog10_ff() to manipulate, such as printing on the screen or eventually inputting into a simple threshold decision block.  For the time being, I'd like to print to the screen. 

[Discuss-gnuradio] signal strength block

2006-09-11 Thread Ben Olsen
Hi, I'm trying to determine the strength of a complex filtered signal from a USRP board; that is, I take the data from the USRP board and I lowpass filter it, and now I'd like to either fft then integrate the complex output to get the signal energy, or just straight away do a  sum on the sequence

[Discuss-gnuradio] received signal strength circuit

2006-09-08 Thread Ben Olsen
Hi, I'm analyzing transmission between two Ettus USRP boards using the benchmark_gmsk_tx and _rx.py scripts and I have a question regarding the rssi (received signal strength indicator) circuits, because i've noticed some strange behavior.  Let's say I transmit at a center frequency of 2440 Mhz, w