[Discuss-gnuradio] Can we control the number of channels and its constellation?

2008-04-08 Thread CHIN-YA HUANG
Hey, I am working for the ofdm code. I saw ofdm.py. It implements the OFDM modulation and demodulation, but it seems not mention the number of channels. How many channels are we used for the odfm ? Is it a fixed value? Can I control the number of channels and put different constellation scheme fo

Re: [Discuss-gnuradio] Can we control the number of channels and its constellation?

2008-04-08 Thread Tom Rondeau
CHIN-YA HUANG wrote: Hey, I am working for the ofdm code. I saw ofdm.py. It implements the OFDM modulation and demodulation, but it seems not mention the number of channels. How many channels are we used for the odfm ? Is it a fixed value? Look at gnuradio-examples/src/python/ofdm/benchmar

Re: [Discuss-gnuradio] USRP w/ 4-bit I&Q samples

2008-04-08 Thread Paul Creekmore
Tyrel, The current FPGA configuration does not support 4-bit samples, but it is possible to modify the configuration (Verilog code) to convert the samples to 4-bit. My research group is currently working on adding 1, 2, and 4-bit quantization options to the USRP, as well as accompanying data

Re: [Discuss-gnuradio] USRP w/ 4-bit I&Q samples

2008-04-08 Thread Firas Abbas
Hi, If the I,Q bit width output of the DDC is reduced from 16 bit to 12 bit, then I & Q will occupy 24 bit (3 Bytes). Thus we will be able to maximize the instantaneous bandwidth to 32MB/3 = 10.6MHz without scarifying much because the original signal was digitized with 12 bit ADC. Regards, Fi

Re: [Discuss-gnuradio] USRP w/ 4-bit I&Q sample

2008-04-08 Thread Gregory Maxwell
On Tue, Apr 8, 2008 at 1:01 PM, Firas Abbas <[EMAIL PROTECTED]> wrote: > Hi, > > If the I,Q bit width output of the DDC is reduced from 16 bit to 12 bit, > then I & Q will occupy 24 bit (3 Bytes). Thus we will be able to maximize > the instantaneous bandwidth to 32MB/3 = 10.6MHz without scarifying

[Discuss-gnuradio] c++ example about reading data from usrp

2008-04-08 Thread Sl Peng
Hi all: I wonder if there is any C++ example show how to read data from the USRP. Currently the only example i can find is the usrp_rx_cfile.py, but it was written by python which i am not quit understand. Is there any c++ example about how to read data from USRP? -- Posted via http://www.ruby-f

Re: [Discuss-gnuradio] c++ example about reading data from usrp

2008-04-08 Thread George Nychis
Sl Peng wrote: Hi all: I wonder if there is any C++ example show how to read data from the USRP. Currently the only example i can find is the usrp_rx_cfile.py, but it was written by python which i am not quit understand. Is there any c++ example about how to read data from USRP? Hi, Take a

Re: [Discuss-gnuradio] c++ example about reading data from usrp

2008-04-08 Thread Eric Blossom
On Tue, Apr 08, 2008 at 05:12:42PM -0400, George Nychis wrote: > > > Sl Peng wrote: >> Hi all: >> >> I wonder if there is any C++ example show how to read data from the >> USRP. >> >> Currently the only example i can find is the usrp_rx_cfile.py, but it >> was written by python which i am not quit

Re: [Discuss-gnuradio] c++ example about reading data from usrp

2008-04-08 Thread George Nychis
Eric Blossom wrote: On Tue, Apr 08, 2008 at 05:12:42PM -0400, George Nychis wrote: Sl Peng wrote: Hi all: I wonder if there is any C++ example show how to read data from the USRP. Currently the only example i can find is the usrp_rx_cfile.py, but it was written by python which i am not qui

[Discuss-gnuradio] Matlab interface to USRP

2008-04-08 Thread Pu, Di
Hello all, I am trying to figure out the Matlab interface to USRP. Although I could enable the communications between Matlab and GNU Radio, I am wondering whether it is possible to make Matlab hook to USRP directly without GNU radio. Thank you very much! __