Re: [Discuss-gnuradio] Benchmark-rx/tx.py with QPSK modulation

2009-05-12 Thread Bill Stevenson
Hi Boris I think you need to specify costas-alpha as 0.05 and gain-mu as 0.001 as your starting point. Hope this would help. Bill --- On Tue, 5/12/09, Eric Blossom e...@comsec.com wrote: From: Eric Blossom e...@comsec.com Subject: Re: [Discuss-gnuradio] Benchmark-rx/tx.py with QPSK modulation

[Discuss-gnuradio] a running problem with the USRP, i am confused!

2009-05-08 Thread Bill Stevenson
Hello, I tried the DBPSK and DQPSK scheme with benchmark_tx.py and benchmark_rx.py. I found there is a problem with USRP. After having TX and RX rest for 20 mins, the communication between them are so good that the PDR detected at the RX is almost 99%, but after those two USRPs run for a while,

Re: [Discuss-gnuradio] a running problem with the USRP, i am confused!

2009-05-08 Thread Bill Stevenson
...@gmail.com Subject: Re: [Discuss-gnuradio] a running problem with the USRP, i am confused! To: Bill Stevenson bill.stevenso...@yahoo.com, discuss-gnuradio@gnu.org Date: Friday, May 8, 2009, 4:35 PM Does it mean USRP could not keep on running for a long time or the USRP boards we are using have been

Re: [Discuss-gnuradio] a question about Reed-Solomon in GNURadio!

2009-05-08 Thread Bill Stevenson
Stevenson bill.stevenso...@yahoo.com wrote: From: Bill Stevenson bill.stevenso...@yahoo.com Subject: [Discuss-gnuradio] a question about Reed-Solomon in GNURadio! To: discuss-gnuradio@gnu.org Date: Friday, May 1, 2009, 2:41 AM I implemented the reed-solomon coding scheme in gr-atsc onto

Re: [Discuss-gnuradio] some results about D8PSK (problems)

2009-05-07 Thread Bill Stevenson
receiver block, which leads to bad performance for larger offsets. Can you try the attached patch? (Lacking time to test it myself atm ...) Stefan On Wednesday 18 March 2009 22:19:50 Bill Stevenson wrote: From: Bill Stevenson bill.stevenso...@yahoo.com To: Bill

[Discuss-gnuradio] a question about Reed-Solomon in GNURadio!

2009-04-30 Thread Bill Stevenson
I implemented the reed-solomon coding scheme in gr-atsc onto benchmark_tx.py and benchmark_rx.py. Following describes the results I got: 1, The transmitter can transmit reed-solomon coded stream with no problem. The receiver just keeps on waiting for the packets. There is no response at the

Re: [Discuss-gnuradio] a question about the antenna VERT2450

2009-04-22 Thread Bill Stevenson
Hello, Erric Could you tell me the effective noise temperature for VERT2450? I have searched the mailing list, but there is no answer for it. Thank you! Bill From: Bill Stevenson bill.stevenso...@yahoo.com To: discuss-gnuradio@gnu.org Sent: Tuesday, April 21

Re: [Discuss-gnuradio] a question about the antenna VERT2450

2009-04-22 Thread Bill Stevenson
Hi, Matt I have read that Wiki article and got it! The noise temperature of that antenna could be ignored. Thank you! Bill From: Matt Ettus m...@ettus.com To: Bill Stevenson bill.stevenso...@yahoo.com Cc: discuss-gnuradio@gnu.org Sent: Wednesday, April 22

[Discuss-gnuradio] a question about the antenna VERT2450

2009-04-21 Thread Bill Stevenson
Hello, I have a simple question about the antenna effective noise temperature for VERT2450. Does anybody know its effective noise temperature? Thanks a lot! I hope Ettus could let me know. Thanks! Bill ___ Discuss-gnuradio mailing list

Re: [Discuss-gnuradio] QPSK phase noise

2009-04-13 Thread Bill Stevenson
signal, and I'm trying to install scipy to enable the plot_const.py, etc. I also wanna load the data using Matlab, I wonder how can you output the data to a sink file? Thanks! On Fri, Apr 10, 2009 at 4:46 PM, Bill Stevenson bill.stevenso...@yahoo.com wrote: Hi, We can output the data to a sink

Re: [Discuss-gnuradio] QPSK phase noise

2009-04-10 Thread Bill Stevenson
Hi, Paco Actually, I got the similar result as you did. I think there was something wrong in the mpsk_receiver block. I am checking it. Thanks! Bill From: Paco Garcia sarev...@gmail.com To: Discuss-gnuradio@gnu.org Sent: Wednesday, April 8, 2009 9:26:36 AM

Re: [Discuss-gnuradio] a question about QAM implementation in GNURadio

2009-04-10 Thread Bill Stevenson
Hi, Yufeng I am sorry for late reply. Unfortunately, I have not found it yet. Thanks! Best, Bill From: yufeng wang kthyuf...@gmail.com To: Bill Stevenson bill.stevenso...@yahoo.com Sent: Wednesday, March 25, 2009 11:58:26 AM Subject: Re: [Discuss-gnuradio

Re: [Discuss-gnuradio] QPSK phase noise

2009-04-10 Thread Bill Stevenson
Hi, We can output the data to a sink file, from which we load the data using Matlab. Then we use scatterplot. Thanks! Bill From: yufeng wang kthyuf...@gmail.com To: Bill Stevenson bill.stevenso...@yahoo.com Sent: Friday, April 10, 2009 12:22:15 PM Subject

[Discuss-gnuradio] some understanding about using FEC in GNURadio

2009-04-10 Thread Bill Stevenson
Hi! I searched the mailing-list for the Reed-Solomon coding in GNURadio and reached some conclusions 1, if we wanna call RS in Python, we need to create our own C++ signal processing block using the traditional C code in Reed-Solomon folder. After that, we can call RS in Python. 2, we can

Re: [Discuss-gnuradio] some results about D8PSK (problems)

2009-03-19 Thread Bill Stevenson
the attached patch? (Lacking time to test it myself atm ...) Stefan On Wednesday 18 March 2009 22:19:50 Bill Stevenson wrote: From: Bill Stevenson bill.stevenso...@yahoo.com To: Bill Stevenson bill.stevenso...@yahoo.com Sent: Wednesday, March 18, 2009 5:16:26 PM

Re: [Discuss-gnuradio] some results about D8PSK (problems)

2009-03-18 Thread Bill Stevenson
From: Bill Stevenson bill.stevenso...@yahoo.com To: Bill Stevenson bill.stevenso...@yahoo.com Sent: Wednesday, March 18, 2009 5:16:26 PM Subject: Re: [Discuss-gnuradio] some results about D8PSK (problems) Hello, I have searched the mailing list

Re: [Discuss-gnuradio] DBPSK and Carrier Suppressed or Not?

2009-03-18 Thread Bill Stevenson
From: Eric Blossom e...@comsec.com To: w w biscuitk...@gmail.com Cc: discuss-gnuradio@gnu.org Sent: Wednesday, March 18, 2009 4:30:04 PM Subject: Re: [Discuss-gnuradio] DBPSK and Carrier Suppressed or Not?   If I take the output of the modulator and go

[Discuss-gnuradio] some experimentation results about D8PSK (problems)

2009-03-17 Thread Bill Stevenson
Hi I just did PDR testing between two USRPs with D8PSK modulation scheme. The files I used are benchmark_rx.py and benchmark_tx.py. Two exceptional results confused me a lot: 1, the --tx-amplitude has to be adjusted to the default value (12000), with which the PDR could reach 100%, otherwise,

Re: [Discuss-gnuradio] does the number of samples per symbol for the dbpsk case really affect the PDR performance?

2009-03-06 Thread Bill Stevenson
From: Tom Rondeau trondeau1...@gmail.com To: Bill Stevenson bill.stevenso...@yahoo.com Cc: discuss-gnuradio@gnu.org Sent: Thursday, March 5, 2009 11:30:33 PM Subject: Re: [Discuss-gnuradio] does the number of samples per symbol for the dbpsk case really

Re: [Discuss-gnuradio] does the number of samples per symbol for the dbpsk case really affect the PDR performance?

2009-03-06 Thread Bill Stevenson
From: Tom Rondeau trondeau1...@gmail.com To: Bill Stevenson bill.stevenso...@yahoo.com Cc: discuss-gnuradio@gnu.org Sent: Friday, March 6, 2009 10:55:09 AM Subject: Re: [Discuss-gnuradio] does the number of samples per symbol for the dbpsk case really affect

[Discuss-gnuradio] does the number of samples per symbol for the dbpsk case really affect the PDR performance?

2009-03-05 Thread Bill Stevenson
Hi, We did the outdoor testing today to find out the relationship between RSSI and Distance and the relationship between RSSI and PDR with USRP and GNURadio. Mistakenly, the number of samples per symbol at the TX side was set to 4 and the number of samples per symbol at the RX side was set to

[Discuss-gnuradio] a question about QAM implementation in GNURadio

2009-02-16 Thread Bill Stevenson
Hello, everyone! We are doing some experiments on multirate transmission via USRP. As we all know, using different modulation schemes is the crucial part for this research. In our GUNRadio, QAM modulator is already there, but I don't understand why its demolator part is empty. Is there any

[Discuss-gnuradio] a real world testing using USRP in a free space environment, need help on some questions

2009-02-13 Thread Bill Stevenson
Hello, all! Our team is trying to find out the relationship between PER and Received Signal Strength as well as the relationship between Distance and Received Signal Strength under DBPSK modulation scheme using two USRP borads. Our test was set up in a near free space environment, but the

Re: [Discuss-gnuradio] some hardware parameters of the USRP board

2009-02-04 Thread Bill Stevenson
From: Bill Stevenson bill.stevenso...@yahoo.com To: discuss-gnuradio@gnu.org Sent: Tuesday, February 3, 2009 3:52:26 PM Subject: [Discuss-gnuradio] some hardware parameters of the USRP board Hello, all! I have a question about some hardware parameters

[Discuss-gnuradio] some hardware parameters of the USRP board

2009-02-03 Thread Bill Stevenson
Hello, all! I have a question about some hardware parameters of the USRP board. What is the antenna temperature and what is the amplifier gain after the antenna when the board we are using is RFX2400 and the antenna is the VERT2450 ? Thanks a lot! Bill

[Discuss-gnuradio] calculation of the real transmitted signal power if --tx-amplitidue is set dynamically

2009-01-30 Thread Bill Stevenson
Hello, all! We are using RFX2400 to transmit some signals. As known, transmit power of that board is said to be 50mW shown on the datasheet and the default value of --tx-amplitude in benchmark_tx.py file is 12000. Can we say the real transmitted signal power is 50mW which is correspoding to

Re: [Discuss-gnuradio] calculation of the real transmitted signal power if --tx-amplitidue is set dynamically

2009-01-30 Thread Bill Stevenson
- Forwarded Message From: Bill Stevenson bill.stevenso...@yahoo.com To: Matt Ettus m...@ettus.com Sent: Friday, January 30, 2009 5:39:18 PM Subject: Re: [Discuss-gnuradio] calculation of the real transmitted signal power if --tx-amplitidue is set dynamically

Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

2008-12-06 Thread Bill Stevenson
From: Bill Stevenson [EMAIL PROTECTED] To: Johnathan Corgan [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Thursday, December 4, 2008 9:57:02 PM Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

2008-12-04 Thread Bill Stevenson
From: Johnathan Corgan [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Wednesday, December 3, 2008 2:57:55 PM Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio Thank you, Johnathan! I did my

Re: [Discuss-gnuradio] testing outside building with our USRPs

2008-12-04 Thread Bill Stevenson
From: David Burgess [EMAIL PROTECTED] To: Daniel O'Connor [EMAIL PROTECTED] Cc: Bill Stevenson [EMAIL PROTECTED] Sent: Tuesday, December 2, 2008 1:27:07 AM Subject: Re: [Discuss-gnuradio] testing outside building with our USRPs Thank you, David and Daniel! I

Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

2008-12-04 Thread Bill Stevenson
From: Johnathan Corgan [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Thursday, December 4, 2008 6:25:24 PM Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio On Thu, Dec 4, 2008 at 1:04 PM

Fw: [Discuss-gnuradio] testing outside building with our USRPs

2008-12-01 Thread Bill Stevenson
- Forwarded Message From: Bill Stevenson [EMAIL PROTECTED] To: Blair Strang [EMAIL PROTECTED] Sent: Monday, December 1, 2008 12:13:50 PM Subject: Re: [Discuss-gnuradio] testing outside building with our USRPs From: Blair Strang [EMAIL PROTECTED

[Discuss-gnuradio] adaptive transmit power of RFX2400 daughter board

2008-12-01 Thread Bill Stevenson
Hello, all! I am looking into the benchmark_tx.py file under the directory of python/digital. The default value of the --tx-amplitude is 12000 and the transmit power of RFX2400 is 50mW. Is there any relationship between these two numbers? If I changed the --tx-amplitude to be 1200, what is

[Discuss-gnuradio] the antenna for transmission in 2.48-2.9GHz

2008-12-01 Thread Bill Stevenson
Hello, all! We are trying to bypass the ISM band to transmit data, say outside 2.48GHz. But I cannot find a suitable antenna for this kind of transmission on ettus.com, the antenna we are using isVERT2450 which is not ideal outside 2.48GHz. What kind of antenna should we use? Thanks a lot!

Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

2008-12-01 Thread Bill Stevenson
From: Johnathan Corgan [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Sent: Thursday, November 27, 2008 3:02:23 AM Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio No problem, Johnathan. After reading this, I did my

Re: [Discuss-gnuradio] testing outside building with our USRPs

2008-12-01 Thread Bill Stevenson
David - Thank you, I understand it! But how did you get your computer powered when you were doing experiment outside? The laptops in our lab are very limited. Thank you! Bill From: David Burgess [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc

Re: [Discuss-gnuradio] testing outside building with our USRPs

2008-12-01 Thread Bill Stevenson
From: David Burgess [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Sent: Monday, December 1, 2008 6:59:00 PM Subject: Re: [Discuss-gnuradio] testing outside building with our USRPs Bill - I got a laptop power rig designed for automotive and air travel

[Discuss-gnuradio] testing outside building with our USRPs

2008-11-30 Thread Bill Stevenson
Hello, all! We are utilizing USRPs to test the transmission range under some certain circumstances, say different modulation schemes. We are planning on testing the range outside, say in a football field since that condition is similar to the free space environment. But how can we get power

Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

2008-11-26 Thread Bill Stevenson
From: Johnathan Corgan [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Wednesday, November 26, 2008 9:28:05 AM Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio On Tue, Nov 25, 2008 at 8:46 PM

Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

2008-11-26 Thread Bill Stevenson
From: Johnathan Corgan [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Wednesday, November 26, 2008 9:28:05 AM Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio On Tue, Nov 25, 2008 at 8:46 PM

Re: [Discuss-gnuradio] inconsistency in the PER versus distance using USRP

2008-11-25 Thread Bill Stevenson
From: Dan Halperin [EMAIL PROTECTED] To: George Nychis [EMAIL PROTECTED] Cc: Bill Stevenson [EMAIL PROTECTED]; discuss-gnuradio@gnu.org Sent: Thursday, November 20, 2008 9:48:52 PM Subject: Re: [Discuss-gnuradio] inconsistency in the PER versus distance using

Re: [Discuss-gnuradio] does USRP need some warm up before it gets into its normal state?

2008-11-25 Thread Bill Stevenson
- Forwarded Message From: Bill Stevenson [EMAIL PROTECTED] To: George Nychis [EMAIL PROTECTED] Sent: Tuesday, November 25, 2008 5:16:43 PM Subject: Re: [Discuss-gnuradio] does USRP need some warm up before it gets into its normal state? From

Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

2008-11-25 Thread Bill Stevenson
- Forwarded Message From: Bill Stevenson [EMAIL PROTECTED] To: Zenny Zhang [EMAIL PROTECTED] Sent: Tuesday, November 25, 2008 9:47:40 PM Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio From: Zenny Zhang [EMAIL PROTECTED

Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

2008-11-25 Thread Bill Stevenson
- Forwarded Message From: Bill Stevenson [EMAIL PROTECTED] To: Johnathan Corgan [EMAIL PROTECTED] Sent: Tuesday, November 25, 2008 9:43:28 PM Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio From: Johnathan Corgan [EMAIL

Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

2008-11-25 Thread Bill Stevenson
From: Johnathan Corgan [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Sent: Tuesday, November 25, 2008 11:29:06 PM Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio On Tue, 2008-11-25 at 18:43 -0800, Bill Stevenson wrote: OMG

Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

2008-11-25 Thread Bill Stevenson
From: Bill Stevenson [EMAIL PROTECTED] To: Johnathan Corgan [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Tuesday, November 25, 2008 11:43:30 PM Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

[Discuss-gnuradio] does USRP need some warm up before it gets into its normal state?

2008-11-20 Thread Bill Stevenson
Hello, all! I am using demo file benchmark_tx.py and benchmark_rx.py to test the average PER at a certain distance. Whenever I initiated a test, the first two or three PER varied violently. For example, the expected PER is around 4%, in the first three tests, PER might be 30% and after the

Re: [Discuss-gnuradio] does USRP need some warm up before it gets into its normal state?

2008-11-20 Thread Bill Stevenson
From: George Nychis [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Thursday, November 20, 2008 8:17:17 PM Subject: Re: [Discuss-gnuradio] does USRP need some warm up before it gets into its normal state? Thank you

[Discuss-gnuradio] inconsistency in the PER versus distance using USRP

2008-11-20 Thread Bill Stevenson
Hello, everybody! I am using two USRP to find the average PER at a certain distance, but the average PER at a certain distance seems to be varying every day. Yesterday, the PER was around 5% when two usprs were 10 feet apart, but today the PER was around 2.5%  which has been diminished by 50%!

Re: [Discuss-gnuradio] does USRP need some warm up before it gets into its normal state?

2008-11-20 Thread Bill Stevenson
From: George Nychis [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Thursday, November 20, 2008 9:04:34 PM Subject: Re: [Discuss-gnuradio] does USRP need some warm up before it gets into its normal state? Thank you

[Discuss-gnuradio] How to bypass the filter on RXF2400 daughterboard

2008-11-12 Thread Bill Stevenson
Hi, all!!! I have read the manual of the RXF2400 and noticed that there is a filter restricting the receiving bandwidth to be within ISM bandwidth. But in our case, we need to work outside 802.11 band to avoid interference from 802.11, how can we bypass that filter using software? Thanks a

[Discuss-gnuradio] what will be the real transmit power in Watt when we change the tx-amplitude in software

2008-11-12 Thread Bill Stevenson
Hello, everyone! I am working on the benchmark_tx.py file, I know the transmit power for RXF2400 is 50mW. But is this number corresponding to the option -tx-amplitude setting to the default value 12000? If it is, i could calculate the real tx power after i changed the tx-amplitude parameter.

Re: [Discuss-gnuradio] How to bypass the filter on RXF2400 daughterboard

2008-11-12 Thread Bill Stevenson
From: Brian Padalino [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Wednesday, November 12, 2008 6:49:03 PM Subject: Re: [Discuss-gnuradio] How to bypass the filter on RXF2400 daughterboard On Wed, Nov 12, 2008 at 6

[Discuss-gnuradio] how to access a variable in Verilog code from Python or C++

2008-11-10 Thread Bill Stevenson
Hello, all! I have searched the whole mailing list and find out there is a variable in rssi.v file called rssi that is aimed to record rssi value, but i don't understand how to access or read that value from our python code, i am not very familiar with verilog, could someone please tell me how

Re: [Discuss-gnuradio] how to access a variable in Verilog code from Python or C++

2008-11-10 Thread Bill Stevenson
[EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Monday, November 10, 2008 9:28:28 PM Subject: Re: [Discuss-gnuradio] how to access a variable in Verilog code from Python or C++ In short, there is no supported mechanism in place to read it currently

Re: [Discuss-gnuradio] how to access a variable in Verilog code from Python or C++

2008-11-10 Thread Bill Stevenson
From: Eric Blossom [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: George P Nychis [EMAIL PROTECTED]; discuss-gnuradio@gnu.org Sent: Monday, November 10, 2008 10:04:55 PM Subject: Re: [Discuss-gnuradio] how to access a variable in Verilog code from

[Discuss-gnuradio] an interesting question about the log_rx_power option in receive_path.py file

2008-11-10 Thread Bill Stevenson
Hello, everyone! I found an interesting option in the receive_path.py file under the directory: gnuradio-examples/python/digital. I think asserting that option is aimed to record the received signal power and store the data into a file, but in my opinion, it is storing whatever it has received

Re: [Discuss-gnuradio] how to access a variable in Verilog code from Python or C++

2008-11-10 Thread Bill Stevenson
From: George P Nychis [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org; Eric Blossom [EMAIL PROTECTED] Sent: Monday, November 10, 2008 11:39:47 PM Subject: Re: [Discuss-gnuradio] how to access a variable in Verilog code from

[Discuss-gnuradio] a question about the Analog RSS I measued at the RX end

2008-11-08 Thread Bill Stevenson
Hello, all!!! I have a question of measuring RSSI on the USRP board. I searched the answer throughout the mailing list and I only found out three ways: 1) Analog RSSI (we can read it using AUX ADC) 2) Digital RSSI in FPGA (from output of ADCs) 3) Digital RSSI in host (computed however you like,

Re: [Discuss-gnuradio] a simple qustion about the attenuator for the SMA cable

2008-11-05 Thread Bill Stevenson
From: Dan Halperin [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Wednesday, November 5, 2008 1:08:41 PM Subject: Re: [Discuss-gnuradio] a simple qustion about the attenuator for the SMA cable -BEGIN PGP SIGNED

[Discuss-gnuradio] a simple qustion about the attenuator for the SMA cable

2008-11-04 Thread Bill Stevenson
Hello, all!!! I have a rudimentary question about the attenuator. When I was searching some questions in the archive, I found that some guys mentioned whentesting the transmitter and receiver for daughter board,the antenna should be connect by Tx/Rx SMA, the Tx and Rx can NOT be connected

Re: [Discuss-gnuradio] a question about benchmark_rx.py and benchmark_tx.py

2008-10-10 Thread Bill Stevenson
- Original Message From: Stefan Brüns [EMAIL PROTECTED] To: discuss-gnuradio@gnu.org Sent: Thursday, October 9, 2008 2:11:15 PM Subject: Re: [Discuss-gnuradio] a question about benchmark_rx.py and benchmark_tx.py On Thursday 09 October 2008 19:47:10 Bill Stevenson wrote: Hello

[Discuss-gnuradio] severe problem in benchmark_rx, benchmark_tx. file

2008-10-09 Thread Bill Stevenson
Hello, everyone! I think there is a bug in benchmark_rx.py and benchmark_tx.py files!!! Seriously! I am just running a demo program to realize communication between two usrps using benchmark_rx and benchmark_py under the Python/digital dir. But it appears that that program does not support

Re: [Discuss-gnuradio] how is interpolation rate dynamically set?

2008-09-27 Thread Bill Stevenson
Thanks! But the problem is we don't know what interpolation and samples per symbol are. How can you solve two arguments with only one equation? Bill - Original Message From: Brian Padalino [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent

[Discuss-gnuradio] calculaiton of bandwidth for USRP

2008-09-26 Thread Bill Stevenson
Hello all! I wanna make sure the way to calculate the transmission bandwidth for USRP system. As we know, the bitrate could be obtained based on bitrate=128/m/k, where m is the interpolation rate and k is the samples per symbol(suppose we use bpsk modulation), once we get bitrate, how to get

[Discuss-gnuradio] how is interpolation rate dynamically set?

2008-09-26 Thread Bill Stevenson
Hello, everybody! I am working on the demo file: gnuradio-examples/python/digital/benchmark_tx.py. In the file transmit_path.py, it is said specify bitrate. samples-per-symbol and interp/decim will be derived. How are interp/decim rate and samples-per-symbol derived respectively? what is the

Re: [Discuss-gnuradio] how is interpolation rate dynamically set?

2008-09-26 Thread Bill Stevenson
] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Friday, September 26, 2008 4:09:25 PM Subject: Re: [Discuss-gnuradio] how is interpolation rate dynamically set? On Fri, Sep 26, 2008 at 4:00 PM, Bill Stevenson [EMAIL PROTECTED] wrote: Hello, everybody! I am working on the demo

Re: [Discuss-gnuradio] question about the receiver sensitivity

2008-09-23 Thread Bill Stevenson
- Original Message From: Matt Ettus [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Sunday, September 21, 2008 10:26:32 PM Subject: Re: [Discuss-gnuradio] question about the receiver sensitivity Bill Stevenson wrote: Hello, all I am using

[Discuss-gnuradio] question about the receiver sensitivity

2008-09-17 Thread Bill Stevenson
Hello, all I am using USRP1 board with RFX Transceivers and I want to know the receiver sensitivity of the daugterboards. For example, for BER less than 1e-5 and data rate 54Mbps, the 802.11a standard specifies the receiver sensitivity to be at least -65dbm. Once the receiver sensitivity is

[Discuss-gnuradio] Need Help! Please!

2008-04-24 Thread Bill Stevenson
Hello, everyone I am now trying to check whether there is any nonlinear amplifier on the Tx daughterboard. Could anyone tell me which device finishes the task of nonlinear amplifying on the Tx board? Thank u It is very emergent! Thank u! Bill

Re: [Discuss-gnuradio] two questions about the general communication system

2008-04-13 Thread Bill Stevenson
Thank you George! I am just wondering when we calculate BER, how can we determine the value of bit energy? Thank u! Bill - Original Message From: George Nychis [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Sent: Sunday, April 13, 2008 1:01:21 PM Subject: Re: [Discuss-gnuradio

Re: [Discuss-gnuradio] two questions about the general communication system

2008-04-13 Thread Bill Stevenson
to get it? Thank you!!! Bill - Original Message From: Daniel Halperin [EMAIL PROTECTED] To: Brian Padalino [EMAIL PROTECTED] Cc: Bill Stevenson [EMAIL PROTECTED]; discuss-gnuradio@gnu.org Sent: Sunday, April 13, 2008 8:18:14 PM Subject: Re: [Discuss-gnuradio] two questions about

Re: [Discuss-gnuradio] two questions about the general communication system

2008-04-13 Thread Bill Stevenson
- Forwarded Message From: Bill Stevenson [EMAIL PROTECTED] To: George Nychis [EMAIL PROTECTED] Sent: Sunday, April 13, 2008 11:58:08 PM Subject: Re: [Discuss-gnuradio] two questions about the general communication system I meant: i was just simulating a simple communication system

[Discuss-gnuradio] how to transmit a DQPSK Modulated Sequence through USRP (how to handel the carrier?)

2008-04-13 Thread Bill Stevenson
Hello, everybody I am trying to transmit a DQPSK Modulated Sequence into sky through USRP, but after the symbols whose types are complex go through the pulse shaping filter, how can we put them onto a carrier, say cos(2*pi*fc*t). Should we multiply the complex symbols with cos(2*pi*fc*t) or

Re: [Discuss-gnuradio] two questions about the general communication system

2008-04-13 Thread Bill Stevenson
Thank u George!!! I know i have to calculate, but how much I set Eb/N0 to? Now i think it should be set to 1. Bill - Original Message From: George Nychis [EMAIL PROTECTED] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Monday, April 14, 2008 12:00:45 AM

Re: [Discuss-gnuradio] two questions about the general communication system

2008-04-13 Thread Bill Stevenson
Sorry! Below was a typo! Eb should be set to1, I think. Thank you Bill - Original Message From: Bill Stevenson [EMAIL PROTECTED] To: discuss-gnuradio@gnu.org Sent: Monday, April 14, 2008 12:27:58 AM Subject: Re: [Discuss-gnuradio] two questions about the general communication system

Re: [Discuss-gnuradio] how to transmit a DQPSK Modulated Sequence through USRP (how to handel the carrier?)

2008-04-13 Thread Bill Stevenson
, # symbol rate self._excess_bw, # excess bandwidth (roll-off factor) ntaps) self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps). thank u! Bill - Original Message From: Bill Stevenson [EMAIL PROTECTED] To: discuss

[Discuss-gnuradio] two questions about the general communication system

2008-04-12 Thread Bill Stevenson
Hello, everyone! Right now, I am trying to plot the graph of the BER vs Eb/N0. I have 2 questions: 1, I used a vector as the source, but how can we know or define the bit energy in the transmitted bit streams? (very important so as to get BER) 2, In GNURadio, is there a random number

Re: [Discuss-gnuradio] a question about wx.App()

2008-03-26 Thread Bill Stevenson
] To: Bill Stevenson [EMAIL PROTECTED] Cc: discuss-gnuradio@gnu.org Sent: Tuesday, March 25, 2008 8:54:18 AM Subject: Re: [Discuss-gnuradio] a question about wx.App() On Mar 25, 2008, at 1:13 AM, Bill Stevenson wrote: Oops! Could u tell me the location of _core_.py file? I just found out

[Discuss-gnuradio] a question about wx.App()

2008-03-24 Thread Bill Stevenson
hello, everybody! I am reading wfm_rcv_gui.py (usrp_wfm_rcv.py), but there are something confusing me! 1, there should be a class wx.App(),from which stdapp is derived! But where can I find it, what is the pathof it? i have checked out the

[Discuss-gnuradio] some question about the programme: wfm_rcv_gui.py (usrp_wfm_rcv.py)

2008-03-23 Thread Bill Stevenson
hello, everybody! I am reading wfm_rcv_gui.py (usrp_wfm_rcv.py), but there are something confusing me! 1, there are two classes in stdgui.py that have been referred to, stdframe and stdpanel. Both of them have used vbox to contain sth, but i cannot figure out what the respective usage of

[Discuss-gnuradio] how is the FPGA taking effect in USRP???!!!

2008-03-17 Thread Bill Stevenson
Hello, everyone I dug up the wfm_rcv_gui.py example file in order to penetrate the principle of GNURadio. But I have 2 questions about it: 1, there is a digital downconverter at the receiver, the function of down converting the signal is performed by the FPGA or the software on PC? 2, if it

Re: [Discuss-gnuradio] how to create a mainfile for communication blocks connection

2008-03-15 Thread Bill Stevenson
programs using python. Thank u!!! - Original Message From: Tim Meehan [EMAIL PROTECTED] To: Tom Rondeau [EMAIL PROTECTED] Cc: Bill Stevenson [EMAIL PROTECTED]; discuss-gnuradio@gnu.org Sent: Saturday, March 15, 2008 10:18:54 AM Subject: Re: [Discuss-gnuradio] how to create a mainfile

[Discuss-gnuradio] how to create a mainfile for communication blocks connection

2008-03-14 Thread Bill Stevenson
hello, everyone gnuradio is brand new to me. I want to simulate a very simple communication system using gnuradio. That is I will use a binary file as source, let it go through a dbpsk modulation model, AWGN channel and then demodulate it with dbpsk and store it in a sink file. Anyone can