Re: [Discuss-gnuradio] sell amplifier LNA duplexer
I do not know if the previous mail sent sucessfully or not. so reply again. Sorry about that. provide amplifier, LNA, duplexer Regards On Mon, Apr 28, 2014 at 10:48 AM, John Wu wrote: > Hi list, > If anyone needs amplifier, LNA, duplexer please contact me. I can make any > kind of amplifier, LNA, duplexer in any frequency. > > provide amplifier, LNA, duplexer > > Regards > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] WCDMA/UMTS receiver implementation
Michael is correct. before demodulation the received signal should be correlated. Michael, you said UMTS using scrambling code to do the timing recovery. But the scrambling code is to distinguish MS in the uplink, each MS use different scrambling code so I think the correlation shouldn't be related to distinguish user. Is there any document about UMTS timing recovery tech? Regards! On Tue, Oct 25, 2011 at 10:59 PM, Michael Johnson < mjohn...@epiq-solutions.com> wrote: > Hi Miguel, > > You're correct that the rake receiver combines multipath effects. If there > is little or no multipath then a rake receiver is not necessary. > > However, in any real world system a receiver needs to track timing offset > with respect to the transmitter. To do this the receiver needs to correlate > against the transmitted scrambling code at a series of lags to find the > peak. The result of these correlations is the channel impulse response, so > in reality implementing a rake receiver isn't much more difficult than a > single path receiver. > > There actually is a pilot "channel" on the uplink, just not a dedicated > one. For the standard QPSK uplink transmission, the control information is > on the Q (imaginary) axis (see 3GPP TS 25.213 section 4.2.1.1). Uplink > control channel formatting varies (see 3GPP TS 25.211 Section 5.2.11), but > at least some of the control bits in a frame are pilot bits. You can use > these bits to derotate the data channel, similar to the way the CPICH is > used on the downlink. > > Furthermore your signal processing chain isn't correct. You need to first > descramble, then despread, then you can use a QPSK slicer/demodulator. You > might consider first implementing a UMTS downlink receiever as it's similar > to the uplink, but a bit simpler. > > Finally, if you plan on using this receiver to receive actual UMTS uplink > signals keep in mind there are 2^24 possible codes (if the system is using > long codes). If you don't know the code number, it will take a very long > time to crunch through all the possibilities. > > Good luck! > > Michael Johnson > Software Radio Architect > Epiq Solutions > www.eqiqsolutions.com > >> ___ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Any one know how to detect CDMA2000 or EVDO pilot channel
Hi all, I am implementing CDMA2000 and EVDO phy layer. I know pilot channel is used to estimate channel and synchronization, but I don't know how to use it any one know how to detect pilot channel and how to take advantage of pilot channel to estimate channel and synchronization. Or just give a hint of how to find the method is helpful too. Thanks! ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] anyone know sine wave or square wave external clock is better for usrp
Thanks! On 4/23/11, Daniel Bartel wrote: > Hello. > >> I need to use external clock on usrp, there are two kinds of clock: sine >> wave and square wave. which >> is better for usrp? > > I used for my N210 a square wave signal, because it was suggested on > http://www.ettus.com/uhd_docs/manual/html/index.html > > Daniel > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] anyone know sine wave or square wave external clock is better for usrp
Hi all. I need to use external clock on usrp, there are two kinds of clock: sine wave and square wave. which is better for usrp? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] how to build std_xrxhb_xtx.rbf from uhd fpga source
Hi all, I compile the uhd fpga source then produce rbf like that: usrp_std.rbf. I don't know how many rx and tx this rbf can support. I guess the count of rx and tx it support is in some configure file. so how to config it if I want to build a 2rx and 2tx rbf? And I also need this config for inband world. Thanks! ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] confuse with the relation between ADC and DDC
the ADC and DDC scheme is shown in: http://swigerco.com/gnuradio/usrp_diagrams/mux_example_2.jpg >From what I know, DDC take a signal as an input and output the I and Q signals. But in usrp scheme DDC take I and Q signals from ADC as inputs. So what does ddc do in usrp? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] run two usrp app on two usrp meet: usrp_standard_common: failed to read FPGA cap register.
Hi all, I run two usrp apps on two usrp, each set the which usrp correctly, but meet usrp_standard_common: failed to read FPGA cap register when I run the second app. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Hi all, how to change usrp clock to 52M in gnuradio 3.3
Hi all, I want to change usrp clock to 52M, there are some document about change usrp clock in gnuradio 3.1 and 3.2 but none for 3.3. how to change usrp clock to 52M in gnuradio 3.3 ? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] compile fpga code error
Hi all, I use Qartus II version 9.1 web edition to compile fpga code, meet a lot of error. I enter "D:\fpga\usrp1\toplevel\usrp_inband_usb" then open "usrp_inband_usb.qpf" then I compile this project. error below: Error (10054): Verilog HDL File I/O error at adc_interface.v(3): can't open Verilog Design File "../../firmware/include/fpga_regs_common.v" Error (10054): Verilog HDL File I/O error at adc_interface.v(4): can't open Verilog Design File "../../firmware/include/fpga_regs_standard.v" Error (10170): Verilog HDL syntax error at adc_interface.v(31) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at adc_interface.v(34) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at adc_interface.v(36) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at adc_interface.v(38) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at adc_interface.v(40) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at adc_interface.v(53) near text ")"; expecting ".", or an operand Error (10112): Ignored design unit "adc_interface" at adc_interface.v(6) due to previous errors Error (10054): Verilog HDL File I/O error at io_pins.v(22): can't open Verilog Design File "../../firmware/include/fpga_regs_common.v" Error (10054): Verilog HDL File I/O error at io_pins.v(23): can't open Verilog Design File "../../firmware/include/fpga_regs_standard.v" Error (10170): Verilog HDL syntax error at io_pins.v(42) near text ":"; expecting an operand Error (10170): Verilog HDL syntax error at io_pins.v(44) near text ":"; expecting "endcase" Error (10170): Verilog HDL syntax error at io_pins.v(46) near text ":"; expecting "endcase" Error (10170): Verilog HDL syntax error at io_pins.v(48) near text ":"; expecting "endcase" Error (10112): Ignored design unit "io_pins" at io_pins.v(25) due to previous errors Error (10170): Verilog HDL syntax error at master_control.v(42) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(50) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(51) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(88) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(89) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(90) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(91) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(93) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(105) near text ":"; expecting an operand Error (10170): Verilog HDL syntax error at master_control.v(107) near text ":"; expecting "endcase" Error (10170): Verilog HDL syntax error at master_control.v(109) near text ":"; expecting "endcase" Error (10170): Verilog HDL syntax error at master_control.v(111) near text ":"; expecting "endcase" Error (10170): Verilog HDL syntax error at master_control.v(120) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(121) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(122) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(124) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(125) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(126) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at master_control.v(128) near text ")"; expecting ".", or an operand Error (10054): Verilog HDL File I/O error at rx_buffer.v(25): can't open Verilog Design File "../../firmware/include/fpga_regs_common.v" Error (10054): Verilog HDL File I/O error at rx_buffer.v(26): can't open Verilog Design File "../../firmware/include/fpga_regs_standard.v" Error (10170): Verilog HDL syntax error at rx_buffer.v(66) near text ")"; expecting ".", or an operand Error (10112): Ignored design unit "rx_buffer" at rx_buffer.v(28) due to previous errors Error (10054): Verilog HDL File I/O error at usrp_inband_usb.v(26): can't open Verilog Design File "../../../firmware/include/fpga_regs_common.v" Error (10054): Verilog HDL File I/O error at usrp_inband_usb.v(27): can't open Verilog Design File "../../../firmware/include/fpga_regs_standard.v" Error (10170): Verilog HDL syntax error at usrp_inband_usb.v(198) near text ")"; expecting ".", or an operand Error (10170): Verilog HDL syntax error at usrp_inband_usb.v(299) near text ","; expecting ".", or an operand
[Discuss-gnuradio] where to get inband_2rxhb_2tx.rbf and inband_1rxhb_1tx.rbf source
Hi all, I want to make some modify on fpga code, anyone know where to get inband_2rxhb_2tx.rbf and inband_1rxhb_1tx.rbf source to reference. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] about the channel distinguish when read from multi channel
Hi all, I create a standard rx which contain 2 channels for two rx daughter board. Now I use read function read the sampled data, and deinterleave the data, but which channel is related to which daughter board, and the deinterleaved data is related to which channel? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] cant create two rx
Hi all, I need to use two rx in my project, however I can not create two rx. My code create rx is bellow: Rx1 = usrp_standard_rx_sptr(usrp_standard_rx::make(0,decimRate,1,-1, usrp_standard_rx::FPGA_MODE_NORMAL, 1024,16*8,rbf)); Rx2 = usrp_standard_rx_sptr(usrp_standard_rx::make(0,decimRate,1,-1, usrp_standard_rx::FPGA_MODE_NORMAL, 1024,16*8,rbf)); the error: usrp_open_interface:usb_claim_interface: failed interface 2 could not claim interface 2: Device or resource busy usrp_basic_rx: can't open rx interface ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] what is the different between usrp_prims_libusb0 and usrp_prims_libusb1?
what is the different between usrp_prims_libusb0 and usrp_prims_libusb1? what case are they used? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] If uhd support a more precise In band signaling timestamp in the resolution 1ns or 10ns?
Hi Matt, I recently learn the uhd project which contain a double type timestamp in band signaling. I want to know if this change really take a more precise timestamp from usrp hardware or it just an interface change to meet other hardware? For now, I want to measure the time of flight to count a distance, so the timestamp should be as precise as at least 100ns to meet my need. Thanks! ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Re: hi all, I want to support fpga to add a timestamp when the usrp send and receive data package
Hi all, I learn from some document that usrp have take a timestamp in nanosecond with the data package. Can anyone tell me more detail about that? Since I have not receive usrp board I can not do the experiment to confirm it. Thanks. On Thu, Jun 3, 2010 at 11:40 AM, John Wu wrote: > Hi all, > I need to measure the time of flight with the accuracy in nanosecond, now I > found an ic that can measure the time in ns. So now I want to support fpga > to read the timestamp when receive and send a data package with modifying > the fpga firmware. Can someone estimate whether the usrp or usrp2 can > achieve my goal without the performance drop? And is there any usrp fpga > source document available? > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] hi all, I want to support fpga to add a timestamp when the usrp send and receive data package
Hi all, I need to measure the time of flight with the accuracy in nanosecond, now I found an ic that can measure the time in ns. So now I want to support fpga to read the timestamp when receive and send a data package with modifying the fpga firmware. Can someone estimate whether the usrp or usrp2 can achieve my goal without the performance drop? And is there any usrp fpga source document available? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Hi all, how to use usrp and gnuradio support triangulation to locate a cell phone
hi Harley, I think I can bypass establishing communication with the cell phone I want to track, I can use app like airprobe to sniff the cell phone radio. So now the main task is find a good method to locate it. For now there are two methods. First is use three receiver receive the TDOA and use hyperbolic to locate the cell phone. this method need the three receivers synchronize the timer very accurate. the second is use two antenna arrays to use AOA to locate the cell phone, you have mentioned that you have support the antenna arrays in usrp to locate BTS. I want to build my receiver as a handset but if I choose AOA method the distance may be several meters between two antennas in a antenna array. So if it possible to reduce the distance between two antennas in a antenna array and keep the location accuracy? What is the smallest distance? On Wed, May 26, 2010 at 10:22 PM, Harley Myler wrote: > On May 26, 2010, at 5:25 AM, John Wu wrote: > > > Harley Thanks > > I find another way call hyperbolic location method that is more accurate > to locate a cell phone. and what u said is correct, I must first get a > phone's communication. Now the easier way what I know is using openbts and > usrp build a gsm bts to communicate with cell phone. Am I right? > > That would be a good start since most of the complicated part (handset to > USRP link), IMO, is done. > > Harley > > > > > > CONFIDENTIALITY: Any information contained in this e-mail (including > attachments) is the property of The State of Texas and unauthorized > disclosure or use is prohibited. Sending, receiving or forwarding of > confidential, proprietary and privileged information is prohibited under > Lamar Policy. If you received this e-mail in error, please notify the sender > and delete this e-mail from your system. > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Hi all, how to use usrp and gnuradio support triangulation to locate a cell phone
Harley Thanks I find another way call hyperbolic location method that is more accurate to locate a cell phone. and what u said is correct, I must first get a phone's communication. Now the easier way what I know is using openbts and usrp build a gsm bts to communicate with cell phone. Am I right? On Tue, May 25, 2010 at 8:11 PM, Harley Myler wrote: > > On May 24, 2010, at 10:06 PM, John Wu wrote: > > > Hi all, I am a fresh on usrp and gnuradio, now I want to use them to > support locate a cell phone, and what I know is locate a cell phone need to > use triangulation method. Anyone know if gnuradio contain triangulation > block or any open triangulation algorithm available? > > > > Thanks! > > ___ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > John, the dilemma you will face in locating a cell phone will be the coding > that it incorporates as it communicates with towers. If you know the signal > that a particular phone emits, or of you can establish communication with > one, then the direction finding should be trivial. I am working on ADF now, > but my interest is in locating the towers, not the phones. > > What you may need to do is set up your GR to act like a tower, establish > comm with a phone and then use an antenna array to determine it's location. > I just recently managed to squeeze out of the Ettus group how to control > something with the GPIO so that I can manipulate an antenna array, so you > are pretty much on your own for anything beyond the example programs in the > existing software. > > I did not understand the youtube popcorn thing. > > > > > CONFIDENTIALITY: Any information contained in this e-mail (including > attachments) is the property of The State of Texas and unauthorized > disclosure or use is prohibited. Sending, receiving or forwarding of > confidential, proprietary and privileged information is prohibited under > Lamar Policy. If you received this e-mail in error, please notify the sender > and delete this e-mail from your system. > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] can not open link "http://gnuradio.org/svn/usrp-hw/trunk/USRP_REV_4_2/"
Hi all, I want to get usrp board schematic, and this link is usrp board schematic pdf download link, however it can't be open. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Hi all, how to use usrp and gnuradio support triangulation to locate a cell phone
Hi all, I am a fresh on usrp and gnuradio, now I want to use them to support locate a cell phone, and what I know is locate a cell phone need to use triangulation method. Anyone know if gnuradio contain triangulation block or any open triangulation algorithm available? Thanks! ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Hi all, how to use gnuradio to get the distance between a gsm mobil phone and the usrp receiver?
Hi all, how to use gnuradio to get the distance between a gsm mobil phone and the usrp receiver? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Hi all, how to use gnuradio to get the distance between a special gsm phone and the usrp hardware?
Hi all, i am going to support this feature above gnuradio, but i know little about gnuradio before. What is the correct way to support this feature? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
