# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md [Latest](https://www.ruby-forum.com/latest.md) · [Categories](https://www.ruby-forum.com/categories.md) · [Tags](https://www.ruby-forum.com/tags.md) --- ## [Rts/cts on gnuradio](https://www.ruby-forum.com/t/rts-cts-on-gnuradio/241603)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [December 8, 2024, 9:48pm UTC](https://www.ruby-forum.com/t/rts-cts-on-gnuradio/241603 "2024-12-08T21:48:12Z")
Hello all, I am trying to implement rts/cts handshake scenario on gnuradio prior to packet transmission. I intend to work on gr-mac which was created by john malsbury, i.e by adding the functions on the simple mac bl… --- ## [GMSK demodulation](https://www.ruby-forum.com/t/gmsk-demodulation/264925)
**Author:** [@panagiotispir](https://www.ruby-forum.com/u/panagiotispir)\ **Replies:** 0\ **Last updated:** [July 21, 2024, 6:39pm UTC](https://www.ruby-forum.com/t/gmsk-demodulation/264925 "2024-07-21T18:39:09Z")
I am new in gnuradio programming. I am struggled all these days with GMSK demodulation and finally I am not sure if the flow and the parametarization of my gnu radio schema is correct and the demodulation of GMSK Record… --- ## [usrp\_b210\_GRC=\>RuntimeError: CODEC loopback test failed](https://www.ruby-forum.com/t/usrp-b210-grc-runtimeerror-codec-loopback-test-failed/261425)
**Author:** [@taha.zand](https://www.ruby-forum.com/u/taha.zand)\ **Replies:** 1\ **Last updated:** [May 12, 2024, 12:28pm UTC](https://www.ruby-forum.com/t/usrp-b210-grc-runtimeerror-codec-loopback-test-failed/261425 "2024-05-12T12:28:00Z")
Hi all I’m a SDR beginner and i have a usrp b210. I need to implement a fft block on the fpga inside the usrp and pc gets the data in freq domain. I designed my fft using xilinx IP core and place it in b200\_io module wh… --- ## [WCDMA with USRP](https://www.ruby-forum.com/t/wcdma-with-usrp/63002)
**Author:** [@Jens\_E](https://www.ruby-forum.com/u/Jens_E)\ **Replies:** 2\ **Last updated:** [April 24, 2024, 11:12am UTC](https://www.ruby-forum.com/t/wcdma-with-usrp/63002 "2024-04-24T11:12:47Z")
Hello everybody, I did some work the last couple of weeks implementing the cell search algorithm and despreading of basic channels for WCDMA (UMTS) using the USRP in Matlab. Unfortunately I do not have the copyright… --- ## [How to use 2 tx channels in osmocom sink block](https://www.ruby-forum.com/t/how-to-use-2-tx-channels-in-osmocom-sink-block/264171)
**Author:** [@hrj\_01](https://www.ruby-forum.com/u/hrj_01)\ **Replies:** 1\ **Last updated:** [March 20, 2024, 11:32am UTC](https://www.ruby-forum.com/t/how-to-use-2-tx-channels-in-osmocom-sink-block/264171 "2024-03-20T11:32:33Z")
I am trying to send audio signal at 2 different channels(96 MHz and 99 MHz) using sdr but not able to transmit at two different channels at same time. Anyone knows how to use two TX channels in gnu radio? please in deta… --- ## [Problem GNU Radio Packet receiver](https://www.ruby-forum.com/t/problem-gnu-radio-packet-receiver/262561)
**Author:** [@Craig75](https://www.ruby-forum.com/u/Craig75)\ **Replies:** 1\ **Last updated:** [December 1, 2023, 11:58pm UTC](https://www.ruby-forum.com/t/problem-gnu-radio-packet-receiver/262561 "2023-12-01T23:58:55Z")
I had a problem to the receiver using GNU Radio. I am trying to receive the packet using a product called ax2150 in Gomspace and USRP. Linux Com(GNU Radio) - USRP - AX2150 The GNU Radio block is configured by referrin… --- ## [Vector sink data](https://www.ruby-forum.com/t/vector-sink-data/222047)
**Author:** [@aris](https://www.ruby-forum.com/u/aris)\ **Replies:** 8\ **Last updated:** [November 6, 2023, 2:20pm UTC](https://www.ruby-forum.com/t/vector-sink-data/222047 "2023-11-06T14:20:12Z")
Greetings, I would like to ask you how to read the data stored in a vector sink. I tried the solutions I found in the discussion list. You can see some part of my python code below. ###################################… --- ## [Need help WCDMA RECEIVER](https://www.ruby-forum.com/t/need-help-wcdma-receiver/264296)
**Author:** [@Gand\_paolo](https://www.ruby-forum.com/u/Gand_paolo)\ **Replies:** 0\ **Last updated:** [September 18, 2023, 3:17am UTC](https://www.ruby-forum.com/t/need-help-wcdma-receiver/264296 "2023-09-18T03:17:54Z")
Hello. I am work with gnuradio 3.10 . I need a WCDMA receiver, but I can’t find it on GitHub. Could you help me please --- ## [Signal delay or replay](https://www.ruby-forum.com/t/signal-delay-or-replay/264086)
**Author:** [@azizkilic](https://www.ruby-forum.com/u/azizkilic)\ **Replies:** 0\ **Last updated:** [July 7, 2023, 11:27am UTC](https://www.ruby-forum.com/t/signal-delay-or-replay/264086 "2023-07-07T11:27:41Z")
I have 3 signals example 100MHz 300MHz and 500MHz. I want to read and record these 3 signals, provided that the signals and gaps are 1 second. How can I do that ? I used the delay diagram, but there was no delay as I wan… --- ## [How to use bt-100 with bladerf and gnuradio?](https://www.ruby-forum.com/t/how-to-use-bt-100-with-bladerf-and-gnuradio/264067)
**Author:** [@hrj\_01](https://www.ruby-forum.com/u/hrj_01)\ **Replies:** 0\ **Last updated:** [July 5, 2023, 11:33am UTC](https://www.ruby-forum.com/t/how-to-use-bt-100-with-bladerf-and-gnuradio/264067 "2023-07-05T11:33:56Z")
I want to ask how to use bt-100 power amplifier with bladeRF? cause when i try to enable it is enabling but not working for transmission of signal and in GRC when i run the flowgraph i get error like No devices available… --- ## [Generate strong noise using bladerf 2.0 micro xA9](https://www.ruby-forum.com/t/generate-strong-noise-using-bladerf-2-0-micro-xa9/264009)
**Author:** [@hrj\_01](https://www.ruby-forum.com/u/hrj_01)\ **Replies:** 0\ **Last updated:** [June 20, 2023, 11:54am UTC](https://www.ruby-forum.com/t/generate-strong-noise-using-bladerf-2-0-micro-xa9/264009 "2023-06-20T11:54:15Z")
hi, i am at learning stage in gnu radio. And i want to check how much strong noise can be produce using bladerf 2.0 micro xA9 hardware with GNU radio companion? do i need to use power amplifier to produce strong noise? --- ## [Coding of 8psk signal in GNU radio and its decoding in Matlab](https://www.ruby-forum.com/t/coding-of-8psk-signal-in-gnu-radio-and-its-decoding-in-matlab/263872)
**Author:** [@Frog](https://www.ruby-forum.com/u/Frog)\ **Replies:** 0\ **Last updated:** [May 20, 2023, 12:41pm UTC](https://www.ruby-forum.com/t/coding-of-8psk-signal-in-gnu-radio-and-its-decoding-in-matlab/263872 "2023-05-20T12:41:46Z")
I record an 8PSK signal using the following scheme (1): After that, I open the recorded signals in Matlab and add them (signal = re + 1i\*Im): After that, I demodulate.The original signal differs from the demodulated… --- ## [What is the Frequency of Vector Source](https://www.ruby-forum.com/t/what-is-the-frequency-of-vector-source/263467)
**Author:** [@mohdyaser](https://www.ruby-forum.com/u/mohdyaser)\ **Replies:** 0\ **Last updated:** [November 29, 2022, 9:46am UTC](https://www.ruby-forum.com/t/what-is-the-frequency-of-vector-source/263467 "2022-11-29T09:46:00Z")
I’m trying to replicate a GNSS (Galileo) signal, I have the PRN code which is a 1.023 mega bit per second, and a navigation message which is a 50 bps. How can I force the Vector Source block to the frequency that I want,… --- ## [IShort to Complex is causing this code to save all zeros?](https://www.ruby-forum.com/t/ishort-to-complex-is-causing-this-code-to-save-all-zeros/263782)
**Author:** [@vinci.22](https://www.ruby-forum.com/u/vinci.22)\ **Replies:** 0\ **Last updated:** [April 12, 2023, 6:34pm UTC](https://www.ruby-forum.com/t/ishort-to-complex-is-causing-this-code-to-save-all-zeros/263782 "2023-04-12T18:34:24Z")
I have a simple GNU radio code for recording data from an SDR and saving the samples to files. It records data in IShort format and saves directly to the hard drive as IShort. Amplitude scaling to the data must be done i… --- ## [Stream data read from source file](https://www.ruby-forum.com/t/stream-data-read-from-source-file/263642)
**Author:** [@nauritius](https://www.ruby-forum.com/u/nauritius)\ **Replies:** 0\ **Last updated:** [February 7, 2023, 6:52pm UTC](https://www.ruby-forum.com/t/stream-data-read-from-source-file/263642 "2023-02-07T18:52:19Z")
Hi everyone, this is my first post here. My goal is to read data held in binary file, decode them and stream to block’s output. Data are just sequence of floats. Moreover I also have a sampling rate, at which they were … --- ## [Fsk modulation](https://www.ruby-forum.com/t/fsk-modulation/227780)
**Author:** [@juba08](https://www.ruby-forum.com/u/juba08)\ **Replies:** 1\ **Last updated:** [December 11, 2022, 9:11am UTC](https://www.ruby-forum.com/t/fsk-modulation/227780 "2022-12-11T09:11:35Z")
Hello, I am new to gnu radio and i need to make fsk modulation using grc. i fould some fsk codes but they are for old usrp(usrp1) and we use usrp n210 in laboratory. i am trying to make fsk for months but i dont know … --- ## [FSK MOD/DEMOD sample code](https://www.ruby-forum.com/t/fsk-mod-demod-sample-code/179422)
**Author:** [@DavidCanada](https://www.ruby-forum.com/u/DavidCanada)\ **Replies:** 1\ **Last updated:** [December 11, 2022, 8:49am UTC](https://www.ruby-forum.com/t/fsk-mod-demod-sample-code/179422 "2022-12-11T08:49:03Z")
Hi I’m a student and I’m really interested in understanding the FSK demodulation/modulation software techniques with GNURADIO and the USRP. I have a USRP with TVRX board and a DBSRX board. I’m very newbieto this SDR … --- ## [Wireless FSK immediate message system](https://www.ruby-forum.com/t/wireless-fsk-immediate-message-system/263500)
**Author:** [@roehai12](https://www.ruby-forum.com/u/roehai12)\ **Replies:** 0\ **Last updated:** [December 11, 2022, 8:33am UTC](https://www.ruby-forum.com/t/wireless-fsk-immediate-message-system/263500 "2022-12-11T08:33:51Z")
Hi guys, Im 19 and trying to get into the world of sdr ( in college) so I set a target to myself: Create fully functional wireless FSK immediate message system with 2 usrp’s (using gnuradio). Has anyone ever done this … --- ## [NO UHD devices found for E100](https://www.ruby-forum.com/t/no-uhd-devices-found-for-e100/242460)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 4\ **Last updated:** [November 23, 2022, 11:49am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-for-e100/242460 "2022-11-23T11:49:01Z")
(This message was also posted on USRP-users mailing list.) I am trying to connect USRP E100 to my PC, ubuntu 14.04 But I am having a difficulty on finding uhd device. The followings what I have done til now: $ sudo e… --- ## [Issues in storing data from file sink in gnu radio](https://www.ruby-forum.com/t/issues-in-storing-data-from-file-sink-in-gnu-radio/263275)
**Author:** [@SiriusWT](https://www.ruby-forum.com/u/SiriusWT)\ **Replies:** 0\ **Last updated:** [September 21, 2022, 11:53am UTC](https://www.ruby-forum.com/t/issues-in-storing-data-from-file-sink-in-gnu-radio/263275 "2022-09-21T11:53:12Z")
Hi, i’m trying to store some fft data in a csv file format using the File Sink block. The OS is linux, and therefore i’m using the LibreOffice Calc version(6.4.7.2) in which i have selected the csv format to store the d… --- ## [AIS processing. GNURadio](https://www.ruby-forum.com/t/ais-processing-gnuradio/263270)
**Author:** [@DennySok](https://www.ruby-forum.com/u/DennySok)\ **Replies:** 0\ **Last updated:** [September 20, 2022, 2:06pm UTC](https://www.ruby-forum.com/t/ais-processing-gnuradio/263270 "2022-09-20T14:06:30Z")
Hello! I have an AIS signal receiver circuit (https://oz9aec.net/radios/gnu-radio/a-2-channel-ais-receiver-using-rtl-sdr-and-gnuais ). Please help me change the scheme for processing .wav files. I attach the signal reco… --- ## [Bricking and recovery of N210](https://www.ruby-forum.com/t/bricking-and-recovery-of-n210/205984)
**Author:** [@luislavena](https://www.ruby-forum.com/u/luislavena)\ **Replies:** 6\ **Last updated:** [August 20, 2022, 5:43pm UTC](https://www.ruby-forum.com/t/bricking-and-recovery-of-n210/205984 "2022-08-20T17:43:42Z")
Hi folks, We’ve recently received an N210. I updated the firmware successfully a few times, but then usrp\_n2xx\_net\_burner.py crashed. I immediately tried rewriting the image, and all seemed to go fine, however both d… --- ## [ImportError:undefined symbol: fftw\_execute](https://www.ruby-forum.com/t/importerror-undefined-symbol-fftw-execute/262953)
**Author:** [@yu\_09](https://www.ruby-forum.com/u/yu_09)\ **Replies:** 0\ **Last updated:** [May 27, 2022, 3:20am UTC](https://www.ruby-forum.com/t/importerror-undefined-symbol-fftw-execute/262953 "2022-05-27T03:20:58Z")
I am trying to build a sink block with FFT and Kurtosis capability using gr\_modtool. The code itself can be compiled without error. But when I run the flow graph in GRC, it produces following error message. Question: … --- ## [Support To Transmit DRM and DRM+ in GNU Radio](https://www.ruby-forum.com/t/support-to-transmit-drm-and-drm-in-gnu-radio/262947)
**Author:** [@vestel5g](https://www.ruby-forum.com/u/vestel5g)\ **Replies:** 0\ **Last updated:** [May 26, 2022, 5:04am UTC](https://www.ruby-forum.com/t/support-to-transmit-drm-and-drm-in-gnu-radio/262947 "2022-05-26T05:04:46Z")
Dear Experts, I am doing projects to transmit DRM and DRM+ with multi channels by GNU Radio with SDR USRP B210. I work around and I’m unable to complete my project.Please support me to complete m… --- ## [Support To Transmit DAB and DAB+ in GNU Radio](https://www.ruby-forum.com/t/support-to-transmit-dab-and-dab-in-gnu-radio/262946)
**Author:** [@vestel5g](https://www.ruby-forum.com/u/vestel5g)\ **Replies:** 0\ **Last updated:** [May 26, 2022, 4:51am UTC](https://www.ruby-forum.com/t/support-to-transmit-dab-and-dab-in-gnu-radio/262946 "2022-05-26T04:51:14Z")
Dear Experts, I am doing projects to transmit DAB and DAB+ with multi channels by GNU Radio with SDR USRP B210. I work around and I’m unable to complete my project.Please support me to complete m… --- ## [AttributeError: module 'Kurtosis' has no attribute 'Kurtosis\_c'](https://www.ruby-forum.com/t/attributeerror-module-kurtosis-has-no-attribute-kurtosis-c/262914)
**Author:** [@yu\_09](https://www.ruby-forum.com/u/yu_09)\ **Replies:** 0\ **Last updated:** [May 19, 2022, 12:18am UTC](https://www.ruby-forum.com/t/attributeerror-module-kurtosis-has-no-attribute-kurtosis-c/262914 "2022-05-19T00:18:40Z")
I am trying to build a sink block with FFT and Kurtosis capability using gr\_modtool. The code itself can be compiled without error. But when I run the flow graph in GRC, it produces following error message. Generating… --- ## [How to send binary files through USRP and RTL in GNU Radio](https://www.ruby-forum.com/t/how-to-send-binary-files-through-usrp-and-rtl-in-gnu-radio/262815)
**Author:** [@Jorgealza9206](https://www.ruby-forum.com/u/Jorgealza9206)\ **Replies:** 0\ **Last updated:** [April 27, 2022, 4:08pm UTC](https://www.ruby-forum.com/t/how-to-send-binary-files-through-usrp-and-rtl-in-gnu-radio/262815 "2022-04-27T16:08:08Z")
Hi, guys, I’m beginner. I appreciate if any of you have worked with GNU RADIO, for the transmission and reception of files, I need to send an identical binary file in the Source to the Destination. I am working with a … --- ## [Make error in Gnu Radio](https://www.ruby-forum.com/t/make-error-in-gnu-radio/261963)
**Author:** [@MarioM](https://www.ruby-forum.com/u/MarioM)\ **Replies:** 1\ **Last updated:** [March 21, 2022, 5:09pm UTC](https://www.ruby-forum.com/t/make-error-in-gnu-radio/261963 "2022-03-21T17:09:15Z")
Hey everyone, I have a problem. I am following the OOT(OutofTree) module tutorial, Link: OutOfTreeModules - GNU Radio and I am at the part it involves using the cmake command line. I have followed everything it said an… --- ## [Phase Coherency Multichannel RTL-SDR GNU radio](https://www.ruby-forum.com/t/phase-coherency-multichannel-rtl-sdr-gnu-radio/262537)
**Author:** [@Ludwig](https://www.ruby-forum.com/u/Ludwig)\ **Replies:** 0\ **Last updated:** [February 23, 2022, 5:06pm UTC](https://www.ruby-forum.com/t/phase-coherency-multichannel-rtl-sdr-gnu-radio/262537 "2022-02-23T17:06:24Z")
Hi ! I’m a beginner with GNU Radio and SDR like RTL-SDR, but I’m doing my best to understand how to use them ! I want to do goniometry / direction finding / passive radar with these equipments. But first I need to foc… --- ## [Ofdm over gnu radio](https://www.ruby-forum.com/t/ofdm-over-gnu-radio/262469)
**Author:** [@ahmad-sho](https://www.ruby-forum.com/u/ahmad-sho)\ **Replies:** 0\ **Last updated:** [January 31, 2022, 10:27am UTC](https://www.ruby-forum.com/t/ofdm-over-gnu-radio/262469 "2022-01-31T10:27:16Z")
Hi, I’m trying to use the ofdm example to create a code via GRC that: create a random bitstream modulate it into ofdm send it over USRP (USRP2/N-Series device) receive it over another USRP demodulate it get the origin… [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=1)