[Discuss-gnuradio] Received data rate for wifi_rx in gnuradio
Hi, I have been wondering and trying to figure out a way to calculate data rate of the wifi_rx. One way that I thought was to check the captured statistics of the wireshark (.pcap) file generated by wifi_rx. However, these are far lower than the transmitter rate which is set to 5Mbps and the receiver is based on the gr-ieee802.11. Could anyone point me in the right direction for calculating data-rate in gnuradio. Thanks SG ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Received data rate for wifi_rx in gnuradio
Hi, I have been wondering and trying to figure out a way to calculate data rate of the wifi_rx. One way that I thought was to check the captured statistics of the wireshark (.pcap) file generated by wifi_rx. However, these are far lower than the transmitter rate which is set to 5Mbps and the receiver is based on the gr-ieee802.11. Could anyone point me in the right direction for calculating data-rate in gnuradio. Thanks SG ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Received data rate for wifi_rx in gnuradio
Thanks for your reply. So in the considered system, transmitter is continuously broadcasting data at the rate 5Mbps using ieee802.11 protocol (BPSK modulation is used). The WiFi receiver is receiving continuously using LimeSDR Mini and I am trying to capture data rate after the decode and demodulation of received signal. It is receiving the broadcasted data at a significantly lower rate (based on wireshark capture statistics) for which I am unable to identify the reason. So I was wondering if looking at wireshark file is an accurate way to approach this data-rate calculation problem or something more appropriate exists. Thanks SG On 29/05/19 9:35 PM, Torell, Kent L wrote: Wi-fi is short burst messages. So the modulation data rate is high, but the effective user data rate is low. 'Data rate' is very context dependent. -Original Message- From: Discuss-gnuradio On Behalf Of SG Sent: Wednesday, May 29, 2019 1:26 AM To: discuss-gnuradio@gnu.org Subject: [Discuss-gnuradio] Received data rate for wifi_rx in gnuradio Hi, I have been wondering and trying to figure out a way to calculate data rate of the wifi_rx. One way that I thought was to check the captured statistics of the wireshark (.pcap) file generated by wifi_rx. However, these are far lower than the transmitter rate which is set to 5Mbps and the receiver is based on the gr-ieee802.11. Could anyone point me in the right direction for calculating data-rate in gnuradio. Thanks SG ___ 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] Saving PMT messages to file.
Hello all! I have been trying to save the messages generated after the demodulation and decode of the WiFi received signal to a file but file sink is not compatible with message types. Is there a replacement for the deprecated message sink? Could anyone point me to the right direction. Thanks SG ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] GNURadio File meta Sink performance.
Hi all, I have been trying to capture data as well as meta data in file meta sink in GNURadio. When I run my gr-ieee802.11 receiver flowgraph with no file meta sink, it captures the signal transmitted by a dedicated source which is always turned on. However, when i just try to capture and store the data and metadata in file meta sink, it does not receive even a single packet. So i was wondering if the writing process to File meta sink in GNUradio is slow enough that it starts dropping packets or there is some other issue. Could anyone point me in right direction. Thanks and Regards SG ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] GNURadio File meta Sink performance.
Hi, Thanks for your reply. Now that since metadata can't be saved to a file, how can we keep track of timestamp of the received packets? I can use tag debug to display the timestamps of received signal but when flowgraph starts demodulating data it looses track of timestamp display on console. Is there a way to save timestamps or display timestamps without fail on console. Thanks and Regards SG ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] GNURadio File meta Sink performance.
I agree the problem is the amount of samples so I have dropped the idea of storing samples but is there a way to handle such sampling rates in gnuradio? I would like to know the time stamp of the data received which i am unable to access using tag debug. I don't know why but it suddenly stops displaying timestamps on the console while displaying the data decoded by wifi rx. Is there any other way to record timestamps of reception ? Thanks and Regards SG On 18/07/19 2:34 PM, Müller, Marcus (CEL) wrote: The problem is not the metadata, the problems is the sheer amount of samples. Best regards, Marcus On Thu, 2019-07-18 at 13:18 +0530, SG wrote: Hi, Thanks for your reply. Now that since metadata can't be saved to a file, how can we keep track of timestamp of the received packets? I can use tag debug to display the timestamps of received signal but when flowgraph starts demodulating data it looses track of timestamp display on console. Is there a way to save timestamps or display timestamps without fail on console. Thanks and Regards SG ___ 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] How to define maximum number of samples in Sync_Short used in IEEE802.11
Hi, I have been trying to run WiFi receiver on my SDR using GNURadio based approach developed by Bastian in gr-ieee802-11. However, I am not able to figure out the reason behind definition of Max_Samples=540*80 in sync_short.cc file. Could anyone help clarifying this to me. Thanks and Regards SG ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] How to define maximum number of samples in in Sync_Short used in IEEE802.11
Hi, I have been trying to run WiFi receiver on my SDR using GNURadio based approach developed by Bastian in gr-ieee802-11. However, I am not able to figure out the reason behind definition of Max_Samples=540*80 in sync_short.cc file. Could anyone help clarifying this to me. Thanks and Regards SG ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
LimeSDR Mini with gr-gsm
Hi, I am trying to use grgsm_scanner (https://gitlab.com/myriadrf/gr-gsm) with LimeSDR Mini for scanning and identifying the GSM frequency present and then live monitoring using grgsm_livemon for my project. I am running this in a loop where grgsm_scanner is called for identifying the present frequencies and then these frequencies are live monitored individually in a loop for 30 sec each by calling grgsm_livemon. This code is suppose to be exited from the terminal providing continuous scanning and monitoring unless interrupted. However, this loop is terminated after couple of iterations giving one of the following errors: * RuntimeError: boost::thread_resource_error: Resource temporarily unavailable * gr::vmcircbuf_sysv_shm:shmget(2): No space left on device gr::buffer::allocate buffer: failed to allocate buffer of size 64KB I have also tried setting kernel.shmmni=32000 which is suggested in the code but in vain. Are these errors related to each other? I am unable to resolve these errors for my code requiring continuous scanning and monitoring. Could anyone point me in right direction. Thanks and Regards SG
