[Discuss-gnuradio] question on 802.15.4 implementation

Hi , I am trying to send a simple message between two USRPs using the new message passing interface in GNU Radio 3.7 over 802.15.4 implementation. I created a "message generator" which publishes a message to the "app in" port of 802.15.4. Similarly on the receiver side a "message consumer" ge

Re: [Discuss-gnuradio] question on 802.15.4 implementation

ed Network Technologies Division 100 Bureau Drive, Stop 8920 Gaithersburg, MD  20899-8920 -Original Message- From: Bastian Bloessl [mailto:bloe...@ccs-labs.org] Sent: Thursday, May 29, 2014 5:58 AM To: Sahoo, Anirudha Cc: Discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] question o

[Discuss-gnuradio] gr-atsc related question

Hi, I am new to gnu radio/usrp. I am trying out digitial TV application gr-atsc. I have a USRP N210 with a basic omnidirectional antenna. I checked local digital TV stations and found (from Internet) that there is one at 603.25 MHz (UHF channel 36) and the station is listed to be about 14 miles

Re: [Discuss-gnuradio] gr-atsc related question

Thanks Tom for the prompt and helpful reply. I am using SBX 400-4400 MHz Rx/Tx daughterboard. From: trond...@trondeau.com [trond...@trondeau.com] On Behalf Of Tom Rondeau [t...@trondeau.com] Sent: Saturday, September 15, 2012 10:46 AM To: Sahoo, Anirudha

[Discuss-gnuradio] not able to play fm receiver application

Hi, I have a USRP N210 with basicRX daughterboard. I ran uhd_wbfm_receive.grc application. But I cannot tune to any FM radio station. I get warning like -- UHD Warning: The hardware does not support the requested RX frequency: Target frequency: 88.50 MHz Actua

Re: [Discuss-gnuradio] not able to play fm receiver application

- From: discuss-gnuradio-bounces+anirudha.sahoo=nist@gnu.org [mailto:discuss-gnuradio-bounces+anirudha.sahoo=nist@gnu.org] On Behalf Of Sahoo, Anirudha Sent: Friday, September 21, 2012 5:22 PM To: discuss-gnuradio@gnu.org Subject: [Discuss-gnuradio] not able to play fm receiver application Hi

[Discuss-gnuradio] obtaining duration of Idle and busy cycles

Hi, I am trying to use "usrp_sprectrum_sense.py" to obtain Idle (white space) and busy cycles of a channel (say channel 1 of WiFi). I was thinking of doing it the following way: Continuously get the FFT (and hence power in db) of center frequency of channel 1. Whenever the power is very low (be

[Discuss-gnuradio] changing carrier map in ofdm

Hi, I have modified "benchmark_ofdm_rx.py" (and tx) so that the transmitter and receiver can change the subcarrier map (based on some event, e.g., sensing outcome) and send packet with the new carrier map. I have a simple handshake protocol through which the sender and receiver synchronize the

[Discuss-gnuradio] TIMEOUT from "digital_ofdm_sampler.cc"

Hi, I am trying to implement an algorithm over the ofdm implementation (modifying benchmark_xx.py) so that the txmitter and rcvr can communicate changing the subcarriers dynamically. The scheme is roughly as follows: (1) Inially the txmitter and the rcvr listen on a well-known set of su

[Discuss-gnuradio] problem with benchmark_tx.py with "--discontinuous"

Hi, When I run benchmark_tx.py with "-discontinuous" flag ON, I notice the following problem: When the transmitter goes to sleep (for 1 sec), the receiver TIMEOUT (which is fine). But then when the txmitter wakes up and sends the next 5 packets, the receiver consistently does not receive th

[Discuss-gnuradio] is this normal behavior of benchmark_rx.py

Hi, I have two USRPs (N210) connected to each other through a channel emulator (via RF cable) which is emulating a lossless channel. When I run the benchmark_rx.py I see some spurious bytes being received by the receiver even when the sender application (benchmark_tx.py) has not been started. I hav

Re: [Discuss-gnuradio] Very low packet loss rate for the discontinuous BPSK communications- the analysis and looking for solution

I think it is the same problem I see in gr-digital/ofdm/benchmark_tx and rx. In discontinuous mode (with bpsk modulation), the first packet of every burst is always missing at the receiver. Will appreciate more details on how to fix the problem so that burst mode works fine. Should the fix be ma

Re: [Discuss-gnuradio] terminating benckmark_rx.py after TIMEOUT

If you are running ofdm benchmark_rx, then the TIMEOUT comes from digital_ofdm_sampler.cc. I think the timeout occurs, if the sampler does not get another preamble even after 1000 (this is the value set currently) symbols, then it declares TIMEOUT and enters STATE_PREAMBLE. thanks and regards --A

[Discuss-gnuradio] transmitter receiving its own packet

Hi, I have two USRP N210s. The sender's "Tx/Rx" port is connected to the receiver's "Rx2" port and vice-versa (via RF-cable). I have a python app running on the sender and receiver which sends a REQ packet to the receiver. I see that the sender receives its own packet. In this app, the receiver

[Discuss-gnuradio] Foreign Guest Researcher position

Foreign Guest Researcher Appointment in Cognitive Radio Research with Software Defined Radios National Institute of Standards and Technology, U.S. Department of Commerce The Emerging and Mobile Network Technologies Group in the Information Technology Laboratory of the U.S. Department of Co