youlizhao / ofdm Goto Github PK
View Code? Open in Web Editor NEWOFDM programs for USRP UHD version
OFDM programs for USRP UHD version
Bug Description: If I send two packets using while, I can receive multiple packets (much more than 2 packets). It seems that it is a stream.
I guess something is wrong with the repetition parameter. I should fix this bug last time :-(
Des.: (1) If we use higher decimation/intepolation value (lower bandwith, e.g., decim: 100 -> 500), we can not find peak any more using STS or LTS (FTW project file); (2) Sometimes, higher bandwidth does not mean the existing of peak. Weird; (3) If we use sleep mechanism to send periodic packets, sometimes not all packets are sent periodic, e.g., we only get 4 packets with equal IPI. Maybe others are lost in queue or struck? (see gr_msg_queue.cc Line 54: while(full_p())) d_not_full.wait(guard)).
Guess: It is caused by CFO. Need validation.
Plan: Sync two usrps, and send the same file with same bandwidth to see whether peaks exist.
Task: Sync two USRP programs;
Phenomenon: if I use benchmark_txrx.py to setup Tx/Rx, no problem. However, if I first run benchmark_rx.py, then benchmark_tx.py, the program will tell me that no usrp is found. It is weired, since benchmark_txrx.py still uses two paths, one sink and one source at the same time. Why?
For commit 69d84b6, "import raw" has error: undefined symbol: _Z13digital_crc32PKhm.
When I install ftw_80211_ofdm_tx files, the modules are always installed in pythonX*Y/site-packages. To avoid adding new PYTHONPATH, I want to install them into dist-packages. The reason why I want to do that is because when I write from gnuradio import ftw. The program is not so smart to recogize it should use dist-packages/ or site-packages. In other words, the system only recognize one folder.
To tackle this problem, I change site-packages to dist-packages in ftw_80211_ofdm_tx installation files, e.g., configure. I can use find . | xargs grep "site-packages" to find all files. However, it does not work. After configuration, site-packages appear again. It is weired.
Any hints?
(1) Why can we find two preambles using benchmark_tx.py + benchmark_rx.py?
(2) How to understand sig[0]?
(3) Sleeping in Tx leads to lower PRR in Rx, Why?
A declarative, efficient, and flexible JavaScript library for building user interfaces.
๐ Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
The Web framework for perfectionists with deadlines.
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. ๐๐๐
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
We are working to build community through open source technology. NB: members must have two-factor auth.
Open source projects and samples from Microsoft.
Google โค๏ธ Open Source for everyone.
Alibaba Open Source for everyone
Data-Driven Documents codes.
China tencent open source team.