Hi, I only have some tips that you might want to try.
- set the lo_offset to 11M - use the LMS equaliser (the other one is total non-sense :-) - change the gain - use the 5GHz band or assert that it’s really purge-G (non-compatible mode) The last one is important. In the 5GHz-band you usually have 11a, which is perfectly fine. In the 2.4GHz band 11g is often in a mode that is backwards compatible with 11b. This mode uses a different preamble that is currently not supported. Some APs (or a MacBook) can be configured to use 11g-only mode. These frames should work. Best, Bastian > On 09 Dec 2015, at 17:50, Ke Xu <kexukez...@gmail.com> wrote: > > Hi everyone! > I am a beginner of GNU Radio and i'm studying 802.11 recently.I found > a very nice work in https://github.com/bastibl/gr-ieee802-11/tree/master and > it does me a great favor. I connected two USRP B210,one run wifi_tx.grc, the > other run wifi_rx.grc, it worked and i can see the decoded "hello world" in > my terminal.But when i use the wifi_rx.grc to receive existing WIFI > signal(such as wifi in home) to get the AP' SSID,it failed,i got nothing but > disorder code(i enabled the debug in OFDM Decode MAC block).It seems that > the flow breaks in the checking checksum step because the checksum is not > equal to 558161692,the OFDM Parse MAC block has never been excuted. > What shall i do? Chould the wifi_rx.grc receive existing WIFI signal > correctly? I notice that the receiver is limited to BPSK and QOSK, does this > caused the problem? I'm not familiar with CRC, can anyone explain why the > checksum is a constant? > Thanks in advance! Any advice will be welcome! > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
