Thanks. I just wonder why. Because I meet some performance problem. I thought it maybe caused by my misconfiguration of the gr-ieee802-11 code. Now, it seems not.
However, theoretically, as my current sample rate is 10M and BPSK. So the coding rate should be 10M/2 = 5M b/s. The throughtput should be around 5M/8 = 625K B/s. Assuming the 12% head cost, so the data throughput should be 625 * 88 % = 550K B/s. But as my experiment shows, the throughput is only 150K B/s. I'm new to the communication. Is my calculation right ? If it were right, then what might cause the gap? One more question, I didn't run the volk_profile. Does it matter? Best regards. Siyu 2017-06-07 4:23 GMT+08:00 Bastian Bloessl <m...@bastibl.net>: > Hi, > > On 06/06/2017 03:55 PM, zhan siyu wrote: > >> Hi all, >> >> I just found I can't use the iwconfig tap0 rate 20M to setup the >> bandwidth of the tap0. The error message is : >> >> Error for wireless request "Set Bit Rate" (8B20) : >> SET failed on device tap0 ; Operation not supported. >> >> But in their video , it can be set in this way. May I know how to solve >> it ? >> > > The WiFi transceiver is attached to the tun/tap interface, which is a > virtual Ethernet device. This device doesn't support WiFi-specific > configuration through iwconfig. > > If you wanted this level of integration, you would have to write a kernel > module that attaches the transceiver to a virtual WiFi card. > > Some group already did that, but they didn't release the source code. > > Best, > Bastian >
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