hello every !
i use one usrp to transmit complex gr_sin_wave,and use another
two_channel usrp as the receiver.
i thought the mux should be set to “32103210”,but when i did this ,i got
nothing but noisy .then i changed the mux to “33221100”,i got the
ecpected orthogonal sin and cos wave .that confuses me
2010/5/31 weizhongshan [email protected]:
hello every !
i use one usrp to transmit complex gr_sin_wave,and use another two_channel
usrp as the receiver.
i thought the mux should be set to “32103210”,but when i did this ,i got
nothing but noisy .then i changed the mux to “33221100”,i got the ecpected
orthogonal sin and cos wave .that confuses me
What is your daughterboard setup and why are you using 2 channels?
With 2 channels, the default “32103210” value uses all four ADC’s and
the first 2 DDC’s. It sounds like you only want to read one channel
and output separated I and Q components.
Thomas
thanks Thomas!
i didn’t state it clearly .i want to realize a MIMO system ,so I use two
channels .and my daughterboards are RFX2400 MIMO B .
and another problem appears。in the receiver ,since the two channels
receive the same signal simultaneously，i thought the two received
signals from the two channels should be more or less the same(though
they may go through different shading).but through the graph i find the
signal from channel two seems 1/4 λ ahead of that from channel
one
在2010-05-31 23:43:54，"Thomas T." [email protected] 写é“：