I am using LFTX and LFRX to transmit and receive data between two nodes.
I am modulating a bit stream with on-off keying (OOK) in which bit 1 is
modulated into HIGH voltage and bit 0 is modulated into LOW voltage
What I concern is, USRP can process bipolar signal, has a low noise
amplifier (LNA) and an ADC at the receiving end. I’ve heard that LNA and
ADC take a heavy stress if they process a unipolar, a DC biased signal.I
want the statement to be clear. I have a particular condition that I
make a transmitted signal a bipolar NRZ signal instead of OOK…
PS. I make a thread in discuss-gnuradio since I’ve got no reply on
USRP-users several days or weeks ago (I don’t remember exactly…).