Think about this. The signal transmitted at USRP TX is [image: image.png] Then after transmission, received at USRP RX is [image: image.png]
Here, ignore the Doppler shift, and just consider the phase change due to the transmission distance, I know due to the wavelength, the phase received might be mod 2*pi, however, how can we get the received below in USRP? [image: image.png] Should we use analog signals to get the phase offset? or After ADC? Thx On Wed, Oct 7, 2020 at 5:21 PM Marcus D. Leech <patchvonbr...@gmail.com> wrote: > On 10/07/2020 07:13 PM, Xiang Ma wrote: > > Should the TX be the signal before it been received and after it been > > transmitted? > > > > Thx > > > > > The phase of the TX signal, as seen at the RX will be some function of > the propagation delay between the two, and the initial phase at the TX. > That's basic conceptual stuff. > > Since the TX and RX phase is determined by hardware that isn't > necessarily mutually synchronized, (that is the RX LO and TX LO don't > originate from the same hardware), determining the initial phase will > require estimating what the phase difference due to > geometry between the TX and RX is. In radar applications, I > understand that coding is used to help with this. But I'm not a radar guy. > > But again this is basic conceptual stuff that is, to a first > approximation, unrelated to the hardware that is being used. > > > > > > -- *Xiang Ma, *Ph.D. Student College of Engineering Utah State University E-mail:marxwo...@gmail.com <congsha...@gmail.com>
