Thank you Marcus! So the N310 would be the way to go? I was unsure since the TwinRX is recommended for phase coherent applications.
Marcus D. Leech via USRP-users <usrp-users@lists.ettus.com> schrieb am So., 26. Jan. 2020, 18:57: > On 01/25/2020 11:43 AM, Sammy Welschen via USRP-users wrote: > > Dear all, > > > > I am planning a system with 5-10 channels that is capable of DOA > > estimation. > > > > Concerning the calibration of the resulting array, would there be a > > difference between a system made up of N310 and one made up of X310 > > with TwinRX boards? Would there be other important differences that > > influence estimation performance? > > > > As I understand it, the TwinRX allows LO sharing between the boards in > > a single X310, but this would not help me if I have two or three X310. > > On the other hand, the N310s could be connected to a shared LO. > > > > Are the following thoughts correct? > > > > Suppose I turn on my system. Then I have to calibrate phase offsets > > between channels in any case. Now I change the center frequency. If I > > have N310s without shared LO, I have to recalibrate. Same for the > > X310s, since LOs are shared only internally. If I have N310s with a > > shared LO, I do not have to recalibrate. > > > > If I restart the system, I have to recalibrate in any case. > > > > The devices would by synchronized with PPS in any case and with the 10 > > MHz reference if no external LO is used. > > > > What is the better choice for DOA estimation (N310 or X310 with TwinRX > > or something different)? > > > > Thank you very much > > > > Sammy > > > > > Sammy: > > Your characterization of the two scenarios is correct. > > There may be some folks on this list who have implemented DOA schemes, > but likely few-to-none who have done it on both X310 and N310 > and can comment on the differences they encountered. > > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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