Not sure how lively this thread is, but I was wanting something along the lines of the PPS reset of the timestamps discussed above, and did make a small change to the FPGA to do it. On the top level of the FPGA source (lms7_trx_top.bdf) I disconnected lte_clr_smpl_nr from the rx_path_top block. Then added an OR gate. The output of the OR goes to the clr_smpl_nr input of rx_path_top, the inputs of the OR come from lte_clr_smpl_nr and from FPGA_GPIO. So now I can reset the timestamps with a pulse on GPIO0. If you don’t want to use it, you can set that GPIO as an output (low), but if you do want to use it, set that GPIO as an input. Seems to work great.
In trying to get the rbf onto the board though I noticed that function in LimeSuite doesn’t seem to work. LimeUtil does though.
Code-wise, its true you need to look for places where a timestamp is less than a previous timestamp, but that’s actually way easier than the rf switch solution mentioned above (which I did also implement and made work - but what a pain - since gain changes with frequency quite badly in the range I’m using, and then you have to look at the magnitude of every sample to figure out where the pulse starts or stops).
In my application there is no tx happening when the timestamp is reset, though I start transmitting shortly afterwards and things seem to work correctly. I’m not sure how nice things would be if you were in the middle of transmitting when the timestamps suddenly reset.