Soft reminder!
Thanks, From: Prasad [mailto:[email protected]] Sent: Monday, July 20, 2020 7:58 PM To: '[email protected]' Cc: 'Rao Yenamandra' Subject: 1 Ts delay in USRP B210 Dear Team. Hope you are doing well and safe. We are bringing up our NR-5G UE stack with USRP B210. If time permits, would you pls. reply to below concern with your valuable information. During the synchronization procedure, we observe atleast 1 (Sampling Time) drift in rx streamer in every ~40ms time period. Are we missing any time_spec during uhd_rx_streamer_recv api or in uhd_tx_streamer_send ? Master clock rate: 30.72e6 Sampling rate: 30.72e6 Carrier frequency: 3.8e9 We use one B210 to transmit time domain samples back to back and others to receive. Log snippet: Init PSS detected with lag: 4469 (PSS detection offset from the slot boundary ) sss has been detected Init PSS detected with lag: 4469 sss has been detected Init PSS detected with lag: 4469 sss has been detected Init PSS detected with lag: 4469 sss has been detected Init PSS detected with lag: 4470 à 1 Ts drift sss has been detected Init PSS detected with lag: 4470 sss has been detected Init PSS detected with lag: 4470 sss has been detected Init PSS detected with lag: 4471 à 1 Ts drift. sss has been detected Init PSS detected with lag: 4472à 1 Ts drift sss has been detected Init PSS detected with lag: 4472 sss has been detected Init PSS detected with lag: 4472 sss has been detected Init PSS detected with lag: 4484 à 12 Ts drift sss has been detected Thanks! in advance. Regards, Prasad.
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