6.3 Frequency Error

25.1013GPPRelease 17TSUser Equipment (UE) radio transmission and reception (FDD)

The UE modulated carrier frequency shall be accurate to within ±0.1 PPM observed over a period of one timeslot compared to the carrier frequency received from the Node B. For the PRACH preambles the measurement interval is lengthened to 3904 chips (being the 4096 chip nominal preamble period less a 25 μs transient period allowance at each end of the burst). These signals will have an apparent error due to Node B frequency error and Doppler shift. The signals from the Node B must be averaged over sufficient time that errors due to noise or interference are within the above ±0.1PPM figure. The UE shall use the same frequency source for both RF frequency generation and the chip clock.