Result Length (NB-IoT)
20 slots or the length of the signal, whichever is larger
determines how many slots will be available for demodulation. Measurement Interval and Measurement Offset specify which part of the time capture is demodulated. Result Length, Measurement Interval, and Measurement Offset are always specified in slots with the length that matches the detected subcarrier spacing (15 kHz kiloHertz: A radio frequency measurement (one kilohertz = one thousand cycles per second). Þ 0.5 ms, 3.75 kHz Þ 2 ms).
For Uplink, if is selected, the Result Length field will be grayed out and the NB-IoT demodulator will automatically determine the result length. For NPUSCH, this is based on RU Number, Repetitions, and Start Subframe. For NPRACH, this is based on Repetitions. Note that for NPRACH, Auto-calculate is only approximate. Triggering is recommended for finding the beginning of the NPRACH burst.
For uplink, the Result Length parameter is specified in slots of length = 2 ms, unless NPUSCH Format Parameters Auto is disabled and Subcarrier Spacing = 15 kHz. Then, a slot is defined as 0.5 ms long.
The result data starts where the analysis boundary is found and ends after the amount of data specified by Result Length.
The length of the time capture (contained in Search Time) is longer than the result length to allow for location of the analysis boundary within the time capture.
See Also
