Decoded Symbols (5G NR/5G-Advanced)

There are two types of traces in the Trace > Data > Demod and MIMO Multiple Input, Multiple Output: A physical layer (PHY) configuration in which both transmitter and receiver use multiple antennas. menus that display component carrier data: CCn (component carrier is fixed), and Selected Display CC (component carrier is dynamically selected using the Display parameter). See About Per-Carrier Trace Types for more information.

The Decoded Symbols trace shows the decoded symbol data for all active channels. The Decoded Symbol Trace always contains the bits from all the active channels, no matter what kind of decoding is selected for each channel.

For example, if PBCH Decode is OFF, still there are PBCH bits displayed in Decoded Symbol Trace, and they are demodulated bits (if PBCH Decode is TB Decode, the bits are payload + CRC Cyclic Redundancy Check).

It is the same for all the other active channels. The color of the decoded symbols indicates the different channel types and users. For each channel type, a white bit indicates this is the first bit of a new decoding unit. For PBCH, the decoding unit is each SS/PBCH block; for each PDSCH Physical Downlink Shared Channel/PDCCH/PUSCH/PUCCH, the decoding unit is per slot.

The Decoded Symbols trace includes both payload bits and CRC bits when Decoded TB is selected.

Decoding for PUCCH format 0 is not supported.

For PUCCH formats 1, 2, 3 and 4, when the UCI bit size (PUCCH bit number) is less than 12 bits, there is no CRC result, and the decoded bits are displayed in the Decoded Symbols trace.

The bits in this symbol table can be located outside the current range of bits shown. To view bits for a particular subframe:

Place a marker on the symbol table. Right-click on the symbol table and click the marker visibility checkbox to display Marker 1.
Position the marker in the table and scroll to move the marker position to the desired location in the table.

Alternatively, you can double-click the byte number in the marker readout window to open a dialog and edit the byte position of the marker.