DataRCE (802.16 OFDMA)

DataRCE (dB) is the same as EVM, but excludes the pilot subcarriers. DataRCEis computed in dB and as a percentage (%rms). DataRCE is necessary since measuring data bursts with few allocated subchannels leads to an EVM dominated by pilot subcarrier EVM. DataRCE does not include "common" pilots that are not specifically associated with the data burst. This value is computed using all active data subcarriers.

When making measurements of DL-PUSC data bursts that occupy fewer slots than allocated, the allocated-but-unoccupied slots will be used when computing error metrics (like DataRCE). Therefore, if many slot are unoccupied, but allocated, these metrics may include significant error power which is not present on data carrying subcarriers. This occurs automatically when an analyzed DL-PUSC data burst is detected as having allocated-but-unoccupied slots (relative to the decoded DL-MAP or the user-provided zone definition).

Individual Data Burst - DataRCE results

The DataRCE results for individual data bursts are provided in the Data Burst Info summary table. The DataRCE (dB) and RCE (dB) results will be identical for zone types where the pilot subcarriers are not associated with specific subchannels (i.e. DL-PUSC, DL-FUSC, DL-OFUSC). In all other zone types, where the data burst-are associated with specific subchannels (i.e. all Uplink zone types and DL-AMC) associated pilot subcarriers, the RCE and DataRCE results are unique. The RCE (dB) result will include pilot subcarriers that are not included in the DataRCE (dB), see Data Burst Info summary table.