Common Pilot Error (802.16 OFDMA)
CPE in the summary data.
trace data shows the difference between the measured and ideal pilot subcarrier symbols. The CPE error summary data provides the RMS level of the trace data as a percentage of the ideal signal. SeeResidual phase and frequency settling that occurs following the preamble is measured via the
trace data. When is selected, this trace data shows the average phase error of the active OFDMA pilots as a function of time (versus data symbol number). To convert to frequency units, select Trace Format equal Group Delay.At each symbol-time in the burst, the measured symbol values of the active pilot subcarriers are compared with the ideal values. The differences are averaged together, producing a single complex value for each symbol-time. Normally the phase of this trace is displayed, showing how the pilot phase changes over the burst. When
is enabled, the magnitude of this trace will help see signal magnitude changes over the burst.See Also
Available Trace Data (802.16 OFDMA)