Preamble Freq Error (802.16 OFDM)
(Preamble Frequency Error) is the difference between the measured center frequency of the transmitted signal and the VSA’s center frequency. The trace shows the total frequency error during the preamble portion of the OFDM Orthogonal Frequency Division Multiplexing: OFDM employs multiple overlapping radio frequency carriers, each operating at a carefully chosen frequency that is Orthogonal to the others, to produce a transmission scheme that supports higher bit rates due to parallel channel operation. OFDM is an alternative tranmission scheme to DSSS and FHSS. burst. This includes the constant frequency error as displayed in the Syms/Errs trace in addition to any time-varying frequency error.
is sampled at 256 times the subcarrier spacing.
See Also
