docsIf31CmDsOfdmChanRollOffPeriod

Roll off period maximizes channel capacity by sharpening the
edges of the spectrum of the OFDM signal. For windowing
purposes another segment at the start of the IDFT output is
appended to the end of the IDFT output - the roll-off postfix
(RP). There are five possible values for the (RP), and the
choice depends on the bandwidth of the channel and the number
of exclusion bands within the channel. A larger RP provides
sharper edges in the spectrum of the OFDM signal; however,
there is a time vs. frequency trade-off. Larger RP values
reduce the efficiency of transmission in the time domain,
but because the spectral edges are sharper, more useful
subcarriers appear in the frequency domain. There is an
optimum value for the RP that maximizes capacity for a given
bandwidth and/or exclusion band scenario.

MIB

DOCS-IF31-MIB

OID

.1.3.6.1.4.1.4491.2.1.28.1.9.1.9

Type

column

Access

readonly

Status

current

Units

number of samples

Parent

docsIf31CmDsOfdmChanEntry