docsPnmCmOfdmChanEstCoefTable

The purpose of this table is for the CM to report its estimate of the
downstream channel response. The reciprocals of the channel response
coefficients are typically used by the CM as its frequency-domain
downstream equalizer coefficients. The channel estimate consists of a
single complex valued coefficient per subcarrier. The channel response
coefficients are expressed as 16 bit two's complement numbers using s2.13
format. The CM samples are scaled such that the average power of the
samples is approximately 1, in order to avoid excessive clipping and
quantization noise.
Summary metrics (tilt, ripple, and group delay) are defined in order to
avoid having to send all coefficients on every query. The summary metrics
are calculated when the corresponding MIB is queried. A Coefficient
filename and trigger are provided to obtain the channel coefficients.
This table will have a row for each ifIndex for the modem.

MIB

DOCS-PNM-MIB

OID

.1.3.6.1.4.1.4491.2.1.27.1.2.3

Type

table

Status

current

Parent

docsPnmCmObjects

Children

1