[802.3_EPOC] Clarification on spectral characteristics related to Exclusion Sub-band Question
Hi Steve and Folks,
This relates to minimum exclusion sizing and also OFDM channel sizing.
I wanted to raise a clarification point on the ad hoc call yesterday, but couldn't while driving. Leo made an introductory point on the topic, that I wanted to expand on here.
Understanding the "edge RF spectrum" characteristics of an EPoC OFDM sub-channel is necessary to understand RF spacing for both provisioning within cable operator RF spectrum allocations as well as for optionally creating one or more "in OFDM channel notches" to work around other service carriers, pilots, as well as potential well-known (and stable) interferers, etc. Knowing the spectral mask permits following adjacent channel interference requirements for determining the closest "non-null" or "turned on" sub-channel to an allocation edge or for sufficiently "notching" around existing signals (as an example). With these, examples or preferably rules can be created for minimum exclusion sizing as well as for provisioned RF spectrum sizing considerations for an OFDM channel.
At some point, seeing a first draft spectral mask (or equivalent) definition(s) and the adjacent channel interference requirements that impact the EPoC PHY would be helpful. (Realizing that spectral mask characteristics are dependent on sub-channel size, perhaps some generic starter material can be created before OFDM numerology is selected and then fill in the consensus values then.)
Cheers,
Mark
From: Shellhammer, Steve [mailto:sshellha@xxxxxxxxxxxxxxxx]
Sent: Tuesday, November 27, 2012 3:36 PM
To: STDS-802-3-EPOC@xxxxxxxxxxxxxxxxx
Subject: [802.3_EPOC] Exclusion Sub-band Question
EPoC TF,
On today's RF Spectrum Ad Hoc call we discussed the Exclusion Sub-band Rules. There are two approaches that we discussed and it was suggested that it would be good to get feedback from the larger group, including the MSOs, on this topic. Here is a description of the two approaches that have been proposed. If you have technical opinions on the advantages/disadvantages of the two approaches or you have a preference for one method, we would like to hear from you.
<snip>
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