In a DOCSIS 3.1 orthogonal frequency division multiple access (OFDMA) upstream channel, the average power of the subcarriers are normalized to what bandwidth?

In DOCSIS 3.1, the average power of the subcarriers in an OFDMA upstream channel is normalized to a bandwidth of 1.6 MHz. This normalization allows for consistent calculations and comparisons of power levels across different transmission scenarios and configurations within the cable network.

Understanding the significance of this normalization helps in designing and optimizing the transmission parameters required for efficient communication. By normalizing to 1.6 MHz, operators can manage the spectrum usage more effectively, ensuring that every subcarrier operates within its designated limits while maximizing the overall system performance. This aspect is particularly important in OFDMA channels where multiple users may share the same spectrum efficiently.

The other options represent bandwidths that do not align with the standardized practices established for DOCSIS 3.1, leading to inefficiencies and complications in the management of the network. Normalization at the correct bandwidth is key to ensuring reliable performance in advanced cable modem technologies.