Delay-limited OFDM broadcast capacity region and impact of system parameters

In this work, we calculate the delay-limited capacity (DLC) region of an OFDM (orthogonal frequency division multiplexing) broadcast channel. Furthermore, we analyze the impact of system parameters. The main results are that under weak assumptions, the single user DLC is almost independent of the distribution of the path attenuations in the low SNR region but depends strongly on the delay spread. In the high SNR region the roles are exchanged. Here, the impact of delay spread is negligible and the impact of the distribution is dominant. Finally, we provide a result for the multiuser case.