Capacity Region of Asynchronous Multiple Access Channels with FTN

TL;DR

This paper characterizes the capacity region of asynchronous multiple access channels with FTN signaling, demonstrating that asynchronous transmission and FTN significantly enhance achievable data rates, with the capacity region expressed in both frequency and time domains.

Contribution

It introduces a novel analysis showing the equivalence of capacity regions in frequency and time domains for asynchronous MAC with FTN, highlighting the benefits of these techniques.

Findings

Asynchronous transmission and FTN provide significant capacity gains.

Capacity region expressed in frequency domain and matched in time domain.

Achievable rate region proven to be optimal in the studied scenario.

Abstract

This paper studies the capacity region of asynchronous multiple access channel (MAC) with faster-thanNyquist (FTN) signaling. We first express the capacity region in the frequency domain. Next, we calculate an achievable rate region in time domain and prove that it is identical to the capacity region calculated in the frequency domain. Our analysis confirms that asynchronous transmission and FTN bring in significant gains.