Capacity region of quasi-asynchronous discrete multiple-access channel

The capacity region is formulated for a two-user quasi-asynchronous discrete memoryless multiple-access channel in which symbol periods are different i.e., L₁ symbols of the first encoder and L₂ symbols of the second encoder are synchronized. This result is extended to the case that any L₁ symbols of the first encoder and L₂ symbols of the second encoder are not synchronized.