On the Implementation Advantages of an Open Modular Modem Architecture

As the warfighter moves into the transformational world of communications beyond the line-of-sight (BLOS) of the near future, a key component of the architecture revolves around the core modem and its adaptability to various operational needs. This paper explores these needs and the requirements necessary to fulfill the communication alternatives and how they apply to various applications. Among these requirements the need for a modular, scaleable and adaptable modem working with a suitable backplane interface to external networks becomes paramount for continued information flow under dynamic conditions. The paper details various configurations such as mobile, manpack, fixed and airborne. The architecture describes a scaleable platform ranging in terms of computational elements from single to multiple signal processors and suitable memory storage. Additionally, the paper addresses the need for a common internal modem communication interface, such as the Open Core Protocol (OCP), enabling expandability and the incorporation of modules required for the particular implementation. The paper also includes a backplane interface amenable to various system incorporations without hardware changes and requiring a minimal software application interface. We explore backplanes such as those described by the Advanced Telecommunications Computing Architecture (ATCA) or VMEbus International Trade Association (VITA) references that enable versatile deployments with external equipment and systems. The paper concludes with various recommendations and areas for additional study and applications.