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The Advanced Research Projects Agency (AEWA) has embarked on a comprehensive effort to advance the state-of-the-art in meteor burst (MB) communications. The principal ARPA MB link performance objective is the demonstration of daily-average MB link throughputs in excess of 1 kbps for unconstrained point-?o-point communications, versus 1OObps for conventional installations. This order-of-magnitude increased throughput permits the use of advanced digitized voice processors developed by the Naval Research Laboratory. In addition, ARPA seeks to enhance link performance between an unconstrained base station and a "disadvantaged" terminal.The core technologies integrated in this effort include adaptive antenna arrays, advanced MI3 modems, and digitized voice processors. This paper describes the ongoing High-ERP Meteor Burst Link Experiment (HEMBLE), presents link performance predictions, and suggests several applications for advanced MB communications.

The concept of multiband, multimode radios is relevant to a wide variety of communications applications. These applications include the commercial wireless and Civil Government sectors, and the military communications sector. The Modular Multzjimction Information Transfer System (MkUTS) Forum is in the process of developing standards requirements and standards recommendations for multiband, multimode systems that meet wireless communications user requirements from all three of these sectors. In March 1995, Under Secretary of Defense for Acquisition and Technology, the Honorable Paul G. Kaminsh, addressed the Research and Development Subcommittee of the House Committee on National Security and stated: "The bottom line is that we have no choice but to move from separate industrial sectors for defense and commercial markets to an integrated national industrial base. Leveragmg commercial technological advances to create military advantage is critical to ensuring that our equipment remains the most advanced in the world. The objective is to marry the momentum of the vigorous, productive, and competitive commercial industrial infrastructure with the unique technologies and systems integration capabilities provided by our defense contractors. Thus, the goals and objectives of the U T S Forum are very much consistent with the theme of this conference for "Integrating Military and Commercial Communications for the Next Century. "

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