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A Prototype Modem for Hyper-Multipoint Data Gathering SATCOM Systems --- A Group Modem Applicable to Arbitrarily and Dynamically Assigned FDMA Signals ---
Summary: This paper presents a prototype group modem for a hyper-multipoint data gathering satellite communication system. It can handle arbitrarily and dynamically assigned FDMA signals by employing a novel FFT-type block demultiplexer/multiplexer. We clarify its configuration and operational principle. Experiments show that the developed modem offers excellent performance.