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Performance Evaluation of Data Modems for the Aeronautical Satellite Channel

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2 Author(s)
Salwen, H. ; Proteon Associates, Inc., Waltham, MA, USA ; Duncombe, C.

Several modems and satellite subsystems were tested with the aid of an aeronautical channel simulation facility. The modems tested include a high-performance differential phase-shift keyed (DPSK) modem, a high-performance coherent phase-shift keyed (CPSK) modem, two hybrid voice-data modems, and a lower performance CPSK modem. Data performance results are presented in the form of probability of bit error versus signal-to-noise density and signal-to-multipath ratios with Doppler spread as a parameter. Some tests were conducted with a hard limiting IF processor in cascade with the channel simulator to simulate satellite characteristics. The characteristics of the aeronautical-satellite channel simulator are also described. The discussion concludes with a general evaluation of the effect of aeronautical-satellite channel characteristics on modem performance, as derived from the simulation experiments.

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Communications, IEEE Transactions on  (Volume:23 ,  Issue: 7 )