Abstract
Experimental studies of fading RF communication chan nels are usually very difficult to perform under actual operating conditions. This paper describes a fading chan nel simulator which is easily constructed and flexible in operation. Using this simulator, modulation and coding techniques suitable for use in communication and ranging equipment can be tested and optimized for operation dur ing periods of severe fading. The simulator uses ultrasonic acoustical waves transmitted through water to achieve favorable changes in the space and time scales; typical fading rates are from 2 to 30 fades per second.
The paper also describes simple hybrid statistical mea surement equipment used in studying the probability dis tributions and correlation functions of the received signals.
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