Simulation and analysis of a MFQPSK signal transmitted through an acoustic medium
Daniel, Anita S.
Moose, Paul H.
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A multi-frequency quadrature phase shift keyed (MFQPSK) signal has been developed at NPS to be used in computer communications. This report discussed the simulation of a MFQPSK signal transmitted from a moving transmitter platform through a near vertical acoustic channel as seen by a moored receiver. The simulated received signal is tested against MFQPSK signal theory. The simulation was developed to be an experimental tool for testing various Doppler, synchronization, and coding algorithms/techniques for a MFQPSK communication signal. The degradation of output signal-to-noise ratio due to Doppler shifts caused by the moving transmitter is analyzed. An algorithm for estimating Doppler compression/expansion in the received signal is evaluated.
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