Abstract
An assessment of multipath spread, coherence time, and source motion induced dilation on orthogonal frequency division multiplexed communications is made. Multipath delay spread of over 0.5 s and frequency selectivity of less than 20 Hz were observed off the Nova Scotia coast. Source motion on an 18-kHz center frequency 4-kHz bandwidth signal induce Doppler wander as large as 2 Hz/s. Implications on communications via tightly spaced orthogonal tones is addressed and bit error rates are reported.
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