Title :
Validation of Replay-Based Underwater Acoustic Communication Channel Simulation
Author :
Otnes, Roald ; van Walree, Paul A. ; Jenserud, Trond
Author_Institution :
Maritime Syst. Div., Norwegian Defence Res. Establ. (FFI), Horten, Norway
Abstract :
This paper discusses validation methods for underwater acoustic communication channel simulators, and validates direct and stochastic replay of underwater acoustic communication channels as implemented in a channel simulator called Mime. Direct replay filters an input signal directly with a measured time-varying impulse response, whereas stochastic replay filters an input signal with a synthetic impulse response consistent with the scattering function of the measured channel. The validation uses data from two sea experiments and a diverse selection of communication schemes. Good agreement is found between bit error rates and packet error rates of in situ transmissions and simulated transmissions. Long-term error statistics of in situ signaling are also reproduced in simulation when a single channel measurement is used to configure the simulator. In all except one comparison, the packet error rate in simulation is within 20% of the packet error rate measured on location. The implication is that this type of channel simulator can be employed to test new modulation schemes in a realistic fashion without going to sea, except for the initial data collection.
Keywords :
error statistics; filtering theory; modulation; time-varying channels; transient response; underwater acoustic communication; BER; Mime; bit error rates; direct replay filters; in situ signaling; in situ transmissions; long-term error statistics; modulation schemes; packet error rates; scattering function; simulated transmissions; single channel measurement; stochastic replay filters; synthetic impulse response; time-varying impulse response; underwater acoustic communication channel simulation; validation methods; Channel models; Computer simulation; Multipath channels; Time-varying channels; Underwater acoustics; Underwater communication; Channel models; computer simulation; multipath channels; time-varying channels; underwater acoustics; underwater communication;
Journal_Title :
Oceanic Engineering, IEEE Journal of
DOI :
10.1109/JOE.2013.2262743