Ronald A. Litis

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Sparse channel estimation algorithms are proposed for underwater acoustic Orthogonal Frequency Division Multiplexing (OFDM) communications in time-varying multipath channels. Following carrier frequency offset (CFO) correction, the proposed algorithms first extract the portion of the time domain signal corresponding to pilot symbols. The Matching Pursuit(More)
Single carrier (SC) modulation over a sparse channel motivated by underwater acoustic communications (UAC) is considered. A BER analysis for deterministic channels is first presented that identifies conditions under which SC with zero forcing detection outperforms OFDM. The analysis also motivates the use of MMSE detection in Rayleigh fading channels. An(More)
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