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This paper proposes a new iterative receiver for single-carrier multiple-input–multiple-output (SC-MIMO) underwater acoustic (UWA) communications, which utilizes frequency-domain turbo equalization (FDTE) and iterative channel estimation. Soft-decision symbols are not only fed back to the equalizer to cancel the intersymbol interference (ISI) and cochannel interference (CCI), but also used as training...
When adopting transmit diversity in Time Domain Synchronous Orthogonal Frequency Division Multiplex (TDS-OFDM) system, the pseudo noise (PN) sequence from different transmit antennas will interfere with each other, so the receiver can't estimate the channel impulse response (CIR) correctly. In this paper, two frame structures with different PN sequence designs for transmit diversity are proposed....
Accurate channel estimation is essential for coherent single-carrier (SC) block transmission systems. In this paper, we propose novel iterative algorithms for estimating the channel impulse response (CIR) in SC block transmission systems by exploiting a unique word (UW) extension. The interference caused by the data to the UW is removed from the received signal by first equalizing the data using a...
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