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Time-reversed orthogonal frequency division multiplexing (TR-OFDM) has recently received attention as a promising scheme for supporting single-input multiple-output (SIMO) communications over time-dispersive fading channels. In TR-OFDM, the time reversal processing cleverly converts multiple time-dispersive fading channels associated with SIMO-OFDM into a single channel with generally smaller time...
Error control coding (ECC) is essential for correcting soft errors in Flash memories. In such memories, as the number of erase/program cycles increases over time, the number of errors increases. In this paper we propose a flexible product code based ECC scheme that can support ECC of higher strength when needed. Specifically, we propose product codes which use Reed-Solomon (RS) codes along rows and...
This paper proposes a frequency-domain detection scheme for single-carrier multiple-input, multiple-output (MIMO) underwater acoustic (UWA) communication using low-density parity-check (LDPC) codes. The new scheme employs turbo equalization technology together with iterative decoding technique, leading to a double-layer turbo detection structure. In the outer-layer turbo equalization, a soft-decision...
Multiple-input/multiple-output (MIMO) communications can significantly increase the data rate using transmitter/receiver diversity in theory. However, experimental demonstrations of the increase of data rate in MIMO underwater acoustic communications so far were limited to a (small) fraction of what is theoretically possible, beyond that the bit error rate (BER) becomes unacceptably high due to severe...
We present the effects of correlated or/and non-identical fading channels as well as outdated/imperfect channel estimations on the performance of newly proposed finger reassignment and replacement schemes for RAKE receivers in the soft handover region. The performance of these schemes were previously analyzed by the authors over independent and identically distributed Rayleigh fading channels. In...
This paper experimentally investigates the plausibility of a phase masking scheme for SPECTS O-CDMA security enhancement. Implementation of the phase mask is demonstrated with experimental results showing the improvement in security.
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