Time reversal communication in a time-varying sparse channel

Time reversal communication in a time-varying sparse channel.

Recently time reversal (TR) communications has been extended to time-varying channels. The basic idea is to implement it on a block-by-block basis such that within each block the channel remains time-invariant and subsequently is updated using detected symbols (decision-directed mode). Using experimental data (12-20 kHz) collected in shallow water, this letter investigates three different block...

A Perspective for Time-Varying Channel Compensation with Model-Based Adaptive Passive Time-Reversal

Underwater communications mainly rely on acoustic propagation which is strongly affected by frequency-dependent attenuation, shallow water multipath propagation and significant Doppler spread/shift induced by source-receiver-surface motion. Time-reversal based techniques offer a low complexity solution to decrease interferences caused by multipath, but a complete equalization cannot be reached ...

Tracking of Rapidly Time-Varying Sparse Underwater Acoustic Communication Channels

Adaptive Sparse Channel Estimation for Time-Variant MISO Communication Systems

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Time-Varying Frequency Fading Channel Tracking In OFDM-PLNC System, Using Kalman Filter

Physical-layer network coding (PLNC) has the ability to drastically improve the throughput of multi-source wireless communication systems. In this paper, we focus on the problem of channel tracking in a Decode-and-Forward (DF) OFDM PLNC system. We proposed a Kalman Filter-based algorithm for tracking the frequency/time fading channel in this system. Tracking of the channel is performed in the t...