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Deep learning has been applied in physical-layer communications systems in recent years and has demonstrated fascinating results that were comparable or even better than human expert systems. In this paper, a novel convolutional neural networks (CNNs)-based autoencoder communication system is proposed, which can work intelligently with arbitrary block length, can support different throughput and can operate under AWGN and Rayleigh fading channels as well as deviations from AWGN environments. The proposed generalized communication system is comprised of carefully designed convolutional neural layers and, hence, inherits CNN's breakthrough characteristics, such as generalization, feature learning, classification, and fast training convergence. On the other hand, the end-to-end architecture jointly performs the tasks of encoding/decoding and modulation/demodulation. Finally, we provide the numerous simulation results of the learned system in order to illustrate its generalization capability under various system conditions.INDEX TERMS Convolutional neural network, end-to-end learning, autoencoder, communication systems.

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Abstract-In this treatise, we propose a novel serial concatenated RSC-coded Irregular Precoded Linear Dispersion Codes (IR-PLDC), which is capable of operating near MIMO channel's capacity. The irregular structure combined with the employment of an Infinite Impulse Response (IIR) precoder facilities the proposed system's operation across a wide range of SNRs, while maintaining an infinitesimally low BER. Each coding block of the IR-PLDC scheme is designed with nearcapacity operation in mind with the aid of Extrinsic Information Transfer (EXIT) charts. The proposed RSC-coded IR-PLDC scheme is capable of operating as close as 2.5dB to the MIMO channel's capacity, namely at SNRs as low as ρ = −7dB.