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Deep Learning for Communication over Dispersive Nonlinear Channels: Performance and Comparison with Classical Digital Signal Processing

Karanov, Boris; Liga, Gabriele; Aref, Vahid; Lavery, Domanic; Bayvel, Polina; Schmalen, Laurent

In this paper, we apply deep learning for communication over dispersive channels with power detection, as encountered in low-cost optical intensity modulation/direct detection (IM/DD) links. We consider an autoencoder based on the recently proposed sliding window bidirectional recurrent neural network (SBRNN) design to realize the transceiver for optical IM/DD communication. We show that its performance can be improved by introducing a weighted sequence estimation scheme at the receiver. Moreover, we perform bit-to-symbol mapping optimization to reduce the bit-error rate (BER) of the system. Furthermore, we carry out a detailed comparison with classical schemes based on pulse-amplitude modulation and maximum likelihood sequence detection (MLSD). Our investigation shows that for a reference 42\,Gb/s transmission, the SBRNN autoencoder achieves a BER performance comparable to MLSD, when both systems account for the same amount of memory. In contrast to MLSD, the SBRNN performance is achieved without incurring a computational complexity exponentially growing with the processed memory.

Zugehörige Institution(en) am KIT Institut für Nachrichtentechnik - Communications Engineering Lab (CEL)
Publikationstyp Forschungsbericht/Preprint
Publikationsmonat/-jahr 09.2019
Sprache Englisch
Identifikator ISBN: 978-1-72813-151-1
KITopen-ID: 1000105284
Verlag Institute of Electrical and Electronics Engineers (IEEE)
Umfang 9 S.
Nachgewiesen in arXiv
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