Successive Interference Cancellation for Bandlimited Channels With Direct Detection

The maximum information rates for bandlimited channels with direct detection are achieved with joint detection and decoding (JDD), but JDD is often too complex to implement. Two receiver structures are studied to reduce complexity: separate detection and decoding (SDD) and successive interference ca...

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Bibliographic Details
Published in:IEEE transactions on communications 2024-03, Vol.72 (3), p.1330-1340
Main Authors: Prinz, Tobias, Plabst, Daniel, Wiegart, Thomas, Calabro, Stefano, Hanik, Norbert, Kramer, Gerhard
Format: Article
Language:English
Subjects:
Algorithms
Capacity
Channels
Complexity
Decoding
Detectors
direct detection
Fiber optics
Gibbs sampling
information rate
Information rates
Interference
Interference cancellation
Modulation
Optical fiber dispersion
Signal to noise ratio
successive interference cancellation
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Summary:The maximum information rates for bandlimited channels with direct detection are achieved with joint detection and decoding (JDD), but JDD is often too complex to implement. Two receiver structures are studied to reduce complexity: separate detection and decoding (SDD) and successive interference cancellation (SIC). For bipolar modulation, frequency-domain raised-cosine pulse shaping, and fiber-optic channels with chromatic dispersion, SIC achieves rates close to those of JDD, thereby attaining significant energy gains over SDD and intensity modulation. Gibbs sampling further reduces the detector complexity and achieves rates close to those of the forward-backward algorithm at low to intermediate signal-to-noise ratio (SNR) but stalls at high SNR. Simulations with polar codes, higher-order modulation, and multi-level coding confirm the predicted gains.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2023.3337254