Successive Interference Cancellation for Bandlimited Channels with Direct Detection

Tobias Prinz, Daniel Plabst, Thomas Wiegart, Stefano Calabrò, Norbert Hanik, Gerhard Kramer

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)1330-1340
Number of pages11
JournalIEEE Transactions on Communications
Volume72
Issue number3
DOIs
StatePublished - 1 Mar 2024

Keywords

  • Capacity
  • Gibbs sampling
  • direct detection
  • information rate
  • successive interference cancellation

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