Partial response DFE guided ultra-low complexity FTN signaling for high spectral efficiency intra-DCI
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View abstract on PubMed
Summary
This summary is machine-generated.A new partial-response decision feedback equalizer (PR-DFE) offers ultra-low complexity for Faster-than-Nyquist (FTN) signaling in optical data centers. This method significantly improves receiver sensitivity and reduces symbol error rates for high-efficiency interconnects.
Area Of Science
- Optical Communications
- Signal Processing
- Data Center Interconnects
Background
- Faster-than-Nyquist (FTN) signaling is crucial for high spectral efficiency in next-generation optical data center interconnects (DCIs).
- Traditional trellis-based sequence detectors (MLSE, MAP) for FTN signaling suffer from high complexity, hindering practical implementation.
- Severe inter-symbol interference (ISI) is a major challenge in FTN systems.
Purpose Of The Study
- To propose and experimentally verify a partial-response decision feedback equalizer (PR-DFE) for ultra-low complexity and high-performance FTN signaling.
- To reduce the complexity associated with conventional FTN detection methods.
- To enhance receiver sensitivity and minimize error propagation in FTN systems.
Main Methods
- Development of a PR-DFE scheme combining transmitter-side precoding and receiver-side partial response equalization.
- Experimental validation in a 56Gbaud FTN 4-ary pulse amplitude modulation (PAM4) system with a compression factor of 0.8.
- Comparison of PR-DFE performance against typical DFE and partial-response feed-forward equalizer (PR-FFE) techniques.
Main Results
- PR-DFE achieved 2.4 dB and 1.5 dB receiver sensitivity improvement over typical DFE and PR-FFE, respectively, at a BER of 4.5 × 10<sup>-3</sup>.
- The PR-DFE successfully reduced the probability of two consecutive symbol errors from 4.83 × 10<sup>-3</sup> to 0 compared to the typical DFE.
- Demonstrated ultra-low complexity and high performance suitable for FTN signaling.
Conclusions
- The proposed PR-DFE scheme offers a promising solution for ultra-low complexity and high spectral efficiency in intra-datacenter interconnect (intra-DCI) applications.
- PR-DFE effectively mitigates ISI and reduces error propagation in FTN systems.
- This approach addresses the practical implementation challenges of high-complexity detectors in advanced optical communication systems.
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