| 1. |
- Börjeson, Erik, 1984, et al.
(författare)
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Benchmarking of Carrier Phase Recovery Circuits for M-QAM Coherent Systems
- 2021
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Ingår i: Optical Fiber Communication Conference, OFC 2021. - 9781943580866 - 9781557528209
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Konferensbidrag (refereegranskat)abstract
- We benchmark blind carrier phase recovery DSP circuits in terms of SNR penalty, power dissipation, latency, area usage, and cycle slip probability, to identify optimal implementations for 16, 64, and 256QAM.
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| 2. |
- Börjeson, Erik, 1984, et al.
(författare)
-
Energy-Efficient Implementation of Carrier Phase Recovery for Higher-Order Modulation Formats
- 2021
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Ingår i: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 39:2, s. 505-510
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Tidskriftsartikel (refereegranskat)abstract
- We introduce circuit implementations of one- and two-stage carrier phase recovery (CPR) for 256QAM coherent optical receivers. We describe in detail the optimizations of algorithms, such as modified Viterbi-Viterbi (mVV), blind phase search (BPS), and principal component-based phase estimation (PCPE), that are required to develop energy-efficient CPR circuits and show how design parameter settings and limited fixed-point resolution affect the SNR penalty. 30-GBaud CPR circuit netlists synthesized in a 22-nm CMOS process technology allow us to study trade-offs between energy per bit and SNR penalty. We show that it is possible to reach an energy dissipation of around 1 pJ/bit at an SNR penalty of 0.6 dB for two-stage PCPE+BPS and mVV+BPS implementations, and that PCPE+BPS is the preferred choice thanks to its smaller area.
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| 3. |
- Börjeson, Erik, 1984, et al.
(författare)
-
Multi-Format Carrier Phase Recovery Using a Programmable Circuit
- 2021
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Ingår i: Optics InfoBase Conference Papers.
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Konferensbidrag (refereegranskat)abstract
- We introduce an application-specific circuit that can be programmed to efficiently perform blind carrier phase recovery for different modulation formats. A circuit implementation that supports QPSK/16/32/64QAM is evaluated.
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| 4. |
- Kan, Haorui, et al.
(författare)
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Digital Emulation of Time-Varying PMD for Real-Time DSP Evaluations
- 2021
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Ingår i: Asia Communications and Photonics Conference, ACP. - 2162-108X. - 9781957171005 ; M4H
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Konferensbidrag (refereegranskat)abstract
- We introduce a digital PMD emulator to accelerate BER analysis of coherent receiver DSPs. The emulator creates parameterizable, time-varying impairments, which we use to demonstrate real-time analysis of a CMA equalizer.
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