A Novel Scheme to Reduce the ONU's DSP Complexity for IMDD-OFDMA-PON

Lian, Bin; Feng, Nan; Wei, Zhongcheng

doi:10.1109/icocn55511.2022.9901228

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2024

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“…Optimizations for this scheme commonly focus on two areas: improving DSP algorithms and expanding ONU capacity through branching ratio or power budget enhancements. Examples of such optimizations include the OFDMA direct detection scheme, which reduces DSP complexity [5], and the 50Gbps equalization-free IMDD scheme [6]. Although system performance improves to a certain extent after optimization, it remains inadequate in achieving high power budget at a low cost, and presents technical challenges such as high system cost and algorithm complexity.…”

Section: Introductionmentioning

confidence: 99%

Low Overhead Adaptive Channel Equalizations for Upstream Burst Reception in 200Gbps Intensity Modulation-Coherent PONs

Sun,

Yang,

Chen

et al. 2024

Frontiers in Artificial Intelligence and Applications

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This paper presents a 200Gbps PON uplink burst coherent reception system that utilizes polarization-independent 4PAM optical intensity modulation-polarization diversity. To accommodate the burst changes in the PON uplink, we propose an adaptive channel equalization algorithm based on training sequences. This algorithm is characterized by low overhead, allowing for fast convergence. Simulation results demonstrate that adaptive compensation of PMD is feasible with a mere 18.5ns of preamble overhead. Additionally, by including only one SOA as a pre-amplifier in the OLT, a system power budget exceeding 35dB can be achieved.

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Section: Introductionmentioning

confidence: 99%