Results 41 to 50 of about 21,014 (291)
Signal Shaping for BICM at Low SNR [PDF]
, 2012 The mutual information of bit-interleaved coded modulation (BICM) systems, sometimes called the BICM capacity, is investigated at low signal-to-noise ratio (SNR), i.e., in the wideband regime. A new linear transform that depends on bits' probabilities is
Agrell, Erik, Alvarado, Alex
core +2 more sources
Photonics, 2022 As a typical high-order modulation format optimization technology, constellation probability shaping enhances generalized mutual information (GMI) by optimizing the probability distribution of each constellation point of the signal.
Yao Zhang +3 more
doaj +1 more source
IEEE Photonics Journal, 2022 In this paper, we propose a novel carrier-less amplitude/phase modulation with probabilistic shaping based on the Lorenz model and superposition method (LS-PS-CAP).
Yu Gu +8 more
doaj +1 more source
Revisiting Probabilistic Constellation Shaping in Unamplified Coherent Optical Links
2023 Optical Fiber Communications Conference and Exhibition (OFC), 2023 Considering an unamplified 4 00ZR-compatible system, we experimentally demonstrate that the reverse Maxwell-Boltzmann distribution significantly enhances PCS performance. With bit-rate adaptation down to 250 Gbps, we find power budget gains of more than 2 dB.
Oliveira, Beatriz M. +5 more
openaire +1 more source
IEEE Access, 2020 Research and development of Li-Fi (Light Fidelity) in Internet-of-things (IoT) has created significant interest among researchers. The low-cost version of standard color shift keying (CSK) modulation scheme having single photodetector (PD) at the ...
Dil Nashin Anwar, Anand Srivastava
doaj +1 more source
Experimental Verification of Rate Flexibility and Probabilistic Shaping by 4D Signaling [PDF]
, 2018 The rate flexibility and probabilistic shaping gain of $4$-dimensional signaling is experimentally tested for short-reach, unrepeated transmission. A rate granularity of 0.5 bits/QAM symbol is achieved with a distribution matcher based on a simple look ...
Böcherer, Georg +6 more
core +2 more sources
A Novel Multi-Level Constellation Compression Modulation for GFDM-PON
IEEE Photonics Journal, 2019 In this paper, for the first time, a novel multi-level constellation compression modulation (MCCM) is proposed and applied for generalized frequency division multiplexing passive optical network (GFDM-PON).
Lei Jiang +10 more
doaj +1 more source
A Simple Nonlinearity-Tailored Probabilistic Shaping Distribution for Square QAM [PDF]
, 2017 A new probabilistic shaping distribution that outperforms Maxwell-Boltzmann is studied for the nonlinear fiber channel. Additional gains of 0.1 bit/symbol MI or 0.2 dB SNR for both DP-256QAM and DP-1024QAM are reported after 200 km nonlinear fiber ...
Alvarado, Alex +8 more
core +2 more sources
Protograph-Based LDPC Code Design for Shaped Bit-Metric Decoding [PDF]
, 2015 A protograph-based low-density parity-check (LDPC) code design technique for bandwidth-efficient coded modulation is presented. The approach jointly optimizes the LDPC code node degrees and the mapping of the coded bits to the bit-interleaved coded ...
Böcherer, Georg +2 more
core +3 more sources
IEEE Photonics Journal, 2019 Due to the rapid growth of high-resolution services, low earth orbit satellite-to-ground (LEO-StG) optical communications are expected to provide higher speed and better receiver sensitivity transmission.
Huan Chen +5 more
doaj +1 more source