376 citations · 2.9k across the 110 of their papers we have counts for
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Four-Dimensional Coded Modulation with Bit-wise Decoders for Future Optical Communications
Alex Alvarado, Erik Agrell
Coded modulation (CM) is the combination of forward error correction (FEC) and multilevel constellations. Coherent optical communication systems result in a four-dimensional (4D) s…
Terminated and Tailbiting Spatially-Coupled Codes with Optimized Bit Mappings for Spectrally Efficient Fiber-Optical Systems
Christian Häger, Alexandre Graell i Amat, Fredrik Brännström +2
We study the design of spectrally efficient fiber-optical communication systems based on different spatially coupled (SC) forward error correction (FEC) schemes. In particular, we…
On the Information Loss of the Max-Log Approximation in BICM Systems
Mikhail Ivanov, Christian Häger, Fredrik Brännström +3
We present a comprehensive study of the information rate loss of the max-log approximation for -ary pulse-amplitude modulation (PAM) in a bit-interleaved coded modulation (BICM)…
Improving soft FEC performance for higher-order modulations via optimized bit channel mappings
Christian Häger, Alexandre Graell i Amat, Fredrik Brännström +2
Soft forward error correction with higher-order modulations is often implemented in practice via the pragmatic bit-interleaved coded modulation paradigm, where a single binary code…
Capacity of a Nonlinear Optical Channel with Finite Memory
Erik Agrell, Alex Alvarado, Giuseppe Durisi +1
The channel capacity of a nonlinear, dispersive fiber-optic link is revisited. To this end, the popular Gaussian noise (GN) model is extended with a parameter to account for the fi…