611 citations · 2.4k across the 80 of their papers we have counts for
4 papers · 2 filters
A Low-Complexity Detector for Memoryless Polarization-Multiplexed Fiber-Optical Channels
Christian Häger, Lotfollah Beygi, Erik Agrell +3
A low-complexity detector is introduced for polarization-multiplexed M-ary phase shift keying modulation in a fiber-optical channel impaired by nonlinear phase noise, generalizing…
Achievable Rates for Four-Dimensional Coded Modulation with a Bit-Wise Receiver
Alex Alvarado, Erik Agrell
We study achievable rates for four-dimensional (4D) constellations for spectrally efficient optical systems based on a (suboptimal) bit-wise receiver. We show that PM-QPSK outperfo…
Optimized Bit Mappings for Spatially Coupled LDPC Codes over Parallel Binary Erasure Channels
Christian Häger, Alexandre Graell i Amat, Alex Alvarado +2
In many practical communication systems, one binary encoder/decoder pair is used to communicate over a set of parallel channels. Examples of this setup include multi-carrier transm…
On the Asymptotic Performance of Bit-Wise Decoders for Coded Modulation
Mikhail Ivanov, Alex Alvarado, Fredrik Brannstrom +1
Two decoder structures for coded modulation over the Gaussian and flat fading channels are studied: the maximum likelihood symbol-wise decoder, and the (suboptimal) bit-wise decode…