Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of GothenburgSE951 papers
- Centre National de la Recherche ScientifiqueFR805 papers
- Leiden UniversityNL590 papers
- Max Planck Institute for Radio AstronomyDE405 papers
- European Southern ObservatoryCL356 papers
- Center for Astrophysics Harvard & SmithsonianUS313 papers
- Leiden Observatory304 papers
- California Institute of TechnologyUS296 papers
- National Astronomical Observatory of JapanJP280 papers
- Observatoire de ParisFR268 papers
- Stockholm UniversitySE262 papers
- Centro de AstrobiologíaES252 papers
13 papers · 2 filters
High-SNR Asymptotics of Mutual Information for Discrete Constellations with Applications to BICM
Alex Alvarado, Fredrik Brannstrom, Erik Agrell +1
Asymptotic expressions of the mutual information between any discrete input and the corresponding output of the scalar additive white Gaussian noise channel are presented in the li…
General BER Expression for One-Dimensional Constellations
Mikhail Ivanov, Fredrik Brännström, Alex Alvarado +1
A novel general ready-to-use bit-error rate (BER) expression for one-dimensional constellations is developed. The BER analysis is performed for bit patterns that form a labeling. T…
Phase Noise Estimation for Uncoded/Coded SISO and MIMO Systems
Arif Onder Isikman, Hani Mehrpouyan, Alexandre Graell i Amat
Non-ideal oscillators both at the transmitter and the receiver introduces time varying phase noise which interacts with the transmitted data in a non-linear fashion. Phase noise be…
Nonbinary Spatially-Coupled LDPC Codes on the Binary Erasure Channel
Amina Piemontese, Alexandre Graell i Amat, Giulio Colavolpe
We analyze the asymptotic performance of nonbinary spatially-coupled low-density parity-check (SC-LDPC) codes built on the general linear group, when the transmission takes place o…
On Optimal TCM Encoders
Alex Alvarado, Alexandre Graell i Amat, Fredrik Brannstrom +1
An asymptotically optimal trellis-coded modulation (TCM) encoder requires the joint design of the encoder and the binary labeling of the constellation. Since analytical approaches…
Design of APSK Constellations for Coherent Optical Channels with Nonlinear Phase Noise
Christian Häger, Alexandre Graell i Amat, Alex Alvarado +1
We study the design of amplitude phase-shift keying (APSK) constellations for a coherent fiber-optical communication system where nonlinear phase noise (NLPN) is the main system im…
Conditions for a Monotonic Channel Capacity
Erik Agrell
Motivated by results in optical communications, where the performance can degrade dramatically if the transmit power is sufficiently increased, the channel capacity is characterize…
On the Exact BER of Bit-Wise Demodulators for One-Dimensional Constellations
Mikhail Ivanov, Fredrik Brannstrom, Alex Alvarado +1
The optimal bit-wise demodulator for M-ary pulse amplitude modulation (PAM) over the additive white Gaussian noise channel is analyzed in terms of uncoded bit-error rate (BER). New…
Using Short Synchronous WOM Codes to Make WOM Codes Decodable
Nicolas Bitouzé, Alexandre Graell i Amat, Eirik Rosnes
In the framework of write-once memory (WOM) codes, it is important to distinguish between codes that can be decoded directly and those that require that the decoder knows the curre…
Capacity Pre-Log of Noncoherent SIMO Channels via Hironaka's Theorem
Veniamin I. Morgenshtern, Erwin Riegler, Wei Yang +4
We find the capacity pre-log of a temporally correlated Rayleigh block-fading SIMO channel in the noncoherent setting. It is well known that for block-length L and rank of the chan…
A Two-Dimensional Signal Space for Intensity-Modulated Channels
Johnny Karout, Gerhard Kramer, Frank R. Kschischang +1
A two-dimensional signal space for intensity- modulated channels is presented. Modulation formats using this signal space are designed to maximize the minimum distance between sign…
Signal Shaping for BICM at Low SNR
Erik Agrell, Alex Alvarado
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 wide…
On Geometric Upper Bounds for Positioning Algorithms in Wireless Sensor Networks
Mohammad Reza Gholami, Erik G. Ström, Henk Wymeersch +1
This paper studies the possibility of upper bounding the position error of an estimate for range based positioning algorithms in wireless sensor networks. In this study, we argue t…