67 citations · 172 across the 6 of their papers we have counts for
6 papers
Location-Aided Pilot Contamination Avoidance for Massive MIMO Systems
L. Srikar Muppirisetty, Themistoklis Charalambous, Johnny Karout +2
Pilot contamination, defined as the interference during the channel estimation process due to reusing the same pilot sequences in neighboring cells, can severely degrade the perfor…
Achievable Rates of Multidimensional Rotationally Invariant Distributions
Johnny Karout, Rene'-Jean Essiambre, Erik Agrell +1
The maximum achievable rate or mutual informa- tion of multidimensional rotationally invariant distributions in the presence of additive white Gaussian noise is analyzed. A simple…
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…
Bandlimited Intensity Modulation
Mehrnaz Tavan, Erik Agrell, Johnny Karout
In this paper, the design and analysis of a new bandwidth-efficient signaling method over the bandlimited intensity-modulated direct-detection (IM/DD) channel is presented. The cha…
Optimizing Constellations for Single-Subcarrier Intensity-Modulated Optical Systems
Johnny Karout, Erik Agrell, Krzysztof Szczerba +1
We optimize modulation formats for the additive white Gaussian noise channel with nonnegative input, also known as the intensity-modulated direct-detection channel, with and withou…
Designing Power-Efficient Modulation Formats for Noncoherent Optical Systems
Johnny Karout, Erik Agrell, Krzysztof Szczerba +1
We optimize modulation formats for the additive white Gaussian noise channel with a nonnegative input constraint, also known as the intensity-modulated direct detection channel, wi…