Journal ArticleDOI
Constellation Design for Memoryless Phase Noise Channels
Farbod Kayhan,Guido Montorsi +1 more
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TLDR
It is shown that the optimized constellations are much more robust with respect to the changes in the phase noise characteristics than the phase shift keying (PSK) modulation and quadrature amplitude modulation (QAM).Abstract:
In this paper, we optimize the constellation sets to be used in communication systems affected by phase noise. The main objective is to find the constellation which maximizes the channel mutual information under given power constraints. For any given constellation, the average mutual information (AMI) and the pragmatic average mutual information (PAMI) of the channel are calculated approximately, assuming that both the additive noise and phase noise are memoryless. Then, a simulated annealing algorithm is used to optimize the constellation. When the objective function is the PAMI, the proposed algorithm jointly optimizes the constellation and the binary labeling. We focus on constellations with 8, 16, 64 and 256 signals. The performances of the optimized constellations are compared with conventional constellations showing considerable gains in all system scenarios. In particular, it is shown that the optimized constellations are much more robust with respect to the changes in the phase noise characteristics than the phase shift keying (PSK) modulation and quadrature amplitude modulation (QAM).read more
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Journal ArticleDOI
Constructive Interference for Generic Constellations
TL;DR: The results indicate that optimal and relaxed constructive interference regions for the symbol-level precoding (SLP) problem in the downlink of a multiuser multiple-input single-output (MISO) channel allow further reduction of the transmit power without increasing the computational complexity at the transmitter or receiver.
Journal ArticleDOI
Symbol-Level Precoding Design Based on Distance Preserving Constructive Interference Regions
TL;DR: This paper investigates the symbol-level precoding (SLP) design problem in the downlink of a multiuser multiple-input single-output channel, and derives a simplified reformulation of this problem, which is less computationally complex.
Journal ArticleDOI
Constellation Design for Bit-Interleaved Coded Modulation (BICM) Systems in Advanced Broadcast Standards
Jon Barrueco,Jon Montalban,Cristina Regueiro,Manuel Velez,J.L. Ordiales,Heung-Mook Kim,Sung-Ik Park,Sunhyoung Kwon +7 more
TL;DR: A low complexity optimization algorithm for the design of optimal constellation schemes for bit-interleaved coded modulation (BICM) systems and shows a significant improvement in terms of system performance and BICM channel capacities under additive white Gaussian noise and Rayleigh independently and identically distributed channel conditions.
Journal ArticleDOI
Geometric Shaping of 2-D Constellations in the Presence of Laser Phase Noise
TL;DR: In this paper, a geometric shaping (GS) strategy was proposed to design 8, 16, 32, and 64 -ary modulation formats for the optical fiber channel impaired by both additive white Gaussian (AWGN) and phase noise.
Posted Content
Power Minimizer Symbol-Level Precoding: A Closed-Form Sub-Optimal Solution
TL;DR: Simulation results show that CF-SLP provides significant gains over ZFBF, while performing quite close to the optimal SLP in scenarios with rather small number of users, and a reduction of order $\mathbf {10^3}$ in computational time compared to the ideal solution.
References
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Journal ArticleDOI
Optimization by Simulated Annealing
TL;DR: There is a deep and useful connection between statistical mechanics and multivariate or combinatorial optimization (finding the minimum of a given function depending on many parameters), and a detailed analogy with annealing in solids provides a framework for optimization of very large and complex systems.
Book
Bit-Interleaved Coded Modulation
TL;DR: The goal of this paper is to present in a comprehensive fashion the theory underlying bit-interleaved coded modulation, to provide tools for evaluating its performance, and to give guidelines for its design.
Journal ArticleDOI
Bit-Interleaved Coded Modulation
TL;DR: The theoretical foundations of BICM are reviewed under the unified framework of error exponents for mismatched decoding, which allows an accurate analysis without any particular assumptions on the length of the interleaver or independence between the multiple bits in a symbol.
Journal ArticleDOI
Optimization of Two-Dimensional Signal Constellations in the Presence of Gaussian Noise
TL;DR: In this paper an asymptotic (large signal-to-noise ratio) expression is derived for the error rate and it is rigorously proved in the Appendix that the optimum constellations tend toward an equilateral structure, and become uniformly distributed in a circle.
Journal ArticleDOI
On the capacity-achieving distribution of the discrete-time noncoherent and partially coherent AWGN channels
Michael Katz,Shlomo Shamai +1 more
TL;DR: The communication limits over rapid phase-varying channels are investigated and the capacity of a discrete- time noncoherent additive white Gaussian noise (NCAWGN) channel under the average power constraint is considered.