Interference Exploitation-Based Hybrid Precoding with Low-Resolution DACs

Hybrid analog-digital precoding with low-resolution DACs, especially the one-bit case, has been shown to greatly reduce hardware costs and operational power consumption in massive MIMO systems, at the expense of increased radiated power. To address this challenge, we extend the constructive-interfer...

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Published in:2019 IEEE 8th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP) pp. 604 - 608
Main Authors: Zheng, Xin, Hegde, Ganapati, Pesavento, Marius
Format: Conference Proceeding
Language:English
Published: IEEE 01.12.2019
Subjects:
Antennas
Computer architecture
Interference
MIMO communication
Optimization
Precoding
Radio frequency
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Abstract Hybrid analog-digital precoding with low-resolution DACs, especially the one-bit case, has been shown to greatly reduce hardware costs and operational power consumption in massive MIMO systems, at the expense of increased radiated power. To address this challenge, we extend the constructive-interference-based precoding to this low-cost architecture. We formulate an optimization problem for computing the constructive-interference-based hybrid analog-digital precoders with 1-bit resolution DACs. Our objective is to maximize the quality-of-service at the users subject to a given transmit power budget. Since the resulting problem is a mixed-integer nonlinear program, which is difficult to solve optimally, we decompose the problem into two subtasks, namely, analog precoding and digital precoding. For fixed analog precoders, we formulate a mixed-integer convex program to compute the 1-bit resolution digital precoders. Furthermore, we devise a suboptimal method to solve the formulated mixed-integer convex program problem with low complexity. Simulation results are provided to evaluate the proposed methods.
AbstractList Hybrid analog-digital precoding with low-resolution DACs, especially the one-bit case, has been shown to greatly reduce hardware costs and operational power consumption in massive MIMO systems, at the expense of increased radiated power. To address this challenge, we extend the constructive-interference-based precoding to this low-cost architecture. We formulate an optimization problem for computing the constructive-interference-based hybrid analog-digital precoders with 1-bit resolution DACs. Our objective is to maximize the quality-of-service at the users subject to a given transmit power budget. Since the resulting problem is a mixed-integer nonlinear program, which is difficult to solve optimally, we decompose the problem into two subtasks, namely, analog precoding and digital precoding. For fixed analog precoders, we formulate a mixed-integer convex program to compute the 1-bit resolution digital precoders. Furthermore, we devise a suboptimal method to solve the formulated mixed-integer convex program problem with low complexity. Simulation results are provided to evaluate the proposed methods.
Author Hegde, Ganapati
Pesavento, Marius
Zheng, Xin
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  surname: Pesavento
  fullname: Pesavento, Marius
  organization: Communication Systems Group, Technische Universität Darmstadt,Germany
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Snippet Hybrid analog-digital precoding with low-resolution DACs, especially the one-bit case, has been shown to greatly reduce hardware costs and operational power...
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StartPage 604
SubjectTerms Antennas
Computer architecture
Interference
MIMO communication
Optimization
Precoding
Radio frequency
Title Interference Exploitation-Based Hybrid Precoding with Low-Resolution DACs
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