Wideband Precoding for MIMO-OFDM Systems With Per-Antenna Power Constraints

This letter describes a wideband precoding design for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems under per-antenna power constraints, wherein all subcarriers share one wideband precoder. With new insight into the objective function, we first reformu...

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Published in:IEEE communications letters 2021-10, Vol.25 (10), p.3423-3426
Main Authors: Hu, Xianzhi, Dai, Xuchu
Format: Article
Language:English
Subjects:
Algorithms
Antennas
Broadband
MIMO
MIMO communication
Narrowband
Optimization
Orthogonal Frequency Division Multiplexing
per-antenna power constraints
Precoding
Probability theory
stochastic optimization
Stochastic processes
Transmitting antennas
Wideband
Wideband precoding
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description This letter describes a wideband precoding design for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems under per-antenna power constraints, wherein all subcarriers share one wideband precoder. With new insight into the objective function, we first reformulate the precoding designing as a stochastic optimization problem. Then, an algorithm based on the free probability theory is proposed to solve the stochastic optimization problem; consequently, a wideband precoder is obtained, with a computational complexity nearly equivalent to that required for a single narrowband precoder. The effectiveness of this wideband precoder is validated through simulations.
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subjects Algorithms
Antennas
Broadband
MIMO
MIMO communication
Narrowband
Optimization
Orthogonal Frequency Division Multiplexing
per-antenna power constraints
Precoding
Probability theory
stochastic optimization
Stochastic processes
Transmitting antennas
Wideband
Wideband precoding
title Wideband Precoding for MIMO-OFDM Systems With Per-Antenna Power Constraints
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