Mask-compliant orthogonal precoding for spectrally efficient OFDM
DATE:
2021-03
UNIVERSAL IDENTIFIER: http://hdl.handle.net/11093/4393
EDITED VERSION: https://ieeexplore.ieee.org/document/9272987/
UNESCO SUBJECT: 1299 Otras Especialidades Matemáticas
DOCUMENT TYPE: article
ABSTRACT
Orthogonal precoding constitutes a powerful technique to reduce spectrum sidelobes of multicarrier signals. This reduction is bought at the cost of introducing precoder redundancy, which results in some throughput loss and additional precoding/decoding complexity. When the goal is to meet some spectral emission mask constraints, it is desirable to avoid unnecessary sidelobe suppression in order to keep precoder redundancy at a minimum. In this context, we introduce a general framework under which we develop a novel Lagrange multiplier-based mask-compliant orthogonal precoder design targeting minimal redundancy. We also adapt to this framework two previously proposed designs based on spectral notches and minimum out-of-band emission, respectively, to explicitly incorporate mask constraints. Simulation results are provided to show the effectiveness of the proposed designs under different practical masks for multicarrier wireless systems.
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