Single-Tap Precoders and Decoders for Multi-User MIMO FBMC-OQAM under Strong Channel Frequency Selectivity
Fran\c{c}ois Rottenberg, Xavier Mestre, Fran\c{c}ois Horlin,, J\'er\^ome Louveaux

TL;DR
This paper proposes a low-complexity single-tap precoding and decoding scheme for multi-user MIMO FBMC-OQAM systems that effectively handles strong channel frequency selectivity by optimizing MSE under ZF and MMSE criteria.
Contribution
It introduces a novel single-tap per-subcarrier precoding/decoding method that accounts for channel frequency selectivity without assuming flatness, improving performance in MU MIMO FBMC systems.
Findings
Optimized precoders and decoders improve MSE performance.
Extra BS antennas help mitigate channel frequency selectivity.
Simulation confirms effectiveness of the proposed approach.
Abstract
The design of linear precoders or decoders for multiuser (MU) multiple-input multiple-output (MIMO) filterbank multicarrier (FBMC) modulations in the case of strong channel frequency selectivity is presented. The users and the base station (BS) communicate using space division multiple access (SDMA). The low complexity proposed solution is based on a single tap per-subcarrier precoding/decoding matrix at the base station (BS) in the downlink/uplink. As opposed to classical approaches that assume flat channel frequency selectivity at the subcarrier level, the BS does not make this assumption and takes into account the distortion caused by channel frequency selectivity. The expression of the FBMC asymptotic mean squared error (MSE) in the case of strong channel selectivity derived in earlier works is developed and extended. The linear precoders and decoders are found by optimizing the MSE…
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Taxonomy
TopicsPAPR reduction in OFDM · Advanced Photonic Communication Systems · Optical Network Technologies
