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Low-Complexity Zero-Forcing Precoding for XL-MIMO Transmissions
- Publication Year :
- 2021
-
Abstract
- Deploying antenna arrays with an asymptotically large aperture will be central to achieving the theoretical gains of massive MIMO in beyond-5G systems. Such extra-large MIMO (XL-MIMO) systems experience propagation conditions which are not typically observed in conventional massive MIMO systems, such as spatial non-stationarities and near-field propagation. Moreover, standard precoding schemes, such as zero-forcing (ZF), may not apply to XL-MIMO transmissions due to the prohibitive complexity associated with such a large-scale scenario. We propose two novel precoding schemes that aim at reducing the complexity without losing much performance. The proposed schemes leverage a plane-wave approximation and user grouping to obtain a low-complexity approximation of the ZF precoder. Our simulation results show that the proposed schemes offer a possibility for a performance and complexity trade-off compared to the benchmark schemes.<br />Comment: Submitted to Eusipco 2021
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2103.00971
- Document Type :
- Working Paper