Beamforming via Large and Dense Antenna Arrays Above a Clutter
| Autor: | Gert Frølund Pedersen, Osama N. Alrabadi, Elpiniki Tsakalaki, Howard Huang |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Beamforming
Capacity Computer Networks and Communications Computer science MIMO EM Coupling Topology Interference (wave propagation) Multiplexing Clustering channels Antenna array Large Arrays Control theory Side lobe High Order Sectorization Clutter Electrical and Electronic Engineering Antenna (radio) Computer Science::Information Theory |
| Zdroj: | Alrabadi, O, Tsakalaki, E, Huang, H & Pedersen, G F 2013, ' Beamforming via large and dense antenna arrays above a clutter ', I E E E Journal on Selected Areas in Communications, vol. 31, no. 2, pp. 314-325 . https://doi.org/10.1109/JSAC.2013.130218 |
| ISSN: | 0733-8716 |
| DOI: | 10.1109/jsac.2013.130218 |
| Popis: | The paper sheds light on the beamforming (BF) performance of large (potentially unconstrained in size) as well as dense (but physically constrained in size) antenna arrays when equipped with arbitrarily many elements. Two operational modes are investigated: Single-layer BF and multi-layer BF. In the first mode, a realistic BF criterion namely the average BF gain is revisited and employed to understand the far-field and the near-field effects on the BF performance of large-scale antennas above a clutter. The diminishing throughput returns in a single-layer BF mode versus the number of antennas necessitate multi-layering. In the multi-layer BF mode, the RF coverage is divided into a number of directive non-overlapping sector-beams in a deterministic manner within a multi-user multi-input multi-output (MIMO) system. The optimal number of layers that maximizes the user's sum-rate given a constrained antenna array is found as a compromise between the multiplexing gain (associated with the number of sector-beams) and the inter-beam interference, represented by the side lobe level (SLL). |
| Databáze: | OpenAIRE |
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