### Abstract

Under the assumption of large scale antenna, we analyze the sum rate of circular layout distributed antenna systems (CL-DAS). First, we propose a concept of virtual base station and an expected large scale fading (E-LSF) for an arbitrarily located user as a function of the locations of users and distributed antennas and a path loss exponent. Based on E-LSF, we derive an approximated sum rate of CL-DAS whose form is identical to the sum rate of centralized multiple-input multiple-output (C-MIMO) systems. These results make it possible that the sum rate of CL-DAS with arbitrary beamforming schemes or power allocation algorithms can be evaluated using the existing approaches for C-MIMO systems. Simulation results verify that our analyses with E-LSF are valid for practical systems.

Original language | English |
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Article number | 8423682 |

Pages (from-to) | 121-124 |

Number of pages | 4 |

Journal | IEEE Wireless Communications Letters |

Volume | 8 |

Issue number | 1 |

DOIs | |

Publication status | Published - 2019 Feb |

### All Science Journal Classification (ASJC) codes

- Control and Systems Engineering
- Electrical and Electronic Engineering

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## Cite this

*IEEE Wireless Communications Letters*,

*8*(1), 121-124. [8423682]. https://doi.org/10.1109/LWC.2018.2861757