### Abstract

The capacity of a discrete-time, multi-input multi-output (MIMO) channel with output quantization is investigated for different receiver architectures. A general framework for low-resolution quantization is proposed in which the antenna outputs are processed by analog combiners and sign quantizers are used for analog-to-digital conversion. The configuration of the analog combiners is chosen as a function of the channel realization so that the transmission rate can be maximized over the set of available configurations. To exemplify the proposed approach, four analog receiver architectures are considered: (a) sign quantization of the antenna outputs, (b) single antenna selection, (c) multiple antenna selection, and (d) linear processing of the antenna outputs. In each scenario, capacity is investigated as a function of the transmit power, the number of transmit/receive antennas and sign quantizers. In particular, it is shown that architecture (a) is sufficient to approach the optimal high signal-to-noise ratio (SNR)performance for a MIMO receiver in which the number of receive antennas is larger than the number of sign quantizers. Numerical evaluations of the average performance are presented for the case in which the channel gains are i.i.d. Gaussian distributed.

Original language | English |
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Title of host publication | 2017 IEEE Information Theory Workshop, ITW 2017 |

Publisher | Institute of Electrical and Electronics Engineers Inc. |

Pages | 599-603 |

Number of pages | 5 |

ISBN (Electronic) | 9781509030972 |

DOIs | |

State | Published - 31 Jan 2018 |

Event | 2017 IEEE Information Theory Workshop, ITW 2017 - Kaohsiung, Taiwan Duration: 6 Nov 2017 → 10 Nov 2017 |

### Publication series

Name | IEEE International Symposium on Information Theory - Proceedings |
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Volume | 2018-January |

ISSN (Print) | 2157-8095 |

### Conference

Conference | 2017 IEEE Information Theory Workshop, ITW 2017 |
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Country | Taiwan |

City | Kaohsiung |

Period | 6/11/17 → 10/11/17 |

### Keywords

- Analog-to-digital conversion
- Channel output quantization
- MIMO channel
- One-bit quantization

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## Cite this

*2017 IEEE Information Theory Workshop, ITW 2017*(pp. 599-603). (IEEE International Symposium on Information Theory - Proceedings; Vol. 2018-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ITW.2017.8277991