Dynamic Subarrays for Hybrid Precoding in Wideband mmWave MIMO Systems

Sungwoo Park, Ahmed Alkhateeb, Robert W. Heath

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Hybrid analog/digital precoding architectures can address the tradeoff between achievable spectral efficiency and power consumption in large-scale MIMO systems. This makes them a promising candidate for millimeter wave systems, which deploy large antenna arrays at both the transmitter and the receiver to guarantee sufficient received signal power. Most prior work on hybrid precoding focused on narrowband channels and assumed fully connected hybrid architectures. Millimeter wave (mmWave) systems, though, are expected to be wideband with frequency selectivity. In this paper, a closed-form solution for fully connected OFDM-based hybrid analog/digital precoding is developed for frequency selective mmWave systems. This solution is then extended to partially connected but fixed architectures in which each RF chain is connected to a specific subset of the antennas. The derived solutions give insights into how the hybrid subarray structures should be designed. Based on this, a novel technique that dynamically constructs the hybrid subarrays knowing the long-term channel characteristics is developed. Simulation results show that the proposed hybrid precoding solutions achieve spectral efficiencies close to that obtained with fully digital architectures in wideband mmWave channels. Furthermore, the results indicate that the developed dynamic subarray solution outperforms the fixed hybrid subarray structures in various system and channel conditions.

Original languageEnglish (US)
Article number7880698
Pages (from-to)2907-2920
Number of pages14
JournalIEEE Transactions on Wireless Communications
Volume16
Issue number5
DOIs
StatePublished - May 1 2017
Externally publishedYes

Fingerprint

Precoding
MIMO Systems
Millimeter Wave
MIMO systems
Millimeter waves
Spectral Efficiency
Antenna arrays
Orthogonal frequency division multiplexing
Transmitters
Analogue
Electric power utilization
Antenna Arrays
Antennas
Large-scale Systems
Selectivity
Orthogonal Frequency Division multiplexing (OFDM)
Closed-form Solution
Transmitter
Power Consumption
Antenna

Keywords

  • Hybrid precoding
  • millimeter wave systems
  • MIMO
  • subarrays
  • wideband

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Dynamic Subarrays for Hybrid Precoding in Wideband mmWave MIMO Systems. / Park, Sungwoo; Alkhateeb, Ahmed; Heath, Robert W.

In: IEEE Transactions on Wireless Communications, Vol. 16, No. 5, 7880698, 01.05.2017, p. 2907-2920.

Research output: Contribution to journalArticle

@article{1a292e34267f4045826aaad9151d5a79,
title = "Dynamic Subarrays for Hybrid Precoding in Wideband mmWave MIMO Systems",
abstract = "Hybrid analog/digital precoding architectures can address the tradeoff between achievable spectral efficiency and power consumption in large-scale MIMO systems. This makes them a promising candidate for millimeter wave systems, which deploy large antenna arrays at both the transmitter and the receiver to guarantee sufficient received signal power. Most prior work on hybrid precoding focused on narrowband channels and assumed fully connected hybrid architectures. Millimeter wave (mmWave) systems, though, are expected to be wideband with frequency selectivity. In this paper, a closed-form solution for fully connected OFDM-based hybrid analog/digital precoding is developed for frequency selective mmWave systems. This solution is then extended to partially connected but fixed architectures in which each RF chain is connected to a specific subset of the antennas. The derived solutions give insights into how the hybrid subarray structures should be designed. Based on this, a novel technique that dynamically constructs the hybrid subarrays knowing the long-term channel characteristics is developed. Simulation results show that the proposed hybrid precoding solutions achieve spectral efficiencies close to that obtained with fully digital architectures in wideband mmWave channels. Furthermore, the results indicate that the developed dynamic subarray solution outperforms the fixed hybrid subarray structures in various system and channel conditions.",
keywords = "Hybrid precoding, millimeter wave systems, MIMO, subarrays, wideband",
author = "Sungwoo Park and Ahmed Alkhateeb and Heath, {Robert W.}",
year = "2017",
month = "5",
day = "1",
doi = "10.1109/TWC.2017.2671869",
language = "English (US)",
volume = "16",
pages = "2907--2920",
journal = "IEEE Transactions on Wireless Communications",
issn = "1536-1276",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "5",

}

TY - JOUR

T1 - Dynamic Subarrays for Hybrid Precoding in Wideband mmWave MIMO Systems

AU - Park, Sungwoo

AU - Alkhateeb, Ahmed

AU - Heath, Robert W.

PY - 2017/5/1

Y1 - 2017/5/1

N2 - Hybrid analog/digital precoding architectures can address the tradeoff between achievable spectral efficiency and power consumption in large-scale MIMO systems. This makes them a promising candidate for millimeter wave systems, which deploy large antenna arrays at both the transmitter and the receiver to guarantee sufficient received signal power. Most prior work on hybrid precoding focused on narrowband channels and assumed fully connected hybrid architectures. Millimeter wave (mmWave) systems, though, are expected to be wideband with frequency selectivity. In this paper, a closed-form solution for fully connected OFDM-based hybrid analog/digital precoding is developed for frequency selective mmWave systems. This solution is then extended to partially connected but fixed architectures in which each RF chain is connected to a specific subset of the antennas. The derived solutions give insights into how the hybrid subarray structures should be designed. Based on this, a novel technique that dynamically constructs the hybrid subarrays knowing the long-term channel characteristics is developed. Simulation results show that the proposed hybrid precoding solutions achieve spectral efficiencies close to that obtained with fully digital architectures in wideband mmWave channels. Furthermore, the results indicate that the developed dynamic subarray solution outperforms the fixed hybrid subarray structures in various system and channel conditions.

AB - Hybrid analog/digital precoding architectures can address the tradeoff between achievable spectral efficiency and power consumption in large-scale MIMO systems. This makes them a promising candidate for millimeter wave systems, which deploy large antenna arrays at both the transmitter and the receiver to guarantee sufficient received signal power. Most prior work on hybrid precoding focused on narrowband channels and assumed fully connected hybrid architectures. Millimeter wave (mmWave) systems, though, are expected to be wideband with frequency selectivity. In this paper, a closed-form solution for fully connected OFDM-based hybrid analog/digital precoding is developed for frequency selective mmWave systems. This solution is then extended to partially connected but fixed architectures in which each RF chain is connected to a specific subset of the antennas. The derived solutions give insights into how the hybrid subarray structures should be designed. Based on this, a novel technique that dynamically constructs the hybrid subarrays knowing the long-term channel characteristics is developed. Simulation results show that the proposed hybrid precoding solutions achieve spectral efficiencies close to that obtained with fully digital architectures in wideband mmWave channels. Furthermore, the results indicate that the developed dynamic subarray solution outperforms the fixed hybrid subarray structures in various system and channel conditions.

KW - Hybrid precoding

KW - millimeter wave systems

KW - MIMO

KW - subarrays

KW - wideband

UR - http://www.scopus.com/inward/record.url?scp=85021728711&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85021728711&partnerID=8YFLogxK

U2 - 10.1109/TWC.2017.2671869

DO - 10.1109/TWC.2017.2671869

M3 - Article

VL - 16

SP - 2907

EP - 2920

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

SN - 1536-1276

IS - 5

M1 - 7880698

ER -