Enabling Massive Connections Using Hybrid Beamforming in Terahertz Micro-Scale Networks

Hang Yuan, Nan Yang, Kai Yang, Chong Han, Jianping An

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    10 Citations (Scopus)

    Abstract

    We propose a novel hybrid beamforming (BF) scheme with distance-aware multi-carrier (DAMC) modulation and beam division multiple access (BDMA) to enable massive connections in terahertz (THz) micro-scale networks. This scheme breaks a fundamental limitation in hybrid BF, i.e., the number of users that are simultaneously supported cannot exceed the number of RF chains. Some unique properties of THz channels, such as high distance-and-frequency dependence, high sparsity, and small angular spread, are exploited in this scheme. First, we propose a user grouping scheme with rough beam pre-scanning and a DAMC spectrum allocation scheme to eliminate intragroup interference. Then, we propose a wideband hybrid BF designing algorithm using the principles of BDMA to control inter-group interference. Furthermore, we propose an iterative power allocation strategy to maximize the achievable sum-rate of the network. Simulation results are presented to show that our proposed hybrid BF DAMC-BDMA scheme achieves higher sum-rate than the fully digital BF scheme in the high transmit power regime, due to the high sparsity of THz channels. Simulation results also demonstrate that our iterative power allocation strategy has strong robustness against uncertain interferences.

    Original languageEnglish
    Title of host publication2020 IEEE Wireless Communications and Networking Conference, WCNC 2020 - Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781728131061
    DOIs
    Publication statusPublished - May 2020
    Event2020 IEEE Wireless Communications and Networking Conference, WCNC 2020 - Seoul, Korea, Republic of
    Duration: 25 May 202028 May 2020

    Publication series

    NameIEEE Wireless Communications and Networking Conference, WCNC
    Volume2020-May
    ISSN (Print)1525-3511

    Conference

    Conference2020 IEEE Wireless Communications and Networking Conference, WCNC 2020
    Country/TerritoryKorea, Republic of
    CitySeoul
    Period25/05/2028/05/20

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