On channel reciprocity to activate uplink channel training for downlink wireless transmission in tactile internet applications

Chunhui Li, Shihao Yan, Nan Yang

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

3 Citations (Scopus)

Abstract

We determine, for the first time, the requirement on channel reciprocity to activate uplink channel training, instead of downlink channel training, to achieve a higher data rate for the downlink transmission from a multi-antenna base station to a single-antenna user. We first derive novel closed-form expressions for the lower bounds on the data rates achieved by the two channel training strategies by considering the impact of finite blocklength. The performance comparison result of these two strategies is determined by the amount of channel reciprocity that is utilized in the uplink channel training. We then derive an approximated expression for the minimum channel reciprocity that enables the uplink channel training to outperform the downlink channel training. Through numerical results, we demonstrate that this minimum channel reciprocity decreases as the blocklength decreases or the number of transmit antennas increases, which shows the necessity and benefits of activating the uplink channel training for short-packet communications with multiple transmit antennas. This work provides pivotal and unprecedented guidelines on choosing channel training strategies and channel reciprocity calibrations, offering valuable insights into latency reduction in the Tactile Internet applications.

Original languageEnglish
Title of host publication2018 IEEE International Conference on Communications Workshops (ICC Workshops)
Subtitle of host publicationproceedings
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1-6
Number of pages6
ISBN (Electronic)9781538643280
ISBN (Print)9781538643297
DOIs
Publication statusPublished - 2018
Event2018 IEEE International Conference on Communications Workshops, ICC Workshops 2018 - Kansas City, United States
Duration: 20 May 201824 May 2018

Publication series

Name
ISSN (Electronic)2474-9133

Conference

Conference2018 IEEE International Conference on Communications Workshops, ICC Workshops 2018
CountryUnited States
CityKansas City
Period20/05/1824/05/18

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  • Cite this

    Li, C., Yan, S., & Yang, N. (2018). On channel reciprocity to activate uplink channel training for downlink wireless transmission in tactile internet applications. In 2018 IEEE International Conference on Communications Workshops (ICC Workshops): proceedings (pp. 1-6). Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ICCW.2018.8403490