Delay Performance of the Multiuser MISO Downlink Under Imperfect CSI and Finite-Length Coding

被引：48

作者：

Schiessl, Sebastian ^{[1
]}

Gross, James ^{[1
]}

Skoglund, Mikael ^{[1
]}

Caire, Giuseppe ^{[2
]}

机构：

[1] KTH Royal Inst Technol, Sch Elect Engn & Comp Sci, Div Informat Sci & Engn, S-10044 Stockholm, Sweden

[2] Tech Univ Berlin, Elect Engn & Comp Sci Dept, D-10587 Berlin, Germany

来源：

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS | 2019年 / 37卷 / 04期

基金：

瑞典研究理事会;

关键词：

Multiple-input multiple-output (MIMO); multiuser diversity; zero-forcing beamforming (ZFBF); stochastic network calculus; imperfect CSI; finite blocklength regime; WIRELESS COMMUNICATIONS; EFFECTIVE CAPACITY; MIMO; CHANNELS; FEEDBACK; QUALITY; DESIGN;

D O I：

10.1109/JSAC.2019.2898759

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We use stochastic network calculus to investigate the delay performance of a multiuser MISO system with zero-forcing beamforming. First, we consider ideal assumptions with long codewords and perfect CSI at the transmitter, where we observe a strong channel hardening effect that results in very high reliability with respect to the maximum delay of the application. We then study the system under more realistic assumptions with imperfect CSI and finite blocklength channel coding. These effects lead to interference and to transmission errors, and we derive closed-form approximations for the resulting error probability. Compared to the ideal case, imperfect CSI and finite length coding cause massive degradations in the average transmission rate. Surprisingly, the system nevertheless maintains the same qualitative behavior as in the ideal case: as long as the average transmission rate is higher than the arrival rate, the system can still achieve very high reliability with respect to the maximum delay.

引用

页码：765 / 779

页数：15

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