Sum Throughput Maximization for MISO-Assisted Multi-User Downlink Transmissions in the FBL Regime

International Symposium on Wireless Communication Systems, pp. 1–6

Abstract

In this paper, we study a multiple-input single-output (MISO) assisted multi-user downlink network. To support low-latency communications, the transmissions to massive users are coded by finite blocklength (FBL) codes. For such network, an efficient power allocation design is provided to optimize the sum throughput. In particular, we first characterize the FBL throughput performance, following which a power allocation problem is formulated aiming at maximizing the sum throughput in the FBL regime. To address the formulated non-convex problem, we separate the complex expression of the objective function into two parts and then conduct different tight convex approximation methods, with which, an efficient successive convex approximation (SCA)-based approach is introduced. Simulation results validate our analytical model and reveal that the proposed approach converges effectively and achieve the performance close to results of the exhaustive search. Furthermore, we evaluate the impacts of blocklength, number of transmitter antennas, power constraints and number of users on the system performance.

Authors 5

1. Zhicheng Xiao Aachen INDA Institute

   Wuhan University · RWTH Aachen University

   Affiliation as printed

   Electronic Information School, Wuhan University,China

   Electronic Information School, Wuhan University, China

   INDA Institute, RWTH Aachen University, Germany

2. Yulin Hu Aachen INDA Institute

   Wuhan University · RWTH Aachen University

   Affiliation as printed

   Electronic Information School, Wuhan University,China

   Electronic Information School, Wuhan University, China

   INDA Institute, RWTH Aachen University, Germany

3. Chao Shen

   Shenzhen Research Institute of Big Data

   Affiliation as printed

   Shenzhen Research Institute of Big Data,China

   Shenzhen Research Institute of Big Data, China

4. Bo Ai

   Beijing Jiaotong University

   Affiliation as printed

   Beijing Jiaotong University,State Key Lab. of Rail Traffic Control and Safety

   State Key Lab. of Rail Traffic Control and Safety, Beijing Jiaotong University

5. Anke Schmeink Aachen INDA Institute

   RWTH Aachen University

   Affiliation as printed

   INDA Institute, RWTH Aachen University,Germany

   INDA Institute, RWTH Aachen University, Germany