The DoF region of order-(K - 1) messages for the K-user MIMO broadcast channel with delayed CSIT

Zhang，Tong1; Wang，Shuai1; Wang，Taotao2; Wang，Rui1

10.1109/ICCC52777.2021.9580280

2021-07-28

2377-8644

978-1-6654-4386-9

2021 IEEE/CIC International Conference on Communications in China, ICCC 2021

688-693

28-30 July 2021

Xiamen, China

This paper theoretically characterizes the degrees-of-freedom (DoF) region of $\text{order}-(K-1)$ messages for the K-user multiple-input multiple-output (MIMO) broadcast channel with delayed channel state information at the transmitter (CSIT) and arbitrary antenna configurations, where the transmitter has $M$ antennas and the receiver $i=1, 2, \cdots, K$ has $N_{i}$ antennas. For the converse, we first derive the DoF region of order $(K-1)$ messages for the $K$ -user MIMO broadcast channel with no CSIT and arbitrary antenna configurations with the aid of the proposed Genie-bound, and then establish the DoF outer region. For the achievability, we first design a 2-phase transmission scheme, and then propose a backward/forward cancellation algorithm for decoding. Specifically, we efficiently derive the achievable DoF region from the designed transmission scheme by transformation approach. The main implication of this paper is that for the order- $(K-1)$ messages of $K$ -user MIMO broadcast channel, the DoF region with delayed CSIT is larger than the DoF region with no CSIT when $N_{2} < M$, where $N_{1}\leq N_{2}\leq\cdots\leq N_{K}$.

Antenna theory Transmitting antennas Receiving antennas MIMO Decoding MIMO communication Channel state information

第一

英语

EI

20214711202093

Antennas ; Broadcasting ; Channel state information ; Codes (symbols) ; Degrees of freedom (mechanics) ; MIMO systems ; Signal receivers ; Transmissions

Mechanical Transmissions:602.2 ; Data Processing and Image Processing:723.2 ; Mechanics:931.1

2-s2.0-85119360647

Scopus

1.Southern University of Science and Technology,Department of Electrical and Electronic Engineering,Shenzhen,China
2.College of Electronics and Information Engineering,Shenzhen University,Shenzhen,China

Zhang，Tong,Wang，Shuai,Wang，Taotao,et al. The DoF region of order-(K - 1) messages for the K-user MIMO broadcast channel with delayed CSIT[C],2021:688-693.