.png){kind=icon}
返回
On Lattice-Based Broadcasting for Massive-User MIMO: Practical Algorithms and Optimization
.png){kind=icon}
PRE
AI
DOI：10.1109/TWC.2024.3442787.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
This paper studies a lattice-based broadcasting (LBC) scheme for a single-cell downlink system. The base station (BS) has N antennas and the K user-equipments (UEs) have a single-antenna. The system is referred to as massive-user MIMO (mU-MIMO) when K is very large. At the transmitter side, the BS encodes the messages for the UEs with state-of-the-art channel codes and q-PAM modulation. We suggest a codeword-level precoding, which transforms the K UEs' coded sequences by an invertible integer matrix A(-1) over Z(q), resulting in K codeword-level precoded (CLP) streams. Then, the CLP streams undergo a linear signal-level precoding (SLP) with regularized integer-forcing, and the resultant signals are transmitted via the N antennas of BS. The operations of CLP and SLP are both linear. At the receiver side, each UE attempts to compute an integer-combination (ICB) of the K CLP streams w.r.t. the integer matrix A, which turns out to be its desired message thanks to the CLP. For computing the ICB, we put forth new soft detection algorithms, which efficiently calculate the a posteriori probability of ICB over the lattice. The complexity is shown to be (much) less than O(Kq), which is suited for large values of K. Further, we develop a particle swarm based approach that jointly optimizes A and the power allocation matrix. Numerical results demonstrate dramatically enhanced performance over baseline schemes including regularized zero-forcing and vector perturbation precoding, for both slow and fast fading channels.
Keyword:
Streams
Precoding
Lattices
Downlink
Codes
Vectors
Broadcasting
Multi-user MIMO
massive access
coded modulation
lattice
compute-forward
physical-layer network coding
soft detection
channel coding
precoding
broadcast channel
期刊
IF:
10.7
论文数:
1.3W
被引数:
5.3W
机构
引用论文
分享收藏Incorporating a Sorghum Habitat for Enhancing Lady Beetles (Coleoptera: Coccinellidae) in Cotton
OAAI
OAAI分享收藏Ritual Territories as Local Heritage? Discourse on Disruptions in Society and Nature in Maane, Burkina Faso.png)
Africa
AfricaIF0
PREAI
分享收藏
查看更多内容