16 citations · 23 across the 10 of their papers we have counts for
10 papers
Precise Analysis of Covariance Identifiability for Activity Detection in Grant-Free Random Access
Shengsong Luo, Junjie Ma, Chongbin Xu +1
We consider the identifiability issue of maximum likelihood based activity detection in massive MIMO based grant-free random access. A prior work by Chen et al. indicates that the…
Receiver Design for MIMO Unsourced Random Access with SKP Coding
Zeyu Han, Xiaojun Yuan, Chongbin Xu +1
In this letter, we extend the sparse Kronecker-product (SKP) coding scheme, originally designed for the additive white Gaussian noise (AWGN) channel, to multiple input multiple out…
Sparse Kronecker-Product Coding for Unsourced Multiple Access
Zeyu Han, Xiaojun Yuan, Chongbin Xu +2
In this paper, a sparse Kronecker-product (SKP) coding scheme is proposed for unsourced multiple access. Specifically, the data of each active user is encoded as the Kronecker prod…
Regularized Recovery by Multi-order Partial Hypergraph Total Variation
Ruyuan Qu, Jiaqi He, Hui Feng +2
Capturing complex high-order interactions among data is an important task in many scenarios. A common way to model high-order interactions is to use hypergraphs whose topology can…
An Entropy-based Proof of Threshold Saturation for Nonbinary SC-LDPC Ensembles on the BEC
Zhonghao Zhang, Mengnan Xu, Chongbin Xu +2
In this paper we are concerned with the asymptotic analysis of nonbinary spatially-coupled low-density parity-check (SC-LDPC) ensembles defined over GL (the gen…
Joint User Identification, Channel Estimation, and Signal Detection for Grant-Free NOMA
Shuchao Jiang, Xiaojun Yuan, Xin Wang +2
For massive machine-type communications, centralized control may incur a prohibitively high overhead. Grant-free non-orthogonal multiple access (NOMA) provides possible solutions,…
Gridless Variational Bayesian Channel Estimation for Antenna Array Systems with Low Resolution ADCs
Jiang Zhu, Chao-kai Wen, Jun Tong +2
Employing low-resolution analog-to-digital converters (ADCs) coupled with large antenna arrays at the receivers has drawn considerable interests in the millimeter wave (mm-wave) sy…
Distributed Coordinated Multicell Beamforming for Wireless Cellular Networks Powered by Renewables: A Stochastic ADMM Approach
Shuyan Hu, Chongbin Xu, Xin Wang +2
The integration of renewable energy sources (RES) has facilitated efficient and sustainable resource allocation for wireless communication systems. In this paper, a novel framework…
REEL-BF Design: Achieving the SDP Bound for Downlink Beamforming with Arbitrary Shaping Constraints
Feng Wang, Chongbin Xu, Yongwei Huang +2
This paper considers the beamforming design for a multiuser multiple-input single-output (MISO) downlink with an arbitrary number of (context-specific) shaping constraints. In this…
Achievable Rates of MIMO Systems with Linear Precoding and Iterative LMMSE Detection
Xiaojun Yuan, Li Ping, Chongbin Xu +1
We establish area theorems for iterative detection over coded linear systems (including multiple-input multipleoutput (MIMO) channels, inter-symbol-interference (ISI) channels, and…