51 citations · 286 across the 36 of their papers we have counts for
38 papers
Enhancing Signal Space Diversity for SCMA Over Rayleigh Fading Channels
Qu Luo, Zilong Liu, Gaojie Chen +1
Sparse code multiple access (SCMA) is a promising technique for the enabling of massive connectivity in future machine-type communication networks, but it suffers from a limited di…
Root Cross Z-Complementary Pairs with Large ZCZ Width
Shibsankar Das, Adrish Banerjee, Zilong Liu
In this paper, we present a new family of cross -complementary pairs (CZCPs) based on generalized Boolean functions and two roots of unity. Our key idea is to consider an arbitr…
Sparse Complementary Pairs with Additional Aperiodic ZCZ Property
Cheng-Yu Pai, Zilong Liu, Chunlei Li +1
This paper presents a novel class of complex-valued sparse complementary pairs (SCPs), each consisting of a number of zero values and with additional zero-correlation zone (ZCZ) pr…
Two-Dimensional Golay Complementary Array Sets With Arbitrary Lengths for Omnidirectional MIMO Transmission
You-Qi Zhao, Cheng-Yu Pai, Zhen-Ming Huang +2
This paper presents a coding approach for achieving omnidirectional transmission of certain common signals in massive multi-input multi-output (MIMO) networks such that the receive…
OTFS-SCMA: A Downlink NOMA Scheme for Massive Connectivity in High Mobility Channels
Haifeng Wen, Weijie Yuan, Zilong Liu +1
This paper studies a downlink system that combines orthogonal-time-frequency-space (OTFS) modulation and sparse code multiple access (SCMA) to support massive connectivity in high-…
A Design of Low-Projection SCMA Codebooks for Ultra-Low Decoding Complexity in Downlink IoT Networks
Qu Luo, Zilong Liu, Gaojie Chen +3
This paper conceives a novel sparse code multiple access (SCMA) codebook design which is motivated by the strong need for providing ultra-low decoding complexity and good error per…
Jamming Modulation: An Active Anti-Jamming Scheme
Jianhui Ma, Qiang Li, Zilong Liu +3
Providing quality communications under adversarial electronic attacks, e.g., broadband jamming attacks, is a challenging task. Unlike state-of-the-art approaches which treat jammin…
Low-Complexity Block Coordinate Descend Based Multiuser Detection for Uplink Grant-Free NOMA
Pengyu Gao, Zilong Liu, Pei Xiao +2
Grant-free non-orthogonal multiple access (NOMA) scheme is considered as a promising candidate for the enabling of massive connectivity and reduced signalling overhead for Internet…
A Novel K-Repetition Design for SCMA
Ke Lai, Zilong Liu, Jing Lei +3
This work presents a novel K-Repetition based HARQ scheme for LDPC coded uplink SCMA by employing a network coding (NC) principle to encode different packets, where K-Repetition is…
New Correlation Bound and Construction of Quasi-Complementary Code Sets
Palash Sarkar, Chunlei Li, Sudhan Majhi +1
Quasi-complementary sequence sets (QCSSs) have attracted sustained research interests for simultaneously supporting more active users in multi-carrier code-division multiple-access…
An Improved EPA based Receiver Design for Uplink LDPC Coded SCMA System
Lingyun Chai, Zilong Liu, Pei Xiao +2
Sparse code multiple access (SCMA) is an emerging paradigm for efficient enabling of massive connectivity in future machine-type communications (MTC). In this letter, we conceive t…
Low-Complexity Codebook Design for SCMA based Visible Light Communication
Saumya Chaturvedi, Dil Nashin Anwar, Vivek Ashok Bohara +2
Sparse code multiple access (SCMA), as a code-domain non-orthogonal multiple access (NOMA) scheme, has received considerable research attention for enabling massive connectivity in…
Designing Enhanced Multi-dimensional Constellations for Code-Domain NOMA
Haifeng Wen, Zilong Liu, Qu Luo +2
This paper presents an enhanced design of multi-dimensional (MD) constellations which play a pivotal role in many communication systems such as code-domain non-orthogonal multiple…
Designing Two-Dimensional Complete Complementary Codes for Omnidirectional Transmission in Massive MIMO Systems
Cheng-Yu Pai, Zilong Liu, You-Qi Zhao +2
This paper presents an efficient construction of two-dimensional (2D) complete complementary codes (CCCs) for their modern application as omnidirectional precoding matrices in mass…
A Tutorial to Sparse Code Multiple Access
Saumya Chaturvedi, Zilong Liu, Vivek Ashok Bohara +2
Sparse Code Multiple Access (SCMA) is an enabling code-domain non-orthogonal multiple access (NOMA)scheme for massive connectivity and ultra low-latency in future machine-type comm…
Pseudo-Boolean Functions for Optimal Z-Complementary Code Sets with Flexible Lengths
Palash Sarkar, Sudhan Majhi, Zilong Liu
This paper aims to construct optimal Z-complementary code set (ZCCS) with non-power-of-two (NPT) lengths to enable interference-free multicarrier code-division multiple access (MC-…
Sparse Code Multiple Access for 6G Wireless Communication Networks: Recent Advances and Future Directions
Lisu Yu, Zilong Liu, Miaowen Wen +4
As 5G networks rolling out in many different countries nowadays, the time has come to investigate how to upgrade and expand them towards 6G, where the latter is expected to realize…
Reinforcement Learning Random Access for Delay-Constrained Heterogeneous Wireless Networks: A Two-User Case
Danzhou Wu, Lei Deng, Zilong Liu +2
In this paper, we investigate the random access problem for a delay-constrained heterogeneous wireless network. As a first attempt to study this new problem, we consider a network…
Construction of Complete Complementary Codes over Small Alphabet
Palash Sarkar, Chunlei Li, Sudhan Majhi +1
Complete complementary codes (CCCs) play a vital role not only in wireless communication, particularly in multicarrier systems where achieving an interference-free environment is o…
Perturbed Adaptive Belief Propagation Decoding for High-Density Parity-Check Codes
Li Deng, Zilong Liu, Yong Liang Guan +4
Algebraic codes such as BCH code are receiving renewed interest as their short block lengths and low/no error floors make them attractive for ultra-reliable low-latency communicati…
6G for Vehicle-to-Everything (V2X) Communications: Enabling Technologies, Challenges, and Opportunities
Md. Noor-A-Rahim, Zilong Liu, Haeyoung Lee +6
We are on the cusp of a new era of connected autonomous vehicles with unprecedented user experiences, tremendously improved road safety and air quality, highly diverse transportati…
Enhanced User Grouping and Power Allocation for Hybrid mmWave MIMO-NOMA systems
Jinle Zhu, Qiang Li, Zilong Liu +2
Non-orthogonal multiple access (NOMA) and millimeter wave (mmWave) are two key enabling technologies for the fifth-generation (5G) mobile networks and beyond. In this paper, we con…
Design of Power-Imbalanced SCMA Codebook
Xudong Li, Zhicheng Gao, Yiming Gui +3
Sparse code multiple access (SCMA) is a promising multiuser communication technique for the enabling of future massive machine-type networks. Unlike existing codebook design scheme…
Sparse or Dense: A Comparative Study of Code-Domain NOMA Systems
Zilong Liu, Lie-Liang Yang
This paper is focused on code-domain non-orthogonal multiple access (CD-NOMA), which is an emerging paradigm to support massive connectivity for future machine-type wireless networ…