51 citations · 286 across the 36 of their papers we have counts for
34 papers · 1 filter
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…
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-…
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…
How to Construct Mutually Orthogonal Complementary Sets with Non-Power-of-Two Lengths?
Shing-Wei Wu, Chao-Yu Chen, Zilong Liu
Mutually orthogonal complementary sets (MOCSs) have received significant research attention in recent years due to their wide applications in communications and radar. Existing MOC…
Low-PMEPR Preamble Sequence Design for Dynamic Spectrum Allocation in OFDMA Systems
Yajing Zhou, Zhengchun Zhou, Zilong Liu +2
Orthogonal Frequency Division Multiple Access (OFDMA) with Dynamic spectrum allocation (DSA) is able to provide a wide range of data rate requirements. This paper is focused on the…
Optimal Z-complementary Code Set From Generalized Reed-Muller Codes
Palash Sarkar, Sudhan Majhi, Zilong Liu
Z-complementary code set (ZCCS), an extension of perfect complementary codes (CCs), refers to a set of two-dimensional matrices having zero correlation zone properties. ZCCS can be…