Soon Xin Ng

Technical Report OFDM-Assisted Simultaneous Quantum and Classical THz Communications

Xin Liu, Chao Xu, Soon Xin Ng, Mohammed El‐Hajjar et autres

The feasibility of cost-effective simultaneous quantum and classical communication (SQCC) transmitting both the quantum key and classical information via a superimposed coherent state is investigated both in optical and Terahertz (THz) bands. Since the existing THz SQCC schemes assume single-carrier (SC) transmission …

Rate-Compatible Polar- and LDPC-Coded Hybrid ARQ Aided Reverse Reconciliation in CV-QKD

Dingzhao Wang, Xin Liu, Chao Xu, Soon Xin Ng et autres

Continuous-variable quantum key distribution (CV-QKD) systems face challenges in maintaining efficient reconciliation over long distances due to the time variant signal-to-noise ratio (SNR) imposed by channel quality fluctuations. Hence fixed-rate error-correction schemes using low-density parity-check (LDPC) or Polar codes lead to high …

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Dataset for "Short-block polar coding based CV-QKD reconciliation"

Dingzhao Wang, Lajos Hanzo, Soon Xin Ng, Chao Xu et autres

Simulation result figures (EPS format) for rate-compatible polar-coded hybrid ARQ aided simultaneous quantum and classical THz communication over Rician fading channels. This dataset supports Chapter 5 of the thesis and the associated journal paper submitted to IEEE Communications Letters.

Near-Field Low-Complexity Sensing for Reconfigurable Holographic Surfaces With Hardware Constraints

Y. F. Dong, Qingchao Li, Soon Xin Ng, Mohammed El‐Hajjar

Reconfigurable holographic surfaces (RHS) have emerged as a promising enablers for Integrated Sensing and Communication (ISAC) owing to their ultra-dense electromagnetic control capability. In this work, we consider near-field multi-user localization as a key ISAC function. However, hardware-induced phase-shift constraints and complex-plane …

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Joint Beamforming and User Grouping for FDA-MIMO Assisted Integrated Sensing and Communication

Ruihao Yuan, Soon Xin Ng, Mohammed El‐Hajjar

Integrated sensing and communication (ISAC) enables the joint realization of environmental sensing and multiuser communications using shared hardware and spectrum resources. Among emerging ISAC architectures, frequency diverse array multiple-input multiple-output (FDA-MIMO) systems offer unique range–angle dependent beamforming capabilities that significantly enhance user …

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A Framework for Stacked Intelligent Metasurfaces With Geometry Design for Near-Field Communications

Y. F. Dong, Soon Xin Ng, Mohammed El‐Hajjar

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Tetherless THz CV-QKD – Would It Work?

X. Liu, Nan Wang, Chao Xu, Soon Xin Ng et autres

Quantum key distribution (QKD) provides information-theoretic security by leveraging quantum mechanical principles, while Terahertz (THz) communications offer unprecedented data rates for next-generation networks. We sketch out an evolutionary pathway for bridging these domains by critically appraising THz-based continuous-variable QKD (CV-QKD) systems conceived …

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From Classical to Quantum Coding

Zunaira Babar, Daryus Chandra, Soon Xin Ng, Lajos Hanzo

Quantum Low‐density Parity Check Codes

Zunaira Babar, Daryus Chandra, Soon Xin Ng, Lajos Hanzo

The design of quantum low-density parity check (QLDPC) codes is discussed, with a special emphasis on their structural properties and iterative decoding techniques. We review diverse QLDPC code construction methods, including Calderbank–Shor–Steane (CSS), non-CSS, and entanglement-assisted variants. The chapter highlights the associated …

EXIT‐chart Aided Near‐hashing‐bound Concatenated Quantum Codes

Zunaira Babar, Daryus Chandra, Soon Xin Ng, Lajos Hanzo

A suite of concatenated quantum error correction codes is designed for closely approaching the quantum Hashing bound. We begin with the design objectives to be met in the face of quantum depolarizing channels, characterizing the achievable capacity region as a function of …

Quantum Topological Error Correction Codes: The Classical‐to‐quantum Isomorphism Perspective

Zunaira Babar, Daryus Chandra, Soon Xin Ng, Lajos Hanzo

In this chapter, we explore the family of quantum topological error correction codes (QTECCs) by developing their foundations from those of classical lattice-based error correction codes. The classical construction of topological codes using square and triangular lattices is first introduced, showing their …

Near‐capacity Codes for Entanglement‐aided Classical Communication

Zunaira Babar, Daryus Chandra, Soon Xin Ng, Lajos Hanzo

Near-capacity classical code designs are proposed for entanglement-assisted communication over quantum depolarizing channels. We introduce the superdense coding (SD) protocol as a bit-to-qubit mapping mechanism and characterize the associated classical capacity. The chapter describes a bit-based transmission scheme that serially concatenates an …