Terence Chan
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View article: Heterogeneity Shifts the Storage-Computation Tradeoff in Secure Multi-Cloud Systems
Heterogeneity Shifts the Storage-Computation Tradeoff in Secure Multi-Cloud Systems Open
This paper considers the design of heterogeneous multi-cloud systems for big data storage and computing in the presence of cloud collusion and failures. A fundamental concept of such a system is the secrecy capacity, which represents the m…
View article: On a new class of continuous indices of inequality
On a new class of continuous indices of inequality Open
The Gini index is a well-known and long-established measure of inequality for distributions of income and other quantities. However, it has a number of mathematical disadvantages. Firstly, it is discontinuous with respect to all the main m…
View article: Enhanced data‐aided frequency estimation by collaboration in a distributed receiver
Enhanced data‐aided frequency estimation by collaboration in a distributed receiver Open
In this paper, a communication system with digital burst‐mode transmission and distributed reception in the presence of carrier frequency offset and Additive White Gaussian Noise (AWGN) is considered. The distributed receiver consists of d…
View article: Iterative Joint Parameters Estimation and Decoding in a Distributed Receiver for Satellite Applications and Relevant Cramer-Rao Bounds
Iterative Joint Parameters Estimation and Decoding in a Distributed Receiver for Satellite Applications and Relevant Cramer-Rao Bounds Open
This paper presents an algorithm for iterative joint channel parameter (carrier phase, Doppler shift and Doppler rate) estimation and decoding of transmission over channels affected by Doppler shift and Doppler rate using a distributed rec…
View article: Serial and Parallel Convolutional Neural Network Designs for NFDM Signals
Serial and Parallel Convolutional Neural Network Designs for NFDM Signals Open
Two conceptual convolutional neural network designs are proposed for directly decoding NFDM signals with the consideration of hardware implementation. A serial network is designed for small network size suitable for small user applications…
View article: Direct decoding of nonlinear OFDM-QAM signals using convolutional neural network
Direct decoding of nonlinear OFDM-QAM signals using convolutional neural network Open
Nonlinear Fourier transform, as a technique that has a great potential to overcome the capacity limit in fibre optical communication system, faces speed and accuracy bottlenecks in practice. Machine learning using convolutional neural netw…
View article: Characterisation of conditional independence structures for polymatroids using vanishing sets
Characterisation of conditional independence structures for polymatroids using vanishing sets Open
In this paper, we characterise and classify a list of full conditional independences via the structure of the induced set of vanishing atoms.Construction of Markov random subfield and minimal characterisation of polymatroids satisfying a M…
View article: Investigating Multiple Household Water Sources and Uses with a Computer-Assisted Personal Interviewing (CAPI) Survey
Investigating Multiple Household Water Sources and Uses with a Computer-Assisted Personal Interviewing (CAPI) Survey Open
The investigation of multiple sources in household water management is considered overly complicated and time consuming using paper and pen interviewing (PAPI). We assess the advantages of computer-assisted personal interviewing (CAPI) in …
View article: Temporal and thematic trends in water, sanitation and hygiene (WaSH) research in Pacific Island Countries: a systematic review
Temporal and thematic trends in water, sanitation and hygiene (WaSH) research in Pacific Island Countries: a systematic review Open
Pacific Island Countries (PICs) lag behind global trends in water, sanitation and hygiene (WaSH) development. We conducted a systematic search of all English language papers (published before February 2015) about WaSH in PICs to evaluate t…
View article: Linear programming bounds for distributed storage codes
Linear programming bounds for distributed storage codes Open
A major issue of locally repairable codes is their robustness. If a local repair group is not able to perform the repair process, this will result in increasing the repair cost. Therefore, it is critical for a locally repairable code to ha…
View article: Multi-Rack Distributed Data Storage Networks
Multi-Rack Distributed Data Storage Networks Open
The majority of works in distributed storage networks assume a simple network model with a collection of identical storage nodes with the same communication cost between the nodes. In this paper, we consider a realistic multi-rack distribu…
View article: Correlated Eigenvalues Optical Communications
Correlated Eigenvalues Optical Communications Open
There is a fundamental limit on the capacity of fibre optical communication system (Shannon Limit). This limit can be potentially overcome via using Nonlinear Frequency Division Multiplexing. Dealing with noises in these systems is one of …
View article: Capacity of Wireless Distributed Storage Systems with Broadcast Repair
Capacity of Wireless Distributed Storage Systems with Broadcast Repair Open
In wireless distributed storage systems, storage nodes are connected by wireless channels, which are broadcast in nature. This paper exploits this unique feature to design an efficient repair mechanism, called broadcast repair, for wireles…
View article: A minimal set of shannon-type inequalities for functional dependence structures
A minimal set of shannon-type inequalities for functional dependence structures Open
The minimal set of Shannon-type inequalities (referred to as elemental inequalities), plays a central role in determining whether a given inequality is Shannon-type. Often, there arises a situation where one needs to check whether a given …
View article: Noise Models in the Nonlinear Spectral Domain for Optical Fibre Communications
Noise Models in the Nonlinear Spectral Domain for Optical Fibre Communications Open
Existing works on building a soliton transmission system only encode information using the imaginary part of the eigenvalue, which fails to make full use of the signal degree-of-freedoms. Motivated by this observation, we make the first st…
View article: Alternative Decoding Methods for Optical Communications Based on Nonlinear Fourier Transform
Alternative Decoding Methods for Optical Communications Based on Nonlinear Fourier Transform Open
Long-haul optical communications based on nonlinear Fourier Transform have gained attention recently as a new communication strategy that inherently embrace the nonlinear nature of the optical fiber. For communications using discrete eigen…
View article: Entropy Bounds for Conjunctive Queries with Functional Dependencies
Entropy Bounds for Conjunctive Queries with Functional Dependencies Open
We study the problem of finding the worst-case size of the result Q(D) of a fixed conjunctive query Q applied to a database D satisfying given functional dependencies. We provide a characterization of this bound in terms of entropy vectors…
View article: Capacity Bounds for Networks with Correlated Sources and Characterisation of Distributions by Entropies
Capacity Bounds for Networks with Correlated Sources and Characterisation of Distributions by Entropies Open
Characterising the capacity region for a network can be extremely difficult. Even with independent sources, determining the capacity region can be as hard as the open problem of characterising all information inequalities. The majority of …
View article: Capacity Bounds for Networks with Correlated Sources and\n Characterisation of Distributions by Entropies
Capacity Bounds for Networks with Correlated Sources and\n Characterisation of Distributions by Entropies Open
Characterising the capacity region for a network can be extremely difficult.\nEven with independent sources, determining the capacity region can be as hard\nas the open problem of characterising all information inequalities. The\nmajority …
View article: Broadcast Repair for Wireless Distributed Storage Systems
Broadcast Repair for Wireless Distributed Storage Systems Open
In wireless distributed storage systems, storage nodes are connected by wireless channels, which are broadcast in nature. This paper exploits this unique feature to design an efficient repair mechanism, called broadcast repair, for wireles…
View article: Characterising Probability Distributions via Entropies
Characterising Probability Distributions via Entropies Open
Characterising the capacity region for a network can be extremely difficult, especially when the sources are dependent. Most existing computable outer bounds are relaxations of the Linear Programming bound. One main challenge to extend lin…
View article: Study of noise impact on nonlinear frequency division multiplexing
Study of noise impact on nonlinear frequency division multiplexing Open
In this work, how the noise contaminates signals propagating in an optical fibre is discussed in the nonlinear spectral domain after applying the nonlinear Fourier transform. Simulation results about how the soliton parameters in the nonli…