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Much of the traffic that traverses the Internet each day is redundant. That is, some or all of the data content has been sent previously. From a technical viewpoint, this represents a waste of resources, in terms of network bandwidth, storage, and energy efficiency. This paper presents an initial feasibility study to assess the potential of data deduplication technologies to reduce Internet traffic...
This paper introduces a 2-D index map coding of the palette mode in screen content coding extension of the High-Efficiency Video Coding (HEVC SCC) standard to further improve the compression performance. In contrast to the current 1-D search using RUN to represent the length of matched string, we bring the block width and height to describe the arbitrary rectangle shape. We also use the block vector...
In this paper 1 we discuss the design issues of an Ultra Wide Band (UWB) receiver, targeting a single-chip CMOS implementation for low data-rate applications like ad hoc wireless sensor networks. A non-coherent transmitted-reference (TR) receiver is chosen because of its small complexity compared to other architectures. Issues, challenges and possible design solutions are discussed. In particular,...
A 3rd-order 3-bit continuous-time delta-sigma modulator incorporating several techniques for performance enhancement is presented. In the quantizer, a proposed 3-bit two-step time-domain quantizer is used to facilitate lower power consumption and smaller chip area. In the loop filter, a single-opamp-biquad technique is adopted to realize a 3rd-order loop filter to reduce the modulator power consumption...
This paper studies the problem of joint allocation of transmission power and bandwidth in cooperative networks. The goal is to minimize transmission energy consumption in a network with M coordinated transmission points (CTPs) under respective data rate constraints of N mobile terminals (MTs). We propose a joint power and bandwidth allocation scheme for downlink data transmission based on mathematical...
This paper proposes an efficient bank of filters derived from variable bandwidth filter structure, for audiogram matching in a digital hearing aid. The variable bandwidth filter is designed using Farrow structure, for lower hardware complexity. The magnitude and band edge frequencies of the filters are independently adjustable which allows this arrangement to successfully fit a given audiogram with...
A lot of effort has been devoted to the design of uniform and non-uniform filter banks for hearing aid applications. But in most of the cases, it never deals with large variation of hearing losses at mid frequencies. This paper presents a low complex design of a non-uniformly spaced digital finite impulse response (FIR) filter bank for digital hearing aid application. Frequency response masking (FRM)...
Wide area research and education networks, such as ESnet and Internet2 in the US and GEANT in Europe, have recently deployed software that makes possible to reserve bandwidth in the form of dynamic circuits. Such circuits offer guaranteed QoS to specific data flows, significantly increasing the reliability and predictability of data transfers. In this paper, we study the problem of constructing routes...
The major drawback of OFDM is the high PAPR which in results, increases the complexity of Analog to Digital (A/D) and Digital to Analog (D/A) converters and also reduces the efficiency of RF High Power Amplifier (HPA). High PAPR values can also lead to serious problems such as severe power penalty at the transmitter, which is not affordable in portable wireless systems where terminals are powered...
The increasing demand for video content and the fast adoption of HTTP Adaptive Streaming (HAS) has led to the need for sophisticated streaming optimization solutions. One of the main drawbacks of HAS is that the user is responsible for deciding which video quality to request without taking into account the server load, the number of users, fairness and more. Therefore, traffic shaping server, which...
Machine-to-Machine (M2M) communications is considered to be one of the key enablers for the provisioning of advanced applications and services such as smart cities and hospitals, as well as automated vehicular and industrial automation operation. Currently, in LTE-Advanced systems, the main focus has been on supporting massive deployment of low cost devices, with enhanced radio access network coverage...
Algebraic Multigrid (AMG) is a linear solver, well known for its linear computational complexity and excellent parallelization scalability. As a result, AMG is expected to be a solver of choice for emerging extreme scale systems capable of delivering hundred Pflops and beyond. While node level performance of AMG is generally limited by memory bandwidth, achieving high bandwidth efficiency is challenging...
In a multitenant data center, nodes and links of tenants' virtual networks (VNs) share a single component of the physical substrate network (SN). A failure of the single SN component can thereby cause simultaneous failures of multiple nodes and links in a VN, this complex of failures must significantly disrupt the services offered on the VN. In the present paper, we clarify how the fault tolerance...
In this paper, we present a novel cooperative resource management mechanism in mobile cloud computing environment. This mechanism is based on cooperation between mobile devices using their short range radio technology such as WiFi with the goal of maximizing the revenue of the cellular service provider. Users with poor cellular link quality connect with nearby devices through their WiFi interface...
The virtual network embedding (VNE) problem is known to be NP-hard, and as a result, several heuristic approaches have been proposed to solve it. These heuristics find sub-optimal solutions in polynomial time, but have practical limitations, low acceptance rates, and high embedding costs. In this paper, we first propose two heuristics that exploit the constraint propagation properties of the VNE problem...
This paper presents a low complex design of a non-uniformly spaced digital finite impulse response (FIR) filter bank for digital hearing aid application. Frequency response masking (FRM) technique is used for the implementation of 10 non-uniformly spaced subband filters. FRM technique ensure the drastic reduction in the number of multipliers and adders in linear phase FIR filter. It employs two half-band...
In this paper, an analysis of Multi-prototype based filter bank design over Single prototype based design for non uniform signal decomposition is done. The Multi-prototype based method reduces the number of channel combiners and residual errors when compared to Single prototype based channel combination technique. In both methods, the prototype filters with different pass-bands are optimized to have...
This paper proposes novel DIF and DIT, FFT algorithms that utilizes data sparsity information to acheive sub-optimal computational complexity over traditional radix-2 FFT. Using the sparsity information, a map of the relavant nodes that would contribute to the FFT sum is first derived. Then the second part of the algorithm traverses this map and performs computation. This paper also provides the analysis...
We present the construction of a new family of erasure correcting codes for distributed storage that yield low repair bandwidth and low repair complexity. The construction is based on two classes of parity symbols. The primary goal of the first class of symbols is to provide good fault tolerance, while the second class facilitates node repair, reducing the repair bandwidth and the repair complexity...
In this paper, we consider communication over the bandwidth limited analog white Gaussian noise channel using non-orthogonal pulses. In particular, we consider non-orthogonal transmission by signaling samples at a rate higher than the Nyquist rate. Using the faster-than- Nyquist (FTN) framework, Mazo showed that one may transmit symbols carried by sinc pulses at a higher rate than that dictated by...
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