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A Wireless Sensor Network (WSN) is a system comprising of spatially dispersed self-sufficient gadgets by utilizing sensors to agreeably screen a portion of the conditions. Data that are used in WSN are used in decision making in critical infrastructure. An additional node is introduced in network which is known as malicious node to compromise the existing ones, so for the perfect decision making data...
Recent experiments have demonstrated the ability of neuroscientists to gain direct access to neural signals in real time, and decode the resulting information to control various prosthetic devices. This — along with deep brain stimulation for Parkinson's disease and a variety of other conditions — extrapolates to a premise that widespread "brain interface" medical device technologies are...
For overcoming the scarcity of frequency resources, spectrum efficiency should be always enhanced by adopting the novel transmission methods. Nowadays, there are a few brilliant transmission technique in academic investigation area such as interference alignment, multi-cell beamforming and cooperative communication. Interference alignment has received the spotlight to enormously enhance the spectral...
Multichannel elctrocardiogram (MECG) signals are correlated both in spatial domain as well as in temporal domain and this correlation is stronger at multiscale levels (Fig. 1). To exploit this correlation in compressed sensing (CS) based ECG tele-monitoring systems, a joint multiscale compressed sensing (JMCS) technique is proposed in this work. CS is a novel signal acquisition/reconstruction paradigm...
In this paper, we propose an improved design of expanding window fountain (EWF) codes over the binary input additive white Gaussian noise (BIAWGN) channels. The encoding process is modified to get almost regular variable node degree distributions. Compared with the conventional EWF codes, our proposed scheme can lower the error floor. Furthermore, we combine the EWF encoding process with unequal power...
The design of artificial-noise-aided secure transmission over multiple-input, single-output, and multi-antenna eavesdropper (MISOME) slow fading channels is addressed in this paper. We consider the scenario where the messages sent by N-antenna transmitter are overheard by a K-antenna eavesdropper. The instantaneous channel state information of the eavesdropper's channel is assumed to be unknown to...
The centrality of interleavers in interleave-division multiple-access (IDMA) cannot be over-emphasised, the interleaver being the only means of isolating signals for different users of the multiple-access system. This work gives a critical review of bit-error-rate (BER) performance of interleavers and IDMA systems. Existing literature shows that there are disagreements among results published by different...
With the growing popularity of mobile applications such as voice over IP (VoIP) and real-time conversational video, and due to the scarcity of the available radio spectrum, increasing the spectral efficiency of wireless systems under quality of service (QoS) constraints becomes increasingly important. Accordingly, in this paper we investigate the maximum achievable rate of incremental redundancy type...
This paper presents a new innovation network architecture for the analytical model by the integration which challenges both fountain code and Markov chain modeling to improve the throughput performance for ideal channel conditions. In this context, the collision result in corrupted packets and the following MAC layer retransmissions consume extra energy. Channel contention is a serious problem in...
This work presents an area efficient half row partially parallel pipelined LDPC decoder architecture for IEEE 802.11ad standard. It provides better area and throughput tradeoff by overcoming the low throughput bottleneck in conventional half row decoders and high complexity bottleneck in fully parallel decoders. The proposed architecture is implemented using 40-nm CMOS technology. The proposed half-row...
In this paper, we study simultaneous wireless information and power transfer (SWIPT) in a multi- user interference single-input single-output (SISO) system. We first solve the ergodic rate optimization problem theoretically and derive the PS scheme and the TS scheme to obtain the optimal strategy of getting maximum ergodic capacity while harvesting sufficient energy to ensure receiver circuit working...
In a multichannel system, the transmitter can perform precoding techniques to alleviate the effects of fading and interference. However, the precoding transformation matrix usually results in high peak to average power ratio (PAPR). In order to avoid inefficiently operating the power amplifier, for a precoded multi-input multi-output (MIMO) system, we consider using a PAPR reduction method based on...
Buffer-aided network coding (NC) has been proposed as an effective method to improve retransmission efficiency. In this way, the correctly received undecodable NC combined retransmission packets are waited in the buffer for a future network decoding opportunity rather than delete. However, existing buffer-aided approaches fail to consider the buffer status and the latest feedback in the next round...
One of the most calculation intensive operations for a 100 Gbps wireless packet processing is a forward error correction (FEC). We are using standard field programmable gate arrays (FPGAs) to prepare a data link layer demonstrator. Therefore, we need to find a high-parallelized FEC structure for our device. The difficulty is to design the 100 Gbps FEC engine that can be realized in an FPGA. In one...
The increasing data rates expected to be of the order of Gb/s for future wireless systems directly impact the throughput requirements of the modulation and coding systems of the physical layer. In an effort to design a suitable channel coding solution for 5G wireless systems, in this brief we present two approaches to improve the throughput of a Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) decoder...
Although Random Linear Network Coding (RLNC) has been shown to reduce the number of transmissions for multi-cast scenarios, there is an inherent signaling overhead to achieve this benefit. Employing a large field result in less transmissions but at the cost of a large coding vector of coefficients. Conversely, a smaller field fewer bits to represent the coding coefficients, but has the drawback of...
We present optimization algorithm for relay (RLY) selection and, source (SRC) and RLY power allocations in a cooperative multicast millimeter-wave (mmWave) system with non-line-of-sight (non-LoS) sensing. We show that there is a significant benefit to the system outage performance by allocating powers for the SRC and the RLYs selected from the candidates availing of line-of-sight (LoS) paths. Specifically,...
In spite of recent progress of the wireless communication technology, the high bit error rate always restrains its better transmission efficiency. Especially, the errors in protocol header would incur the discard of valid information in the check-failure packets. In order to improve the utilization of transmitted data, an iterative header recovery scheme between two associated layers is proposed in...
In this paper, simultaneous wireless information and power transfer (SWIPT) concept is introduced for multi group multicast beamforming. Each user has a single antenna and a power splitter which divides the radio frequency (RF) signal into two for both information decoding and energy harvesting. The aim is to minimize the total transmission power at the base station while satisfying both signal-to-interference-plus-noise-ratio...
This paper describes the design techniques of a segmented current steering (CS) digital-to-analog converter (DAC)with optimum sizing of the current sources. The DAC has been designed in 0.18 μm CMOS n-well technology provided by National Semiconductor. The 10-bit DAC is segmented as 5+5, where the 5-LSB bits are implemented in binary and the 5-MSB bits are implemented in unary architecture...
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