Analysis of GSM-SM Over $$kappa -mu$$ κ - μ , $$eta -mu$$ η - μ and $$alpha -mu$$ α - μ Fading Channels

Wireless Personal Communications - Spatial multiplexing increases the throughput by sending multiple data bits parallelly while generalized spatial modulation (GSM) increases the spectral...     

Error Probability and Throughput Analysis of IRS-Assisted Wireless System Over Generalized $$\kappa$$ κ – $$\mu$$ μ Fading Channels

Wireless Personal Communications - Intelligent reflecting surfaces (IRS)-assisted wireless transmission has recently emerged as a potential candidate to enable a smart and reconfigurable radio...     

Outage Probability Analysis of Multi-relay Cooperative Decode-and-Forward System Over Generalized η–μ and κ–μ Fading Channels

In present scenario of wireless sensor networks and communications, efficient sensed data transmission among nodes is being a great confrontation because of the impulsive and volatile nature of sensors in the network. For providing that and enhancing network lifetime, there are several approaches are developed, specifically using clustering techniques. Still, there are requirements for energy based efficient routing in WSN. With that note, this paper develops anEnergy Aware Efficient Data Aggregation (EAEDAR) and Data Re-Schedulingwith the incorporation of clustering techniques. Moreover, the model used energy based cluster formation and cluster head selection for increasing the network stability and data delivery rate. The model comprises four main phases, namely, Energy factor based cluster formation, Aggregator_SN (Sensor Node) Selection, Efficient Data Aggregation (EDA) and Data Re-Scheduling based on delay and processing time. Furthermore, the model is updated with respect to the status of the nodes and links, for providing consistent network with improved reliable data transmissions. The simulation results portrays the effectiveness of the proposed model over other compared works in terms of the performance factors such as, throughput, packet delivery ratio, network lifetime, transmission delay and packet drop.

     

Statistical Properties for the Envelope and Phase of the α ? η ? μ Generalized Fading Channels

In this paper, a study on the statistical properties for the envelope and phase of both formats of the ?? ? ?? ? ?? generalized fading channels is provided by deriving novel closed-form expressions. Specifically, a simple and closed-form expression for the phase crossing rate of the ?? ? ?? ? ?? generalized fading channels is obtained. Moreover, exact analytical expressions for the level crossing rate and the average duration of fades, as well as the PDF of random FM noise are presented. Confirmation of the provided analytical formulations is attained by reducing the general model to some widely known special cases (Nakagami-m, Hoyt, and Rayleigh). Extra validation is performed by means of a sample of numerical results obtained by Monte Carlo simulation.     

A Comprehensive Framework for Performance Analysis of Dual?Hop Cooperative Wireless Systems with Fixed?Gain Relays over Generalized Fading Channels

In the present contribution, we propose a comprehensive framework for the analysis of cooperative dual-hop wireless systems over generalized fading channels, which use an amplify and forward (AF) relaying mechanism with blind and semi-blind relays. In particular, the proposed framework provides either exact results or very accurate bounds for computing the moment generating function (MGF) of the end-to-end signal-to-noise ratio (SNR) for various fading channel models typically encountered in real propagation environments. Furthermore, with the help of the MGF-based approach for performance analysis of wireless systems over fading channels, we will show that important performance indexes can be easily derived from the MGF. With respect to previous published articles on the matter, the main contribution of the paper is twofold: i) by relying on the properties of the Meijer-G function, either exact expressions or accurate bounds for the MGF of the end-to-end SNR are provided, and ii) the analysis encompasses the vast majority of fading channel models. Numerical and simulation results will be compared to substantiate the analytical derivation.     

Average BER and Capacity Improvement in MIMO-OSTBC Systems Over $$varvec{eta}-varvec{mu}$$ η - μ Fading Channels with Absolute SNR Scheduling

Wireless Personal Communications - In this paper, we consider a multiple-input-multiple-output system employing orthogonal space time block codes over a generalized fading model, namely, $$eta -...     

Modelling and Performance Analysis of Energy Detector Over Weibull–Shadowed Fading Channel with Application to Cooperative Sensing

In this work, we investigate and analyse the performance of the energy detector over Weibull–Shadowed composite fading channel. To this end, we have derived the novel expressions for the probability of detection (PD) and the average area under the receiver operating characteristic curve (AUC). Furthermore, the asymptotic analysis of such performance metrics has been carried out and the simpler and closed-form expressions of the PD and the average AUC have been proposed with maximal ratio combining, equal gain combining, and selection combining diversity schemes. Finally, the derived results have been applied to cooperative system considering erroneous channel between secondary users and a fusion center. The derived expressions are valid for both integer and non-integer values of the multipath and shadowing parameters. The derived analytical results are corroborated by both exact numerical results and Monte-Carlo simulations, and it is shown that the performance of cooperative system not only depends on the parameters of composite fading distribution but also on the erroneous feed-back channel.     

Performance of Multiband Complex-Wavelet-Based MC-CDMA System with Space-Time Coding over Nakagami-m Fading Channels

Space-time coding technique and Multi-carrier CDMA (MC-CDMA) technique have received much interest due to their high frequency spectrum efficiency and high data rate transmission. On the basis of analyzing the two technique principle, utilizing the optimized multiband complex wavelet as multi-carrier basis function, we propose an MC-CDMA system based on multiband complex wavelet and space-time coding for downlink and investigate the system bit error rate (BER) performance over Nakagami-m fading channel. The system has much higher spectrum efficiency and data rate due to no need any cyclic prefix (CP) when compared to the conventional MC-CDMA system. Moreover, the application of space-time coding technique improves the ability against fading channel effectively and perfects the downlink performance further. Simulation results show that the proposed multiband complex-wavelet-based MC-CDMA (MBCW-MC-CDMA) system performs better than conventional MC-CDMA system and real wavelet-packet-based MC-CDMA system due to its superior ability against interferences. Especially, the space-time coded MBCW-MC-CDMA system has superior performance, and it outperforms single antenna MBCW-MC-CDMA and conventional MC-CDMA with space-time coding.     

An efficient spectrum sensing over $$eta - mu$$ η - μ fading on sub 6 GHz bands: A real-time implementation on USRP RIO

Wireless Networks - Massive machine-type communications (mMTC) face spectrum scarcity problems at 5G mid-bands (i.e., sub 6 GHz) due to tens of billions of machine-type devices connected in a...     

Ergodic Capacity and Symbol Error Rate Analysis of a Wireless System with α-μ Composite Fading Channel

Surgeons must intraoperatively view cross-section images under sterilization conditions. Keyboard and computer mouse are sources of contamination. A computer vision algorithm and a hand movement pattern analysis technique have been applied to solve the problem based on surgeon’s behaviors. This paper proposed a new method to control the radiological image viewer in an operating room. A pattern code of hand movement and a grid square guideline are used. Our proposed algorithm comprises three steps: hand tracking, pattern code area identification, and hand movement pattern recognition. First, the system is fed with a sequence of three-dimensional data. A 3D camera captures the whole target body. A skeleton tracking algorithm is used to detect the human body. The left-hand joint in the skeleton data set is tracked. Second, as this algorithm supports one hand movement, a grid square guideline is defined. Hand movements are interpreted from the hand path moving in the grid square area. Finally, the pattern code is defined as a feature vector. By using the feature vector and closest point classifier, the hand movements are recognized by the K-Nearest Neighbors algorithm. To test the performance of the proposed algorithm, data from twenty subjects were used. Seven commands were used to interface with the computer workstation to control the radiological image viewer. The accuracy rate was 95.72%. The repeatability was 1.88. The advantage of this method is that one hand can control the image viewer software from a distance of 1.5 m satisfactorily without contacting computer devices. Our method also does not need big data set to train the system.

     

Performance Analysis of Joint Relay and Transmit–Receive Antenna Selection for Low Density Parity Check-Asynchronous Distributed Space Time Block Coded Cooperative Diversity System

In this work we propose a joint relay and transmit–receive antenna selection method for amplify and forward asynchronous distributed space time block coded (ADSTBC) system. To the LDPC coded signal received from the source at the relays, we apply linear dispersion codes which are optimized over the delay profile of the system to produce the ADSTBC. Selection of the best transmit–receive antenna pair between source and selected relays, and that of between the selected relays and destination is done on the basis of instantaneous signal to noise ratio (SNR) of the respective paths. The relays and transmit-receive antenna pairs are selected by maximizing the end-to-end instantaneous SNR. Performance analysis of the system is done on the basis of pair wise error probability and outage probability (P_out).