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This paper proposes a localization method for wireless sensor nodes that utilize tri-directional coils for near-field magnetic induction (MI) communications. Taking advantage of magnetic field measurements of the tri-directional coils, the proposed localization algorithm uses only two anchor nodes to locate a sensor node in the 3-D space. Assuming each anchor node sequentially transmits the communication...
Respiration rate plays an important role in human health monitoring. Traditional respiration rate monitoring techniques usually require users to wear some special equipment, which is not convenient for the elderly and the baby. Recently, Wi-Fi based respiration detection technique has attracted much attention due to its device-free and low-deployment-cost. However, most existing studies focus on respiration...
This paper considers a wireless power transfer system with multiple antennas by using the multicarrier signal waveforms. A prior art optimizes the waveform with the channel state information at the transmitter (CSIT) to improve the energy harvesting efficiency of the receiver with the non-linear model. The impact of the imperfect CSIT on the energy harvesting capability is studied as a function of...
OceanNet project uses a hierarchical point-to-multi-point backhaul network using long range Wi-Fi technology to provide extended offshore connectivity for fishing vessels. This work is aimed to understand the interrelationship between the design parameters and the reason for considering specific parameter values for the OceanNet solution. The research work explores the communication systems theoretical...
MU-MIMO beamforming offers great potential for the AP with multiple antennas to serve multiple receivers concurrently. A key factor to implement the MU-MIMO system is the CSI feedback mechanism. However, it might be exploited by malicious attackers to threaten the transmission security of benign clients. To better explore the attacks through false CSI feedback in MU-MIMO systems, this paper proposes...
Device-to-device (D2D) communication has been proposed as a solution for vehicle-to-vehicle (V2V) communication, which has strict requirements on reliability and latency. Previous works on V2V communication typically assume single-antenna users, which ignore the potential of multiple antennas. By contrast, this paper studies an uplink power control problem in multi-antenna V2V underlay cellular networks...
We demonstrate how integrated photonic components can be used to generate frequency modulated optical pulses below the Nyquist criteria in order to compress a wideband radio frequency environment for sampling. The compressed signals can be analyzed and extracted using digital signal processing techniques.
Combining the current development of high-gain antenna technology, the inter-satellite terahertz communication system's demand for acquisition pointing and tracking (Acquisition Pointing Tracking, APT) technology are analyzed based on the inter-satellite terahertz communication application. The tracking-pointing error has a major influence on the received power of the communication system by simulating...
Molecular Communication (MC) is a new multidisciplinary subject concerning medicine, biology, and communication engineering. MC concept is introduced for modeling of communication of nano/micro scale devices. In MC systems, chemical signals carrying information in gaseous or liquid media are used. Similar to other communication systems, in MC sending information from transmitter to receiver with minimum...
Magnetic Induction (MI) communication technique may provide promising solution than EM wave-based communication technique for underwater and underground applications where behavior of RF environment is complex, challenging and channel conditions are not constant. The propagation medium is other than air in such applications. MI communication technique overcomes the dynamic channel, propagation loses...
Wireless Networks-on-Chip (WiNoCs) offer unprecedented advantages to replace the long-distance multi-hop communication bottlenecks of conventional NoCs by augmenting them with a single hop, long-range wireless links in many-core systems. In wireless interfaces (WIs), RF transceiver components are consuming a significant amount of total power budgets to replace the multi-hop communications. Specifically,...
Underlaying device-to-device (D2D) transmission in cellular wireless systems is one of the promising transmission techniques for fifth generation (5G) and beyond 5G applications. Nevertheless, the interference between the D2D pairs, the interference from cellular users to D2D receivers and the interference that affects the cellular communications should be mitigated to increase the overall system...
In addition to high data rate, millimeter-wave technology has great potential to provide extremely high localization accuracy. In this paper, we outline the benefits of this technology for positioning and their main applications, which are no longer confined to services only but also to improve communication. We shall focus on the trade-off between data communication and positioning looking the reconfiguration...
In the last few years, there has been a growing interest on the usage of passive WiFi signals for detecting and classifying human behavior activities. In most generality, the idea underlying most state of the art approaches is to monitor changes in the Channel State Information (CSI) or equivalent spectral metrics, caused by the different multi- path conditions (and their temporal variations) induced...
In preparation of potential future Earth observation Synthetic Aperture Radar (SAR) missions, the European Space Agency (ESA) is conducting instrument preparatory activities. This paper presents the status and results of the instrument pre-developments for an L-band receive-only SAR, which would fly in formation with an active SAR satellite acting as an illuminator. Such formations would enable e...
Co-channel interference is a dominant limiting factor for LTE uplink system capacity. BS (Base station) MMSE-IRC (Minimum mean square error — interference rejection combining) receiver, as a promising approach for spatial domain interference handling, is introduced in LTE-Advanced Release 13. This paper firstly gives the signal model and receiver structure for BS MMSE-IRC. To evaluate MMSE-IRC performance...
Collaborative reception has been proposed to improves the frequency utilization efficiency in wireless networks. This paper proposes a novel iterative noise cancelling receiver with soft-output lattice reduction (LR)-aided detector, which improves further frequency utilization efficiency. The proposed receiver achieves near optimum performance by removing an equivalent noise generating in the MMSE...
In this paper, we analyze uplink sum rate of multiple-input multiple-output (MIMO) systems with maximum-ratio combining (MRC) receivers. To be practical, receive correlation and different powers of users are assumed. Two novel approximate results on sum rate are derived in closed form. Based on the results, we also obtain the asymptotic results on sum rate when the number of base station antenna (M)...
In-Band Full-Duplex transmissions are promising solutions for wireless 5G small cell communication scenarios. It allows to increase the overall capacity under certain conditions. In this paper we evaluate two combined techniques to mitigate the analog self-interference. Instead of using high performance components with high linearity and high bandwidth for a frequency band, a single SDR chip has been...
Differential spatial modulation (DSM) is a novel attractive alternative technique for coherent spatial modulation (CSM) without channel state information (CSI) at the receiver. In this paper, iterative detection is firstly employed to improve the performance of DSM schemes. With the Hamming distance of two matrices reduced to the sum of simple elements, a lowcomplexity iterative detection scheme for...
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