The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Small cells are low power nodes, which have lower transmit power than the macro eNodeB. They are regarded as one of the important solutions in long term evolution advanced (LTE-A) to deal with the dramatically increased mobile data traffic. Small cells deployments in LTE-A release 12 with 4 small cells in a cluster suffer from stronger inter-cell interference than heterogeneous network (HetNet) in...
Coordinated multipoint (CoMP) transmission is a key technique in 4G long term evolution (LTE) systems to provide the ubiquitous broadband communication with cell edge free experience at the user equipment (UE). However, as the transmit signals will reach the UE at several and varying delays, practical CoMP networks might experience large timing offsets (TOs), imposing a significant performance loss...
Small cell transmission is a promised technique to enable the tremendous data growth in next generation long term evolution (LTE) networks. However, emerging inter-cell interference is the dominant limiting factor achieving higher network capacities. In this paper we focus on cooperative interference mitigation techniques in interfering heterogeneous network (HetNet) deployments to assist the cell...
Next generation long term evolution (LTE) systems evolve towards small cell networks (SCNs) to enable the tremendous data growth through extreme frequency reuse. However, shrinking the cell size to boost the spectral efficiency comes at the expense of increased co-channel interference (CCI) and is the dominant limiting factor from achieving higher network capacities. Consequently, downlink (DL) scenarios...
Next generation long term evolution (LTE) systems evolve towards small cell transmission to enable the tremendous data growth. However, emerging interference is the dominant limiting factor achieving higher network capacities. In this paper we focus on cooperative implicit feedback generation in interfering heterogeneous networks (HetNets) to assist the cell edge user equipment (UE) suffering from...
Spectrum sensing is one of key technologies in cognitive radio to obtain radio environment knowledge. However, the regular correlator detector suffers from the inference of multipath fading channel on the primary signal. In this paper we propose a theoretically simple, yet effective and implementation-friendly spectrum sensing scheme called multi-peak values (MPV) detector. Based on the criterion...
Wireless power transfer (WPT) system is to provide power transmission via near field magnetic resonant coupling between the transmitter and the receiver with the same frequency. In WPT system the most important parameter is efficiency. This paper proposes different cooperative transmitter matrixes with multiple coils. This design enables receiver coil to be freely placed and charged above the wireless...
Coordinated multipoint (CoMP) transmission is a promised candidate in long term evolution advanced (LTEA) systems to assure coverage and broadband communication for cell edge user equipments (UEs). However, the presence of timing offsets (TOs) between the received signals from multiple transmitters might limit the performance of CoMP transmission. The promised advantages of closed-loop CoMP transmission...
Coordinated multipoint (CoMP) transmission is a key technique in 4G long term evolution (LTE) systems to enable broadband communication and coverage for user equipments (UEs) at the cell edge. However, as the transmit signals will reach the UE at several and varying delays, unsynchronized CoMP transmission might experience large timing offsets (TOs), imposing a significant performance loss. In this...
Coordinated multipoint (CoMP) transmission is one of key technologies to provide broadband communication and coverage for cell edge user equipments (UEs) in long term evolution (LTE) systems. The basic concept behind CoMP transmission are geographically distributed transmitters working jointly in coordinated manner. As the transmit signals reach the UE at different times, CoMP networks might experience...
Coordinated Multipoint (CoMP) transmission is a promising technology in 4G Long Term Evolution (LTE) systems to enable coverage and high data rates for cell edge User Equipments (UEs). However, the presence of Timing Offset (TO) between the received signals from multiple transmitters at the UE could prove prohibitive for CoMP transmission. Such TO affects the estimation of the transmit covariance...
Wireless ad hoc networks have been of significant interest in the communications engineering field within the last decades. Due to their flexibility and relatively low infrastructure and front end expenses, wireless ad hoc networks promise a wide application spectrum. To understand their expected performance, interference limited scenarios must be considered and an interference analysis based on the...
The concept of heterogeneous networks (HetNets) has been introduced in LTE-Advanced systems in order to improve overall capacity and cell-edge user performance. However, such uncoordinated deployments sharing the same spectrum present new interference issues that are difficult to combat with conventional interference management schemes. In this paper interference issues in a macro-femto scenario in...
The contactless charging system has a wide application range and many advantages for portable consumer electronic products. Wireless power transfer (WPT) includes both the transmitter and the receiver which are in the state of resonance to achieve high efficiency. This paper presents a new multiple overlapping coil transmitter structure which enables the receiver has high efficiency within transmitter...
Coordinated Multipoint (CoMP) was adapted as a key technique to improve the coverage of high data rates and the cell-edge user experience in beyond LTE- Advanced systems. CoMP simultaneously supports multiple Transmission Points (TPs) to serve mobile devices in the high interference areas, which occur between cells. In theory it can provide significant gains in the order of high double-digit percentages...
In this manuscript the authors discuss the issues of designing and implementing an H-Bridge circuit with respect to small switching losses, minimal hardware afford and maximal flexibility of excitation and control. The H-Bridge is targeted for a biomedical Wireless Power Transfer (WPT) application, where the receiver (RX) is small compared to the transmitter (TX) and, thus, negligible. Resonance is...
Coordinated multipoint (CoMP) has been identified as a key technology of mitigating interference and improving spectral efficiency of cell edge users in long term evolution (LTE) release 11 and beyond systems. As CoMP operates mostly in a closed-loop transmission fashion, one of the most critical implementation challenges in CoMP systems is the feedback generation. In this letter, a novel, low-complexity...
The aim of this paper is to get an insight of the interference estimation for multi-layer multi-user multiple-input and multiple-output (ML-MU-MIMO) transmission for LTE-Advanced (long term evolution) systems. Different interference-aware receivers have been investigated in ML-MU-MIMO with the presence of co-layer, intra-cell and inter-cell interferences. User-specific reference signal (UE-RS) based...
In this paper, performance of location-aided transmit strategy in bidirectional relay networks over Rician fading channel is studied. This work is based on a three node relay system, where on the relay node, multiple antennas are deployed, and single antenna on other nodes. The idea of the location-aided transmit strategy is to acquire angle-of-arrival (AoA) of signal through relative location of...
In this work a space-frequency block coding (SFBC) system is considered, which is compliant to the Long-Term-Evolution (LTE) specification. The uncoded bit error ratio (BER) of the linear Alamouti SFBC detector with BPSK modulation in the presence of 2-dimensional (2D) channel estimation is analyzed. The work in this paper comprises frequency-selective and Doppler fading. The quality of robust and...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.