Conferences related to Downlink

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ICC 2015 - 2015 IEEE International Conference on Communications

IEEE ICC is one of the two flagship IEEE conferences in the field of communications; London is to host this conference in 2015. Each annual IEEE ICC conference typically attracts approximately 1,500-2,000 attendees, and will present over 1,000 research works over its duration. As well as being an opportunity to share pioneering research ideas and developments, the conference is also an excellent networking and publicity event, giving the opportunity for businesses and clients to link together, and presenting the scope for companies to publicise themselves and their products among the leaders of communications industries from all over the world.

  • ICC 2014 - 2014 IEEE International Conference on Communications

    The International Conference on Communications (ICC) is one of the two flagship conferences of the IEEE Communications Society, together with IEEE Globecom. Each year the ICC conference attracts about 2-3.000 submitted scientific papers, a technical program committee involving about 1.500 experts provides more than 10.000 reviews, the conference being finally attended by 1.500 - 2.000 professionals from all around the world. IEEE ICC is therefore one of the most significant scientific events of the networking and communications community, a must-attend forum for both industrials and academics working in this area.

  • ICC 2013 - 2013 IEEE International Conference on Communications

    A full programs of technical and professional activities spanning the entire range of hot topics in voice, data, image, quality of service, home networking, signal processing, wireless, optical, and multimedia communications

  • ICC 2012 - 2012 IEEE International Conference on Communications

    Full programs of technical and professional activities spanning the entire range of hot topics in voice, data, image, quality of service, home networking, signal processing, wireless, optical, and multimedia communications

  • ICC 2011 - 2011 IEEE International Conference on Communications

    A full programs of technical and professional activities spanning the entire range of hot topics in voice, data, image, quality of service, home networking, signal processing, wireless, optical, and multimedia communications.

  • ICC 2010 - 2010 IEEE International Conference on Communications

    Telecommunications

  • ICC 2009 - 2009 IEEE International Conference on Communications

  • ICC 2008 - 2008 IEEE International Conference on Communications

  • ICC 2007 - 2007 IEEE International Conference on Communications


2014 IEEE 80th Vehicular Technology Conference (VTC Fall)

VTC will bring together individuals from academia, industry and government to discuss and exchange ideas in the fields of mobile, wireless and vehicular technology as well as the applications and services associated with such technology. Features include world-class plenary speakers, panel sessions, tutorials, and both technical and application-based sessions.


2013 IEEE 77th Vehicular Technology Conference (VTC Spring)

VTC will bring together individuals from academia, industry and government to discuss and exchange ideas in the fields of mobile, wireless and vehicular technology as well as the applications and services associated with such technology. Features include world-class plenary speakers, panel sessions, tutorials, and both technical and application-based sessions.


TENCON 2013 - 2013 IEEE Region 10 Conference

Communication and network,Signal and information processing,Automatic control,Computational intelligence,Intelligent transportation,Grid and cloud computing,Cognitive radio and system,Internet of things,Computer science and technology,Audio and speech processing,Electronic devices,Circuits and systems,Power and energy,Microwave, antennas and propagation,Information and data security,System design and implementation

  • TENCON 2012 - 2012 IEEE Region 10 Conference

    TENCON is a general engineering conference covering electrical and electronics engineering and computer science. The theme of the conference is "Sustainable Development through Humanitarian Technology". The conference will be organized under several different tracks consisting of power engineering, signal processing, communications, computing, circuits and systems, software systems and the theme.

  • TENCON 2011 - 2011 IEEE Region 10 Conference

    Trends and Development in Converging Technology towards 2020

  • TENCON 2010 - 2010 IEEE Region 10 Conference

    Information and Communication Technologies

  • TENCON 2009 - 2009 IEEE Region 10 Conference

    The theme of the conference is "Emerging Technologies for Sustainable Development". Topics of interest include, but are not limited to, Power and Energy; Signal Processing; Networks and Communications; Circuits and Systems; Computational Intelligence; Computing Architectures & Systems; Software and Database Systems.

  • TENCON 2008 - 2008 IEEE Region 10 Conference

    TENCON 2008 is a general engineering conference covering electrical and electronics engineering and computer science. The theme of the conference is 'innovative technologies for societal transformation'. The conference will be organized under seven different tracks consisting of power engineering, signal processing, communications, computing, circuits and systems, software systems and the theme.

  • TENCON 2007 - 2007 IEEE Region 10 Conference

    Computing, Communications, Signal Processing, Energy & Infrastructure, Antennas and Propagation, System-on-Chip, Computer Networks, Optical Electronics , Technology & Society

  • TENCON 2006 - 2006 IEEE Region 10 Conference

  • TENCON 2005 - 2005 IEEE Region 10 Conference


2012 IEEE International Conference on Communication Systems (ICCS)

The following and related areas in Information and Communication Engineering: green communications, antennas and propagation, wireless networks, data security, communication theory, information theory, signal processing, data centre networks, optical communications, satellite communications, smart grid communications.

  • 2010 IEEE International Conference on Communication Systems (ICCS)

    Antennas, propagation & channel modeling Cognitive radio Dynamic spectrum management Green communication technologies & Systems Information theory Medical ICT systems Microwave devices & systems Mobile radio communication systems Modulation & coding Network architecture and security Optical communications & photonics Resource allocation, mobility management & QoS provisioning Satellite communications Signal processing for communications Space time processing & MIMO systems Ultra wideband tech

  • 2008 11th IEEE Singapore International Conference on Communication Systems (ICCS)

    Antennas, propagation & channel modeling, Cognitive radio, High speed networks, Information theory, Microwave devices & systems, Mobile radio communication systems, Modulation & coding, Network architecture and security, Optical communications & photonics, Signal processing for communications, MIMO systems, Spread spectrum systems, Ultra wideband technology, Wireless ad-hoc & sensor networks.



Periodicals related to Downlink

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Signal Processing, IEEE Transactions on

The technology of transmission, recording, reproduction, processing, and measurement of speech; other audio-frequency waves and other signals by digital, electronic, electrical, acoustic, mechanical, and optical means; the components and systems to accomplish these and related aims; and the environmental, psychological, and physiological factors of thesetechnologies.




Xplore Articles related to Downlink

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Optimal power allocation for energy efficiency maximization in 5G downlink multiuser systems

Y. Ma; X. Wang; Y. T. Guo; M. Zhao 2016 Progress in Electromagnetic Research Symposium (PIERS), 2016

In this letter, an optimal power allocation scheme for energy efficiency (EE) maximization with low complexity in 5G downlink multiuser systems is presented. The optimal power allocation is obtained in two steps. The first step is to find the power scheme to maximize the geometric mean of weighted average channel gains corresponding to any fixed total dynamic power. The second ...


An efficient software-based implementation of a joint-detection/spatial processing receiver for TD-SCDMA

P. Aberl; A. Gatherer Proceedings. 2004 IEEE Radio and Wireless Conference (IEEE Cat. No.04TH8746), 2004

TD-SCDMA is known as the low chip-rate time division duplex (LCR TDD) mode of the third generation partnership program (3GPP). It incorporates a combination of time and code division multiple access schemes and is well suited for advanced techniques like joint detection (JD) and spatial processing. This work focuses on the performance and memory requirements of a completely software-based zero-forcing ...


Voice traffic bicasting enhancements in mobile HSPA network

Vesa Hytönen 2014 11th International Symposium on Wireless Communications Systems (ISWCS), 2014

This paper discusses methods for improving the effectiveness of delivering voice traffic over High-Speed Downlink Packet Access (HSDPA) network by employing transmission diversity with Single-Frequency Dual-Cell (SF-DC) Aggregation that is part of the Multiflow specification. SF-DC Aggregation allows the user to be served at the same time by two different cells. The enhancements discussed in the paper capitalize strongly on ...


Backhaul-Constrained Multicell Cooperation Leveraging Sparsity and Spectral Clustering

Swayambhoo Jain; Seung-Jun Kim; Georgios B. Giannakis IEEE Transactions on Wireless Communications, 2016

Multicell cooperative processing with limited backhaul traffic is studied for cellular uplinks. Aiming at reduced backhaul overhead, a sparse multicell linear receive-filter design problem is formulated. Both unstructured distributed cooperation and clustered cooperation, in which base station groups are formed for tight cooperation, are considered. Dynamic clustered cooperation, where the sparse equalizer and the cooperation clusters are jointly determined, is ...


CDMA equalizer quantization

T. A. Sexton; M. J. Heikkila; J. Lilleberg; K. Majonen; K. Rounioja; P. A. Ivanov Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE, 2004

Our topic is channel equalizer quantization for a cellular handset. We answer questions regarding quantization of variables internal to the equalizer using some estimated bounds and simulation. This includes the catastrophic event of breakdown due to a roundoff-induced singularity in Cholesky factorization. Realistic modeling of the received waveform and channel estimation includes quantization effects, as well as quantization of the ...


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Educational Resources on Downlink

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eLearning

Optimal power allocation for energy efficiency maximization in 5G downlink multiuser systems

Y. Ma; X. Wang; Y. T. Guo; M. Zhao 2016 Progress in Electromagnetic Research Symposium (PIERS), 2016

In this letter, an optimal power allocation scheme for energy efficiency (EE) maximization with low complexity in 5G downlink multiuser systems is presented. The optimal power allocation is obtained in two steps. The first step is to find the power scheme to maximize the geometric mean of weighted average channel gains corresponding to any fixed total dynamic power. The second ...


An efficient software-based implementation of a joint-detection/spatial processing receiver for TD-SCDMA

P. Aberl; A. Gatherer Proceedings. 2004 IEEE Radio and Wireless Conference (IEEE Cat. No.04TH8746), 2004

TD-SCDMA is known as the low chip-rate time division duplex (LCR TDD) mode of the third generation partnership program (3GPP). It incorporates a combination of time and code division multiple access schemes and is well suited for advanced techniques like joint detection (JD) and spatial processing. This work focuses on the performance and memory requirements of a completely software-based zero-forcing ...


Voice traffic bicasting enhancements in mobile HSPA network

Vesa Hytönen 2014 11th International Symposium on Wireless Communications Systems (ISWCS), 2014

This paper discusses methods for improving the effectiveness of delivering voice traffic over High-Speed Downlink Packet Access (HSDPA) network by employing transmission diversity with Single-Frequency Dual-Cell (SF-DC) Aggregation that is part of the Multiflow specification. SF-DC Aggregation allows the user to be served at the same time by two different cells. The enhancements discussed in the paper capitalize strongly on ...


Backhaul-Constrained Multicell Cooperation Leveraging Sparsity and Spectral Clustering

Swayambhoo Jain; Seung-Jun Kim; Georgios B. Giannakis IEEE Transactions on Wireless Communications, 2016

Multicell cooperative processing with limited backhaul traffic is studied for cellular uplinks. Aiming at reduced backhaul overhead, a sparse multicell linear receive-filter design problem is formulated. Both unstructured distributed cooperation and clustered cooperation, in which base station groups are formed for tight cooperation, are considered. Dynamic clustered cooperation, where the sparse equalizer and the cooperation clusters are jointly determined, is ...


CDMA equalizer quantization

T. A. Sexton; M. J. Heikkila; J. Lilleberg; K. Majonen; K. Rounioja; P. A. Ivanov Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE, 2004

Our topic is channel equalizer quantization for a cellular handset. We answer questions regarding quantization of variables internal to the equalizer using some estimated bounds and simulation. This includes the catastrophic event of breakdown due to a roundoff-induced singularity in Cholesky factorization. Realistic modeling of the received waveform and channel estimation includes quantization effects, as well as quantization of the ...


More eLearning Resources

IEEE-USA E-Books

  • High Speed Downlink and Uplink Packet Access

    This chapter contains sections titled: Introduction High Speed Downlink Packet Access High Speed Uplink Packet Access Implementation Issues

  • Galileo

    Galileo comprises a space segment, a ground segment, and a user segment. The fully deployed system consists of a minimum of 24 satellites and extensive worldwide ground infrastructure. This chapter provides a brief history of Galileo and provides detailed characteristics of Galileo signals. Galileo was designed to offer four navigation services as well as a search and rescue service. The Open Service (OS) provides signals for timing and positioning to anyone, free of user charges. The Safety-of-Life service (SoL) had originally been developed to provide assured integrity signals for timing and positioning. The GMS uses a global network of Galileo Sensor Stations (GSS) to monitor Galileo downlink signals for two purposes: measurement of orbit and clock offsets from each satellite, and monitoring the integrity of each signal. The chapter summarizes the frequency plan using what has become Galileo's notation.

  • Design Considerations of Biomedical Telemetry Devices

    The specifications for an implantable medical device (IMD) are provided by the application but share a common set of constraints in size, power, and functionality. This chapter provides a brief overview of the design of biomedical telemetry devices and in particular IMDs using inductive links. The basic system architecture and inductive link fundamentals are discussed, as well as methods and circuits for power transfer and data communication. Safety issues relating to overheating of body tissue as a result of increase of temperature are also examined. There are several methods of harvesting energy for IMDs such as kinetic, thermoelectric, fuel cells, infrared radiation, low- frequency magnetic fields, and inductive links. Data communication is called the downlink from the transmitter to the implant, and the uplink from the implant to the transmitter. Due to dual data and power transfer, the carrier amplitude is greater than or equal to the supply voltages.

  • Radio Frequency and Visible Light Communication Internetworking

    Visible light communication internetworking (VLC) is considered to be a promising network technology that can offer high data rates with almost no transmission power consumption. It suffers from some technical limitations that motivate its integration with RF network technologies to enhance the overall network performance. This chapter discusses RF and VLC integration in heterogeneous networks. It presents several integration objectives such as load balancing, throughput maximization and uplink data transmission. The chapter focuses on RF and VLC internetworking for green communications. It presents a radio resource allocation mechanism that can improve downlink energy efficiency in an integrated RF¿¿?VLC network. The chapter demonstrates the superior performance of the heterogeneous integrated RF¿¿?VLC network and compares with the benchmarks that support an RF¿¿?only network or a heterogeneous network consisting of two RF systems, respectively.

  • Energy Aware Traffic Load Balancing in Mobile Networks

    This chapter discusses traffic load balancing schemes that optimize network utilities, for example, average traffic delivery latency and green energy utilization. It first presents Intelligent Cell brEathing (ICE) to minimize the maximal EDRs of LBSs, thus maximizing the utilization of green energy at each stage. Then, the chapter considers a heterogeneous network with multiple MBSs and SCBSs. Both the MBSs and SCBSs are powered by on¿¿¿grid power and green energy. The chapter considers solar power as the green energy source. It focuses on balancing the downlink traffic loads among BSs by designing a green energy and latency aware user association scheme. The chapter adopts a software¿¿¿defined radio access network (SoftRAN) architecture in which all BSs are controlled by the RAN controller (RANC). It also investigates traffic load balancing in backhaul constrained cache¿¿¿enabled small cell networks with hybrid power supplies, and optimizes the BS traffic load and power distribution for mobile networks powered by smart grid.

  • Multiantenna Systems

    This chapter provides an overview of multiantenna systems. Smart antennas at the base station can increase capacity through Spatial Filtering for Interference Reduction (SFIR) or Space Division Multiple Access (SDMA). Transceiver structures include switched-beam antennas, and adaptive space-time processing, combined with temporal-reference (TR) and spatial reference (SR) algorithms, or blind algorithms. Random beamforming allows to exploit multiuser diversity. If channel state information (CSI) at the transmitter is needed but uplink and downlink are not reciprocal, codebook-based feedback of CSI is efficient, using, e.g., codebooks based on Grassmannian linepacking, or Kronecker models for correlated channels. MIMO (multiple-input ï¿¿ï¿¿ï¿¿ multiple-output) systems can be used for (i) beamforming, (ii) diversity, (iii) interference suppression, and (iv) spatial multiplexing. Transmission schemes with full CSI at the transmitter are based on singular value decomposition of the channel, appropriate linear precoding and waterfilling converts a MIMO channel to a number of parallel channels. Without CSI at the transmitter, layered space-time transmission schemes (BLAST) can be used. Equations for the ergodic capacity and outage capacity are given. Propagation channel characteristics, in particular line-of-sight conditions, channel correlation, and keyhole channels, need to be taken into account. Orthogonal space-time block codes (STBC) including Alamouti codes, and space-time trellis codes (STTC) can provide diversity. For the uplink of multiuser MIMO, joint detection at the BS is used. For the downlink, nonlinear (dirty paper coding, Tomlinson-Harashima precoding) or linear (block diagonalization, coordinated beamforming, joint Wiener filtering, channel inversion, regularized channel inversion, joint leakage suppression) techniques can be used. In base station cooperatio n (network MIMO, Cooperative MultiPoint CoMP) multiple BSs are connected to form a larger MIMO array.

  • 3GPP LongTerm Evolution

    We describe the 3GPP Long Term Evolution (LTE) standard, a member of the IMT- Advanced family for fourth-generation cellular communications. The system consists of radio access network (RAN) and core network (System Architecture Evolution SAE or Enhanced Packet Core EPC). Layers of the transmission protocol range from Packet Data Convergence Protocol (PDCP) to Radio Link Control (RLC), MAC, and PHY. After an overview of the physical layer, the division of the time axis into frames, subframes, and slots is discussed. The modulation format is OFDM for the downlink, and single-carrier transmission with frequency domain equalization (SC-FDE) for the uplink. We define resource element and resource blocks (RB). Data are mapped onto physical resources by first mapping symbols onto virtual resource blocks (VRBs), and from there to physical resource blocks (PRBs). There exist two types of reference signals RS (pilot tones): demodulation RS, and sounding RS; both based on Chadoff-Zhu sequences. Error control coding includes cyclic redundancy check (CRC), convolutional codes or turbo codes, and Hybrid ARQ (HARQ). Multiple-antenna techniques include Alamouti codes, possibly combined with antenna selection, for transmit diversity and (open-loop or closed-loop) spatial multiplexing. LTE distinguishes between logical channels and physical channels (time/frequency resources). Logical subchannels include Traffic channels (DTCH, MTCH) and Control channels (BCCH, PCCH, CCCH, DCCH, MCH). These are then mapped, via certain transport channels, to the physical channels. Primary and secondary synchronization signals carry timing information and cell ID. We discuss control information associated with downlink shared channel and uplink signaling (uplink control information, random access, and control signaling for the uplink shared channel). We also describe physical layer procedures, including establishing of a connection, retransmission methods, scheduling, power control, and handover.

  • Multiple Access and the Cellular Principle

    This chapter discusses the simultaneous communication of multiple users. We start out by discussing multiple access between a single base station (access point) and multiple mobile stations (handsets, users). In particular, Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA) allow a simple assignment of the resources to different users; Code Division Multiple Access (CDMA) is relegated to Chapter 18. Basic aspects of queuing theory, including the Erlang B and Erlang C model, are then introduced, and we show that due to the trunking gain, the admissible ratio of offered traffic to number of available channels increases (for a given outage probability) when the number of available channels increases. We then discuss various schemes for multiple access for packet radio, including Aloha, slotted Aloha, Carrier Sense Multiple Access (CSMA) and packet reservation multiple access. A brief discussion of routing in packet radio is also given, though a more extensive discussion is relegated to Chapter 22. Duplexing, in particular Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD), allows the separation of transmitted and received data. We then describe the cellular principle. In order to increase the number of simultaneous links on which communication can take place, an area is divided into multiple cells, each of which has one base station. In order to limit interference, the same time- frequency resource can only be reused in cells separated by a certain minimum reuse distance; the number of cells that are all using disjoint time-frequency resources is called the cluster size. For the simple case of hexagonal cells, explicit equations for cluster size are given. Various methods for increasing capacity, including overlay structures, fractional loading, and partial frequency reuse, are also discussed. The information theory of bro adcast channels (downlink) and multiple-access channels (uplink) is also briefly described.

  • Reception of Spread Spectrum Signals in AWGN Channels

    In this chapter we review the fundamental concepts of the reception of signals transmitted over AWGN channels, first of all the reception of wideband signals transmitted over multiple access channels with additive white Gaussian noise. Our consideration is based on the Neyman-Pearson theory. We study coherent reception of uplink and downlink transmitted DS CDMA signals, differential phase-shift keying, and reception of FH SS signals.

  • Subcarrier-Multiplexed ROF Downlink

    Chapter 5 provides detailed analysis of a fiber-wireless forward link when more than one multiuser RF signals are transmitted over fiber. Wi-Fi and cellular radio signals are considered. The concept of nonlinearity induced co- channel interference is introduced in this chapter. Detailed mathematical expressions are derived for signal to distortion, noise and (multiuser) interference ratios for both wireless systems considering optical link nonlinearity and wireless channel fading. Simulation results are also shown.



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