4,153 resources related to Multipath channels
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ICC 2021 - IEEE International Conference on Communications
IEEE ICC is one of the two flagship IEEE conferences in the field of communications; Montreal is to host this conference in 2021. 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 publicize themselves and their products among the leaders of communications industries from all over the world.
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting
The joint meeting is intended to provide an international forum for the exchange of information on state of the art research in the area of antennas and propagation, electromagnetic engineering and radio science
The 2020 IEEE International Conference on Systems, Man, and Cybernetics (SMC 2020) will be held in Metro Toronto Convention Centre (MTCC), Toronto, Ontario, Canada. SMC 2020 is the flagship conference of the IEEE Systems, Man, and Cybernetics Society. It provides an international forum for researchers and practitioners to report most recent innovations and developments, summarize state-of-the-art, and exchange ideas and advances in all aspects of systems science and engineering, human machine systems, and cybernetics. Advances in these fields have increasing importance in the creation of intelligent environments involving technologies interacting with humans to provide an enriching experience and thereby improve quality of life. Papers related to the conference theme are solicited, including theories, methodologies, and emerging applications. Contributions to theory and practice, including but not limited to the following technical areas, are invited.
The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.
IEEE Global Communications Conference (GLOBECOM) is one of the IEEE Communications Society’s two flagship conferences dedicated to driving innovation in nearly every aspect of communications. Each year, more than 2,900 scientific researchers and their management submit proposals for program sessions to be held at the annual conference. After extensive peer review, the best of the proposals are selected for the conference program, which includes technical papers, tutorials, workshops and industry sessions designed specifically to advance technologies, systems and infrastructure that are continuing to reshape the world and provide all users with access to an unprecedented spectrum of high-speed, seamless and cost-effective global telecommunications services.
Broadcast technology, including devices, equipment, techniques, and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.
Part I will now contain regular papers focusing on all matters related to fundamental theory, applications, analog and digital signal processing. Part II will report on the latest significant results across all of these topic areas.
Covers topics in the scope of IEEE Transactions on Communications but in the form of very brief publication (maximum of 6column lengths, including all diagrams and tables.)
IEEE Communications Magazine was the number three most-cited journal in telecommunications and the number eighteen cited journal in electrical and electronics engineering in 2004, according to the annual Journal Citation Report (2004 edition) published by the Institute for Scientific Information. Read more at http://www.ieee.org/products/citations.html. This magazine covers all areas of communications such as lightwave telecommunications, high-speed data communications, personal communications ...
Telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation, including radio; wire; aerial, underground, coaxial, and submarine cables; waveguides, communication satellites, and lasers; in marine, aeronautical, space and fixed station services; repeaters, radio relaying, signal storage, and regeneration; telecommunication error detection and correction; multiplexing and carrier techniques; communication switching systems; data communications; and communication theory. In addition to the above, ...
Visible Light Communications: Modulation and Signal Processing, None
This chapter presents a review of carrier‐less and single carrier modulation schemes for visible light communication (VLC). The chapter also offers a brief introduction of modulation and coding techniques recently developed for dimming control and flicker mitigation to meet the illumination requirements. Dimming control can be achieved and the simplicity and robustness inherited from pulse position modulation (PPM) can be ...
IET Communications, 2008
Ultra-wideband (UWB) is seen as a potential candidate for wireless communication and other applications as it possesses many attractive features. The multipath profile of UWB consists of resolvable components. However, unlike narrow-band pulses, the received components in different directions are fundamentally different from the transmitted signal. Traditionally, RAKE receivers work by correlating the received signal with the source signal. Although ...
ICCSC'02. 1st IEEE International Conference on Circuits and Systems for Communications. Proceedings (IEEE Cat. No.02EX605), 2002
UMTS is the European standard of the third generation of mobile communications and its air interface is called WCDMA. In this paper a simple WCDMA system in downlink and FDD mode is simulated and results are presented. The simulation that is an execution, apart from physical layer functions as layer 1, includes data modulation, spreading multipath channel, AWGN noise, data ...
Proceedings. 2005 International Conference on Wireless Communications, Networking and Mobile Computing, 2005., 2005
Ultra-Wideband (UWB) system mostly works in a dense multipath environment. It has been proved that good diversity gain can be obtained by a rake receiver over this kind of channel to resist multipath fading. In this paper, the Price and Green's rake receiver which is well known in CDMA system is used for UWB system with some necessary modifications. The ...
Canadian Conference on Electrical and Computer Engineering, 2005., 2005
This paper presents a multicarrier asynchronous direct-sequence code-division multiple-access (DS-CDMA) system wherein the output of a turbo product encoder modulates multiple band-limited DS-CDMA waveforms, which are transmitted in parallel at different carrier frequencies. The receiver detects and combines signals for the desired user and feeds an iterative decoder. The performance of this system is compared to that of a conventional ...
Fabulous: WIE ILC 2019
Why do RESEARCHERS use IEEE Collabratec?
Carrier Aggregation Receivers - Shimi Shilo & Dror Regev - RFIC Showcase 2018
Hyperdimensional Biosignal Processing: A Case Study for EMG-based Hand Gesture Recognition - Abbas Rahimi: 2016 International Conference on Rebooting Computing
Shlomo Shamai accepts the IEEE Richard W. Hamming Medal - Honors Ceremony 2017
26th Annual MTT-AP Symposium and Mini Show - Ken Kenjale
Keynote: Gerhard Fettweis - Terahertz Communication - B5GS 2019
Quantum Photonic Networks for Computing and Simulation - Plenary Speaker: Ian Walmsley - IPC 2018
ComSoc Digital Library
What's Next: Rebooting Computing
IEEE Sections Congress 2014: Luc Van den Hove, Wearable Medical Technology
Soar! Claiming Your Power and Getting What You REALLY Want - Seeta Hariharan keynote from IEEE WIE Forum USA East 2017
This chapter presents a review of carrier‐less and single carrier modulation schemes for visible light communication (VLC). The chapter also offers a brief introduction of modulation and coding techniques recently developed for dimming control and flicker mitigation to meet the illumination requirements. Dimming control can be achieved and the simplicity and robustness inherited from pulse position modulation (PPM) can be maintained. CAP is a bandwidth‐efficient two‐dimensional (2‐D) passband transmission scheme. The basic principle of CAP is to choose two orthogonal ?lters to modulate two different data streams, which are combined for simultaneous transmission. Alternatively, the CAP transceiver can be regarded as a trans‐multiplexer. The shaping filter at the transmitter is implemented by an up‐sampled finite impulse response (FIR) window from the original continuous‐time non‐causal signal, while the equalizer at the receiver is down sampled to match the original symbol rate.
Ultra-wideband (UWB) is seen as a potential candidate for wireless communication and other applications as it possesses many attractive features. The multipath profile of UWB consists of resolvable components. However, unlike narrow-band pulses, the received components in different directions are fundamentally different from the transmitted signal. Traditionally, RAKE receivers work by correlating the received signal with the source signal. Although this proved sufficient in the narrowband transmission, it is not the case for the wideband. Some researchers showed that significant improvement in captured energy (CE) in the wideband reception could be achieved by correlating the received signal with multiple received templates. The author re-visits the issue to assess the amount of improvement resulting from multi- template reception of UWB signals and its relation to the number and type of templates. Moreover, the author studies the cost of the multi-template reception. Finally, a threshold-based capturing technique that reduces the cost of reception while maintaining most of the attainable gain in CE is proposed.
UMTS is the European standard of the third generation of mobile communications and its air interface is called WCDMA. In this paper a simple WCDMA system in downlink and FDD mode is simulated and results are presented. The simulation that is an execution, apart from physical layer functions as layer 1, includes data modulation, spreading multipath channel, AWGN noise, data demodulation, despreading and Rake receiver. It is obvious that transmission methods of data correspond to WCDMA standards. In other words, frames and slots structure, data symbols setting and required parameters follow the defined standards.
Ultra-Wideband (UWB) system mostly works in a dense multipath environment. It has been proved that good diversity gain can be obtained by a rake receiver over this kind of channel to resist multipath fading. In this paper, the Price and Green's rake receiver which is well known in CDMA system is used for UWB system with some necessary modifications. The channel information can be estimated by this receiver without a pilot when M-ary orthogonal modulation is used. So Ms orthogonal short impulse waveforms is used as the transmitted waveforms to implement the M-ary orthogonal modulation. This method has low complexity and processing delay. In particular, it is much fit for fast time- varying channel.
This paper presents a multicarrier asynchronous direct-sequence code-division multiple-access (DS-CDMA) system wherein the output of a turbo product encoder modulates multiple band-limited DS-CDMA waveforms, which are transmitted in parallel at different carrier frequencies. The receiver detects and combines signals for the desired user and feeds an iterative decoder. The performance of this system is compared to that of a conventional single-carrier DS-CDMA system with a RAKE receiver, assuming a slowly varying frequency-selective Rayleigh fading channel. At roughly equivalent receiver complexity, results will demonstrate superior performance of the multicarrier system in the presence of partial-band interference
In this paper, we introduce a decorrelating discrete-time RAKE receiver for MIMO systems. Conventional RAKE receivers require acquisition and tracking systems to detect new paths and to follow them. To avoid this requirement a discrete-time RAKE receiver (DTR) has been proposed, which is obtained by sampling the received signal at twice the chip rate. The DTR works well in both specular and diffuse multipath channels. A drawback of the DTR is its sensitivity to channel estimation errors. To eliminate this weakness an optimum combining technique has been introduced, called the decorrelating discrete-time RAKE receiver (D-DTR). The D-DTR exploits the covariance matrix of the discrete-time channel for a better robustness against channel estimation errors. In this paper, we extend this system to the MIMO case. Our simulations show that gains up to 2 dB are available in 2 transmit 2 receive antenna and 3 transmit 3 receive antenna systems at a bit error rate of 10.
It is necessary to devise the method for increasing the bandwidth efficiency in order to provide the high speed mobile multimedia communication services with CDMA under the limited radio bandwidth resources. In this paper the structure for transmitting the high-speed data at the half bandwidth of the required bandwidth using the symmetry property of the IFFT output of the binary input MC-CDMA, which enables the time scaling method utilized, is proposed. The processing gain is increased 4 times than the DS-CDMA and its performance is evaluated to be compared with DS-CDMA with RAKE receivers under the Rayleigh fading channel and same bandwidth per one channel.
Multipath propagation is common in sonar and radar, and it has made the task of time delay estimation much more difficult. In this paper, an adaptive algorithm based on a generalized equalization approach is proposed which provides spontaneous measurements of the difference in arrival times of a signal received at two separated sensors as well as the multipath channel characteristics. The method attempts to minimize a multimodal cost function whose global minimum gives the exact values of the time delay and multipath parameters. A simple initialization scheme is employed and the stochastic gradient descent method is used for descending toward the minimum of the performance surface. The performance of the proposed algorithm is analysed and simulation results are given to illustrate that the method is capable of estimating the system parameters accurately for different number of multipaths.
We present the effects of correlated or/and non-identical fading channels as well as outdated/imperfect channel estimations on the performance of newly proposed finger reassignment and replacement schemes for RAKE receivers in the soft handover region. The performance of these schemes were previously analyzed by the authors over independent and identically distributed Rayleigh fading channels. In this paper, we consider the exponentially decaying power delay profile among paths with the exponential and constant correlation models. The effect of outdated/imperfect channel estimations is also evaluated. Simulation results show that our proposed schemes are still offering an interesting performance versus network overhead tradeoff in the practical channel environments considered in this paper.
No standards are currently tagged "Multipath channels"