High-speed asymmetric and symmetric digital subscriber line loop access systems, designed by numerous computer networking and telecommunications equipment companies, are currently the focus of technical trials, market ...
Tópico(s): Multimedia Communication and Technology
1999 - Institute of Electrical and Electronics Engineers | IEEE Communications Magazine
Bin Lee, J.M. Cioffi, Sumanth Jagannathan, Mehdi Mohseni,
... binder MIMO channel model, a performance assessment of digital subscriber line (DSL) technology based on MIMO transmission methods finds that symmetric data rates of more than 1 Gbps are ...
Tópico(s): Electromagnetic Compatibility and Noise Suppression
2007 - IEEE Communications Society | IEEE Transactions on Communications
Helmut Dietl, Remco van der Velden,
... digital subscriber line) and the market for SDSL (symmetric digital subscriber line). When both markets came into being in the ...
Tópico(s):
2002 - IOS Press | International Journal of Regulation and Governance
Fumihito Sasamori, Shiro Handa,
... In order to enhance the advantages, an Hermite-symmetric subcarrier coding for OFDM, which is used for transmission systems like the asymmetric digital subscriber line (ADSL) and multiband OFDM in ultra-wideband (UWB) communications, is very attractive. The subcarrier coding can force the imaginary part of the OFDM signal to be zero, then another data sequence can be simultaneously transmitted in the quadrature channel. In order to theoretically verify the effectiveness of the Hermite-symmetric subcarrier coding in wireless OFDM (HC-OFDM) systems, ...
Tópico(s): PAPR reduction in OFDM
2012 - Institute of Electronics, Information and Communication Engineers | IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences
... to asymmetric DSL (ADSL). Few ever mention SDSL (symmetric digital subscriber line) or G.SHDSL, its faster cousin. However, this ...
Tópico(s): ICT Impact and Policies
2004 - | Communications Engineer
... per subscriber, above which the limited reach of digital subscriber line (xDSL) makes it less cost-effective to deploy than fiber to the home (FTTH), when all network costs are explicitly accounted for. We also show that, when near-symmetric upstream bandwidth is required, the argument for deploying ...
Tópico(s): Optical Network Technologies
2003 - Wiley | Bell Labs Technical Journal
... of the major impairments to the current asymmetric digital subscriber line (ADSL) downstream transmission. This paper presents two methods for an ADSL receiver to cancel one (dominant) NEXT signal from other types of services (such as HDSL (high-bit-rate DSL), SDSL (single-pair, symmetric DSL), T1, etc.). The methods exploit the fact ...
Tópico(s): Advanced Wireless Communication Techniques
2002 - Institute of Electrical and Electronics Engineers | IEEE Journal on Selected Areas in Communications
... twisted pairs. The ISDN basic rate access 2B1Q digital subscriber line (DSL) was the first technology of this type to be deployed commercially at 160 kb/s full-duplex transmission on a single twisted pair. Other transmitter/receiver circuits have been developed over the years that support symmetric and asymmetric data transmission from several hundreds of ...
Tópico(s): Wireless Communication Networks Research
1997 - Institute of Electrical and Electronics Engineers | IEEE Communications Magazine
Fredrik Lindqvist, Antoni Fertner,
This letter addresses echo cancellation for digital subscriber line (DSL) communications with discrete multitone (DMT) modulation. The described adaptive echo canceller operates entirely in the frequency domain. The method allows estimation and subtraction of an echo signal impaired by intercarrier and intersymbol interference present when the impulse response of the echo channel is longer than the cyclic prefix. Implementation aspects for symmetric and asymmetric DMT-based systems are described together with ways to lower the computational complexity. Finally, computer simulation results are presented that ...
Tópico(s): Advanced Wireless Communication Techniques
2011 - Institute of Electrical and Electronics Engineers | IEEE Signal Processing Letters
Rohit Gaikwad, Richard G. Baraniuk,
... present a framework for maximizing the capacity of symmetric bit-rate communication services dominated by Gaussian crosstalk, in particular, digital subscriber line (DSL) services. We solve for optimal transmit power ...
Tópico(s): Advanced Wireless Network Optimization
2004 - IEEE Communications Society | IEEE Transactions on Communications
... the perspective of metallic access networks utilizing homogeneous symmetric lines as a transmission medium. This miscellaneous environment has a strong influence on transmitted Digital Subscriber Line (DSL) signals and hence it is necessary to know its specific parameters in the given case. Fast and precise measurements on homogeneous symmetric lines are still essential, meaningful and imperative for ...
Tópico(s): Millimeter-Wave Propagation and Modeling
2024 - Multidisciplinary Digital Publishing Institute | Applied Sciences
K.J. Kerpez, D.L. Waring, S. Gaili, J.L. Dixon, P. Madon,
Today's digital subscriber line deployments are often conservatively engineered to function in a statistically worst case environment. Crosstalk is treated as ...
Tópico(s): Electromagnetic Compatibility and Noise Suppression
2003 - Institute of Electrical and Electronics Engineers | IEEE Communications Magazine
M. K. Weldon, Thierry van Landegem, Edward S. Szurkowski,
... across many dimensions. For example, central office asymmetric digital subscriber line 2 (ADSL2+)-centric copper networks are rapidly evolving to remote node-based very high speed digital subscriber line 2 (VDSL2)-based deployments as well as ...
Tópico(s): IPv6, Mobility, Handover, Networks, Security
2008 - Wiley | Bell Labs Technical Journal
Discrete multi-tone (DMT) based digital subscriber loop (DSL) modems must allocate power and information bits to the discrete tones for quadrature amplitude modulation. The bit allocation (also ...
Tópico(s): Advanced Wireless Communication Techniques
2002 - IEEE Communications Society | IEEE Transactions on Communications
... popular distributed iterative waterfilling algorithm (IWFA) for arbitrary symmetric interference environment and for certain asymmetric channel conditions ... any number of users. In the case of symmetric interference crosstalk coefficients, we show that the users ...
Tópico(s): Wireless Communication Networks Research
2006 - Springer Science+Business Media | EURASIP Journal on Advances in Signal Processing
J.M. Cioffi, Vladimir Oksman, Jean-Jacques Werner, T. Pollet, P. Spruyt, J.S. Chow, K.S. Jacobsen,
... band interference ingress and egress, impulse noise, and symmetric and asymmetric multiplexing are included, along with brief ...
Tópico(s): Wireless Communication Networks Research
1999 - Institute of Electrical and Electronics Engineers | IEEE Communications Magazine
Yoshiaki Tanaka, Hirofumi Tsuchiya,
... the local switching system, the number of output subscriber lines is much larger than the number of input trunk lines. Therefore, an asymmetric broadcast ATM switching network is needed for this service. However, most of the switching networks already proposed are symmetric. In this paper, an asymmetric switching network is ...
Tópico(s): graph theory and CDMA systems
1994 - Wiley | Electronics and Communications in Japan (Part I Communications)
Ramandeep Kaur, Simranjit Singh,
Passive optical network broadcasts extensive data to subscribers. However, they are vulnerable to various security attacks. The main objective of our work is to assess the information security aspects at the ... exclusive-OR gate. The proposed simulation architecture of symmetric 80-Gbps NG-PON2 is based on array ...
Tópico(s): Advanced Fiber Laser Technologies
2020 - SPIE | Optical Engineering