Zobrazeno 1 - 10
of 136
pro vyhledávání: '"W.G. Chambers"'
Publikováno v:
IEEE Transactions on Multimedia. 7:551-562
We propose an efficient uplink media access control (MAC) protocol for a variable spreading gain interference-limited wideband CDMA system. It can, with high spectral efficiency, support both real-time traffic like speech and video and also nonreal-t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::570a12c53b2bdc63f43283215d200b3f
https://doi.org/10.1109/tmm.2005.846786
https://doi.org/10.1109/tmm.2005.846786
Autor:
W.G. Chambers, D. Frey
Publikováno v:
IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing. 46:1445-1448
For original paper see ibid., vol. 40, no. 10, pp. 660-6 (1993). A proposal for using a chaotic system with finite wordlength as a means for encrypting data is criticized on the grounds that some of the proposed schemes are readily attacked in the "c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1049f47cb26ec1606ca2020ce7684c90
https://doi.org/10.1109/82.803486
https://doi.org/10.1109/82.803486
Autor:
Jordi Pérez-Romero, Lin Wang, W.G. Chambers, Abdol Hamid Aghvami, Mischa Dohler, Oriol Sallent
Publikováno v:
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
instname
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
instname
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
An analytical model is developed to investigate integrated CS/PS CDMA cellular systems with SIR-based power control. Because packet data are not very sensitive to delay, a defer-first-transmission transmission mode is usually applied to packet data t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::289597c2daccf6301e7a815542d88994
https://hdl.handle.net/2117/1943
https://hdl.handle.net/2117/1943
Autor:
Simon R. Blackburn, W.G. Chambers
Publikováno v:
IEEE Transactions on Information Theory. 42:1269-1271
Fitzpatrick's algorithm for solving the classical Reed-Solomon key equation is shown to be related to an algorithm for solving the Welch-Berlekamp key equation. It can be made more efficient when decoding binary BCH codes. Its efficiency is about the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c06f0754b61d018f4da3566a70a6456
https://doi.org/10.1109/18.508856
https://doi.org/10.1109/18.508856
Publikováno v:
PIMRC
An analytical model is developed to investigate integrated packet-switching/circuit-switching service CDMA cellular systems. Due to the defer-first-transmission mode, link-level congestion control is essential for packet-data transmission. With conge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ca360b818780bd9787433809845d73f
https://doi.org/10.1109/pimrc.2003.1259226
https://doi.org/10.1109/pimrc.2003.1259226
Autor:
W.G. Chambers, N.F. Zein
Publikováno v:
IEEE Military Communications Conference, 'Bridging the Gap. Interoperability, Survivability, Security'.
A system for acquiring synchronization in a 16000-hop/s covertly coded frequency-hop one-way communications link is simulated to investigate the effect of interference and fading on the acquisition time and the probability of missing the genuine sign
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad96ae97012bed617470715d22135a2d
https://doi.org/10.1109/milcom.1989.104046
https://doi.org/10.1109/milcom.1989.104046
Autor:
W.G. Chambers
Publikováno v:
[Proceedings] Singapore ICCS/ISITA `92.
Tables are given of convolutional codes of rates 1/2, 1/3, and 1/4 and with generator polynomials of degrees from 6 to 15 (constraint lengths from 7 to 16). This is partly with a view to the use of these codes in direct-sequence spread-spectrum syste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f5d256504980ad944fa24895a710dfe
https://doi.org/10.1109/iccs.1992.255163
https://doi.org/10.1109/iccs.1992.255163
Publikováno v:
Proceedings of ICC/SUPERCOMM '96 - International Conference on Communications.
Future mobile communication systems should be able to support a wide range of services with different bit rates. Spread spectrum CDMA techniques have attracted much attention to be employed in such a system. Different techniques of CDMA could be used
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89c5904fe4639ab8ab10000b56dcc52d
https://doi.org/10.1109/icc.1996.535608
https://doi.org/10.1109/icc.1996.535608
Publikováno v:
Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94).
A geometric propagation channel model is presented. This model is used to obtain the channel transfer function and parameters such as coherence bandwidth and multipath spread of the channel. Based on the modelled transfer function and the subsequent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ec725a90847bcb67efa7b5bcd79e162
https://doi.org/10.1109/isssta.1994.379508
https://doi.org/10.1109/isssta.1994.379508
Publikováno v:
PIMRC
The paper describes analysis carried on frequency-selective channels to establish and quantify the performance improvements offered by broadband channels. The work focuses on the two types of diversity, frequency and path, which are offered only by w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76765e592b290ec7f278554696960f6d
https://doi.org/10.1109/wncmf.1994.529179
https://doi.org/10.1109/wncmf.1994.529179