System and method for increasing throughput in a multiuser...

Pulse or digital communications – Systems using alternating or pulsating current

Reexamination Certificate

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C375S267000, C342S361000

Reexamination Certificate

active

10414738

ABSTRACT:
The present invention is a digital communication method that increases the overall throughput of a Multiuser Detection (MUD)-based co-channel multiple access (MA) system in terms of the total number of bits transmitted through the shared medium by all the users of the MA system if signals are allowed to interfere. The total number of users can be increased if more dimensions are used for assigning the transmitted signals and the same dimensions are measured at the receiver. Specifically, the present invention does not require any coordination among transmitters but simply requires a transmitter to send its signal with either a randomly chosen polarization ellipse, or an assigned or randomly chosen amplitude level.

REFERENCES:
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patent: 6122269 (2000-09-01), Wales
patent: 2003/0026356 (2003-02-01), Brommer
Correal et al., “Enhanced DS-CDMA uplink performance through base station polarization diversity and multistage interference cancellation”, GLOBECOM 98. The Bridge to Global Integration. IEEE Global Telecommunications Conference, 1998, vol. 4, Nov. 8-12, 1998 pp. 1905-1910 vol. 4.
Djonin, “Asymptotical analysis of the optimal spreading sequence allocation in flat fading channels”, Vehicular Technology Conference, 2002 Proceedings, VTC 2002-Fall. 2002 IEEE 56th vol. 1, Sep. 24-28, 2002 pp. 582-585.
European Search Report dated Jul. 12, 2004 of European Application No. EP 04 07 6077 filed Apr. 6, 2004.
G. Mazzini, “Power Division Multiple Access”, Universal Personal Communications, 1998 ICUPC '98, XP010314962, US, ISBN: 0-7803-5106-1, pp. 543-546.
D. Djonin, et al., “Asymptotic Analysis of the Conventional Decision Feedback Receiver in Flat Fading Channels”, 2002 IEEE, XP010589712, US, ISBN: 0-7803-7400-2, Apr. 28, 2002, vol. 1 of 5, pp. 1368-1372.
N. Correal, et al., “Evaluation of Dual Spatial and Polarization Diversity Reception for DS-CDMA Multiuser Detection”, Universal Personal Communications, 1998, IEEE, Oct. 5, 1998, US, ICUPC '98, XP010315021, US, ISBN: 0-7803-5106-1, pp. 789-793.
C. Degen, “Performance Evaluation of MIMO Systems Using Dual-Polarized Antennas”, XP010638021, ICT-2003, vol. 2, Feb. 23, 2003, pp. 1520-1525.

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