Equalization method and device of the GMMSE type

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

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C375S148000, C370S335000

Reexamination Certificate

active

07058115

ABSTRACT:
An equalization method and apparatus for a downlink channel in a telecommunication system transmitting MC-CDMA symbols on a plurality of carrier frequencies, in which a plurality of links are established between a transmitter and a plurality of receivers in order to transmit a plurality of coded signals, each link using a distinct access code amongst N possible codes, there being P links for P users where P is less than N. The equalization including the formation and use of a matrix of reduced size based upon the number of links being P by eliminating matrix elements relating to the unused codes and effecting an estimation of the said transmitted symbols according to a mean square error minimization criterion.

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Thomas P. Krauss, William J. Hillery and Michael D. Zoltowski, “MMSE equalisation for forward link in 3G CDMA: symbol-level versus chip-level”, Aug. 14-16, 2000, IEEE, Statistical Signal and Array Processing, 2000. Proceedings of Workshop on, 18-22.

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