Multi-user detection method

Details Multi-user detection method Multi-user detection method

2006-04-18

2006-04-18

Tsang, Fan (Department: 2645)

Telecommunications

Transmitter

Diversity

C455S063100, C455S067130

Reexamination Certificate

active

07031671

ABSTRACT:
Multi-user detection method with elimination of interference between users, each user transmitting modulated data in the form of symbols on a transmission channel, each transmission channel (k) comprising at least one propagation path (i) and each propagation path arriving at an array of reception antennae (l) according to a direction of arrival (θi,k), the method comprising at least one sequence of steps for each user (k), each sequence comprising:(a) a reception step (600k,700k,800k,800,900) decomposing each antenna signal into filtered signals (xl,i,k) issuing from the different paths (i) of the said user (k) and combining the said filtered signals by means of a first plurality of coefficients (bl,i,k, ci,k) in order to form an estimation (zk) of the signal transmitted by the user;(b) a step of estimating (670k,770k,870k,870,970) the contribution ((xl,k)l=1. . . L) of the user to the signals received by the different antennae from the said estimation of the signal transmitted and a second plurality of coefficients (ui,k, wl,i,k) obtained from the said first plurality of coefficients;(c) a step of eliminating interference (680k′,780k,880k,880,980) subtracting from the antenna signals the contribution estimated at step (b) in order to obtain cleaned antenna signals;the cleaned antenna signals supplied by at least one first sequence being used as antenna signals by at least one second sequence.

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