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s1(t) =iΣ bi,1 ÿ (t − iT )

H1( f ) + y(t)Detector

{ bi,k}

{ k = 1, . . . ,K }

HK ( f )sK (t) =

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−5

0

5

10

15

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aver

aged

SIN

R

decision−directed LS

blind LS

blind stochastic gradient

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X5 

0 50 100 150 200 250 300 350 400−10

−8

−6

−4

−2

0

2

4

6

8

time

aver

aged

SIN

R

RLS with ramp

RLS

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X5Ê

0 100 200 300 400 500 600 700 800 900 10001

10

20

Subspace-based blind adaptive multiuser detector

RLS minimum-output-energy blind adaptive multiuser detector

Number of Iterations

Tim

e Av

erag

ed S

IR (d

B)

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