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H(K)F(K)Symbols
Low-rate feedback pathUpdate
Precoder
LinearRx
Form F(k)
Online
Choose F(k)
From codebook
H
Detection
&Decode
=
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>
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Delay
Delay
Q-bit
Quant
Q-bit
Quant
1X
2X
AY
BY
][tA
h
][tB
h
][ tAe
][ tBe
[ ] = [ ] [ ] + [ ], = , ,
[ ] C E[ [ ] [ ]] [ ] CN( , ) [ ] = [ [ ], , [ ]]
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[ ]
C= , , C
[ ] = = , , (( [ ], ))
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( )
( ) := ( )( )
( ) ( ) := ( )
( ) := ( ) ( )( ) =
+ ++
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=
[ ] = [ ] [ ] =
[ ] +
[ ] := ( , )[ ][ ] = [ ] + [ ] := ( , )[ ]
[ ] = [ [ ] [ ]]
[ ] = [ ]
[ ] =
[ ] +
[ ] := ( , )[ ][ ] = [ ] + [ ] := ( , )[ ][ ] = [ [ ] [ ]]
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=
[ ] [ ]
[ ] = [ ( , )[ ], ( , )[ ], ] ( , )[ ] = [ ] + [ ]
( , )[ ] = [ ] + [ ]
[ ] = [ ]( ( , )[ ] + ( , )[ ])
[ ] = [ ]( ( , )[ ] + ( , )[ ])
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[ ][ ][ ]
=
[ ]
[ ]
[ ] [ ] [ ] [ ]
[ ] [ ]
[ ]
[ ]
[ ]
[ ]
=
+
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