Source: http://www.google.com/patents/US8064944?dq=6,247,130
Timestamp: 2017-10-19 03:50:08
Document Index: 794723112

Matched Legal Cases: ['Application No. 9790120', 'Application No. 99904566', 'Application No. 200710005400', 'Application No. 2', 'Application No. 97198741', 'Application No. 99802312', 'Application No. 99802312', 'Application No. 99802312', 'Application No. 99904566', 'Application No. 99904566', 'Application No. 10', 'Application No. 2000', 'Application No. 2', 'Application No. 200710005400', 'Application No. 9790120', 'Application No. 200710005400']

Patent US8064944 - Power control with signal quality estimation for smart antenna ... - Google Patents
A method for power control with signal quality estimation for smart antenna communications system is described. The method, for example, starts with a transmit power assignment. Receive weight vector determination is carried out with this assigned transmit power, and the new weights used. An estimate...http://www.google.com/patents/US8064944?utm_source=gb-gplus-sharePatent US8064944 - Power control with signal quality estimation for smart antenna communications systems
Publication number US8064944 B2
Application number US 11/377,592
Also published as US7035661, US20070173277
Publication number 11377592, 377592, US 8064944 B2, US 8064944B2, US-B2-8064944, US8064944 B2, US8064944B2
Patent Citations (180), Non-Patent Citations (62), Referenced by (43), Classifications (7), Legal Events (2)
US 8064944 B2
L i U  w i U * a i U  2 p i U ∑ j ≠ i , j = 1 d L j U  w i U * a j  2 p j U + I i U ≥ SIN R target i U
L i D  w i D * a i D  2 p i D ∑ j ≠ i , j = 1 d L i D  w j D * a i  2 p j D + I i D ≥ SIN R target i D
E [ R ] = 2 σ 2 f ( SIN R ) , where f ( SIN R ) = e - SIN R ∑ l = 0 ∞ Γ ( 3 2 + l ) SIN R l Γ ( 1 2 + l ) l ! , and E [ R 2 ] = 2 σ 2 ( 1 + SIN R ) .
SIN R = A 1 - A = A + A 1 - A , where A = 2 - R _ 4 ( R 2 _ ) 2 .
1. the BS, desiring a connection with a particular SU, sends
2. the selected SU responds by sending a link channel
3. the BS responds to the link channel establishment request
4. the selected SU switches to the assigned LCH and transmits
5. upon successful detection of a synchronization signal
G ii p i ∑ j ≠ i G ij p j + σ i 2 ≥ SIN R target i . ( 2 )
p i U ( K + 1 ) = f U ( { p i U ( J ) } J = 1 K , { SIN R i U ( J ) _ _ } J = 1 K , SIN R target i U ) ,
where ƒU is some function. In one embodiment, the function ƒU includes only the most recent (i.e., Kth) and the previous to most recent (i.e., (K−1)'th) SINR estimate and only the most recent applied power. That is,
p i U ( K + 1 ) = f U ( p i U ( K ) , SIN R i U ( K - 1 ) _ _ , SIN R i U ( K ) _ _ , SIN R target i U ) .
p i U ( K + 1 ) = f U ( p i U ( K ) , SIN R i U ( K ) _ _ , SIN R target i U ) .
p i D ( K + 1 ) = f D ( { p i D ( J ) } J = 1 K , { SIN R i D ( J ) _ _ } J = 1 K , SIN R target i D ) ,
where ƒD is some other function. In one embodiment, the function ƒU includes only the most recent (Kth) and the previous to most recent (i.e., (K−1)'th) SINR estimate and only the most recently applied power. That is,
p i D ( K + 1 ) = f D ( p i D ( K ) , SIN R i D ( K - 1 ) _ _ , SIN R i D ( K ) _ _ , SIN R target i D ) .
p i D ( K + 1 ) = f D ( p i D ( K ) , SIN R i D ( K ) _ _ , SIN R target i D ) .
p i D ( K + 1 ) = ( SIN R target i D SIN R i D ( K ) _ _ ) μ p i D ( K ) ( 3 a ) and p i U ( K + 1 ) = ( SIN R target i U SIN R i U ( K ) _ _ ) μ p i U ( K ) , ( 3 b )
L i D  w i D * a i D  2 p i D ∑ j ≠ i , j = 1 d L i D  w j D * a i  2 p j D + I i D ≥ SIN R target i D , ( 7 a )
L i U  w i U * a i U  2 p i U ∑ j ≠ i , j = 1 d L j U  w i U * a j  2 p j U + I i U ≥ SIN R target i U , ( 8 a )
where SINRi D and SINRi U respectively are the downlink and uplink estimated signal to interference-plus-noise ratio experienced by the ith subscriber unit and its associated base station (using the methods previously described as in Equation (19) and (20) and FIGS. 5 and 6), and the pi D and pi U are the known downlink and uplink transmit power used by the base station associated with the ith subscriber and base station associated with the ith subscriber during each of the last transmitted bursts.
L i D  w i D * a i D  2 p i D - SINR target i 2 ∑ j ≠ i , j = 1 d L i D  w j D * a i  2 p j D = I i D SINR target i D ( 12 a )
E [ R ] = 2 σ 2 f ( SINR ) , where f ( SINR ) = ⅇ - SINR ∑ l = 0 ∞ Γ ( 3 2 + l ) SINR l Γ ( 1 2 + l ) l ! , and ( 15 ) E [ R 2 ] = E [ S 2 ] + 2 σ 2 = 2 σ 2 ( 1 + SINR ) . ( 16 )
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Cooperative Classification H04W52/42, H04B7/0848