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1. 发明专利

BRPI9906840B1 unidade de estimação de retardo, receptor, e, processo para estimar retardos 未知
公开(公告)号：BRPI9906840B1
公开(公告)日：2017-05-30
申请号：BR9906840
申请日：1999-01-12
申请人： ERICSSON INC
发明人： ESSAN SOUROUR , GREG BOTTOMLEY , RAJARAM RAMESH , SANDEEP CHENNAKESHU
IPC分类号： H04B1/707 , H04B1/711 , H04B1/709 , H04B1/7113 , H04B7/26
摘要： "unidade de estimação de retardo, receptor, e, processo para estimar retardos". estimação de retardo de multi-trajeto de um sinal de espectro espalhado de seqüência direta (ds-ss) transmitido em um canal de desvanecimento por multi-trajeto e efetuada medindo o envelope do sinal para uma nova estimativa de retardo. estimativas de retardo são também obtidas em ordem de intensidade de raia, subtraindo a influencia das raias mais fortes nas mais fracas. esta abordagem de subtração pode ser realizada iterativamente, permitindo adicional refinamento das estimativas de retardo. estimativas de retardo podem também ser determinadas minimizando o erro médio quadrático (mse) entre uma função de correlação medida e uma função de correlação modelada. a abordagem de erro médio quadrático mínimo (mmse) pode ser realizada iterativamente, para adicionalmente refinar as estimativas de retardo. estimativas de retardo de probabilidade máxima (ml) podem também ser obtidas explorando informação lateral relativa a formas de pulso de transmissão e recepção.

2. 发明专利

HK1040468B 用於CDMA接收機的導頻强度測量與多徑延遲搜索器未知
公开(公告)号：HK1040468B
公开(公告)日：2005-07-22
申请号：HK02101720
申请日：2002-03-06
申请人： ERICSSON INC
发明人： ESSAM ABDELFATTAH SOUROUR , GREG BOTTOMLEY , RAJARAM RAMESH
IPC分类号： H04B1/7115 , H04B7/26 , H04B17/00 , H04Q7/36

3. 发明专利

HK1042392B 收發信機和接收信號的方法未知
公开(公告)号：HK1042392B
公开(公告)日：2004-10-08
申请号：HK02104030
申请日：2002-05-30
申请人： ERICSSON INC
发明人： RAJARAM RAMESH , YI-PIN ERIC WANG
IPC分类号： H04J13/00 , H04L20060101 , H04B20060101 , H04B7/005 , H04L25/02

4. 发明专利

MY116315A METHOD AND APPARATUS FOR CHANNEL TRACKING 未知
公开(公告)号：MY116315A
公开(公告)日：2003-12-31
申请号：MYPI19985938
申请日：1998-12-30
申请人： ERICSSON INC
发明人： RAJARAM RAMESH , KARL MOLNAR , GREG BOTTOMLEY
IPC分类号： H04B1/10 , H04B1/707 , H04L27/01 , H04B3/04 , H04B3/06 , H04B7/005 , H04L25/02 , H04L25/03 , H04Q7/38
摘要： A METHOD AND APPARATUS FOR CHANNEL TRACKING IS DISCLOSED WHEREIN PULSE-SHAPING INFORMATION IS USED TO IMPROVE CHANNEL TRACKING PERFORMANCE. INFORMATION SYMBOL VALUES ARE PREFILTERED USING THE PULSE SHAPE INFORMATION FOR A RECEIVED BASEBAND SIGNAL TO GENERATE A FILTERED WAVEFORM. THE FILTERED WAVEFORM PROVIDES A REFERENCE SIGNAL FOR A MEDIUM RESPONSE ESTIMATION. THE ESTIMATED MEDIUM RESPONSE IS USED WITH A COHERENT DETECTOR (110) TO DETECT UNKNOWN INFORMATION SYMBOLS WITHIN THE BASEBAND SIGNAL. MEDIUM RESPONSE ESTIMATES CAN BE DETERMINED FOR A SINGLE DETECTED SYMBOL SEQUENCE OR FOR EACH HYPOTHESIZED SYMBOL SEQUENCE. FIGURE 1

5. 发明专利

MY123614A METHODS, RECEIVERS AND EQUALIZERS HAVING INCREASED COMPUTATIONAL EFFICIENCY. 未知
公开(公告)号：MY123614A
公开(公告)日：2006-05-31
申请号：MYPI20010522
申请日：2001-02-06
申请人： ERICSSON INC
发明人： RAJARAM RAMESH , DENNIS HUI , KAMBIZ C ZANGI , JUNG-FU CHENG
IPC分类号： H03D1/04 , H04L25/03
摘要： METRICS ASSOCIATED WITH EACH BRANCH FROM A PREVIOUS HYPOTHESIZED TRELLIS STATE TO EACH RESPECTIVE POSSIBLE CURRENT TRELLIS STATE IN A DFSE EQUALIZER CAN BE CALCULATED. IN PARTICULAR, A COMMON PORTION OF BRANCH METRICS CAN BE CALCULATED THAT IS COMMON TO EACH OF THE BRANCH METRICS FROM THE PREVIOUS HYPOTHESIZED STATE TO EACH OF THE CURRENT POSSIBLE STATE, AND DIFFERENCE VARIABLES REPRESENTING A DIFFERENCE BETWEEN THE COMMON PORTION OF THE BRANCH METRICS AND EACH OF THE BRANCH METRICS FROM THE PREVIOUS HYPOTHESIZED STATE TO EACH OF THE CURRENT POSSIBLE STATES CAN ALSO BE CALCULATED.THE COMMON PORTION OF THE BRANCH METRIC AND EACH OF THE DIFFERENCE VARIABLES CAN THEN BE COMBINED TO PROVIDE A RESPECTIVE METRIC FOR EACH OF THE POSSIBLE CURRENT STATES.(FIG 3)

6. 发明专利

HK1040855B 從差分編碼的接收信號中產生差分值的方法及其系統未知
公开(公告)号：HK1040855B
公开(公告)日：2004-05-21
申请号：HK02102218
申请日：2002-03-22
申请人： ERICSSON INC
发明人： HUSEYIN ARSLAN , GREGORY E BOTTOMLEY , RAJARAM RAMESH
IPC分类号： H04L20060101 , H04L25/03

7. 发明专利

ID24595A 未知
公开(公告)号：ID24595A
公开(公告)日：2000-07-27
申请号：ID991428
申请日：1998-04-02
申请人： ERICSSON INC
发明人： IRVIN DAVID R , RAJARAM RAMESH , KARL MOLNAR
IPC分类号： G01S1/04 , G01S5/06 , H04W64/00 , H04Q7/38

8. 发明专利

EE9900502A 未知
公开(公告)号：EE9900502A
公开(公告)日：2000-06-15
申请号：EEP9900502
申请日：1998-04-02
申请人： ERICSSON INC
发明人： DAVID R IRWIN , RAJARAM RAMESH , KARL MOLNAR
IPC分类号： G01S1/04 , G01S5/06 , H04W64/00 , H04Q7/38

9. 发明专利

MY126646A APPARATUS AND METHODS FOR HIGH-PENETRATION RANDOM ACCESS IN WIRELESS COMMUNICATIONS SYSTEMS 未知
公开(公告)号：MY126646A
公开(公告)日：2006-10-31
申请号：MYPI20001561
申请日：2000-04-13
申请人： ERICSSON INC
发明人： RAJARAM RAMESH , HAVISH KOORAPATY
IPC分类号： H04L12/56 , H04W28/26 , H04W74/04 , H04W74/08 , H04W88/08
摘要： ACCESS IS PROVIDED IN A WIRELESS COMMUNICATIONS SYSTEM INCLUDING AT LEAST ONE BASE STATION OPERATIVE TO COMMUNICATE WITH ONE OR MORE TERMINALS OVER A FORWARD CONTROL CHANNEL AND A REVERSE CONTROL CHANNEL. A HIGH-PENETRATION CHANNNEL RESERVATION STATUS IS TRANSMITTED INDICATOR FROM A BASE STATION IN A PLURALITY OF SLOTS ASSIGNED TO A HIGH- PENETRARION FORWARD CONTROL CHANNEL, SUCH THAT THE HIGH- PENETRATION CHANNEL RESERVATION STATUS INDICATOR HAS A REDUNDANCY GREATER THAN THAT OF A CHANNEL RESERVATION STATUS INDICATOR TRANSMITTED OVER THE FORWARD CONTROL CHANNEL. TRANSMISSION OF THE HIGH-PENETRATION CHANNEL RESERVATION STATUS MAY BE PRECEDED BY TRANSMISSION OF A HIGH-PENETRATION ACCESS REQUEST FROM A TERMINAL IN A PLURALITY OF SLOTS ASSIGNED TO A HIGH- PENETRATION REVERSE CONTROL CHANNEL, SUCH THAT THE HIGH-PENETRATION ACCESS REQUEST HAS A REDUNDANCY GREATER THAN THAT OF AN ACCESS REQUEST TRANSMITTED OVER THE REVERSE CONTROL CHANNEL, AND RECEPTION OF THE HIGH-PENETRATION ACCESS REQUEST AT THE BASE STATION. THE HIGH-PENETRATION CHANNEL RESERVATION STATUS INDICATOR MAY BE TRANSMITTED RESPONSIVE TO RECEIPT OF THE HIGH-PENETRATION ACCESS REQUEST. THE CHANNEL RESERVATION STATUS INFORMATION IS CODED ACCORDING TO AN ERROR CORRECTION CODE, PREFERABLY A COMBINATION OF A CONVOLUTIONAL CODE AND A BLOCK CODE. ACCORDING TO ANOTHER ASPECT, HIGH-PENETRATION HYPERFRAME/SUPERFRAME STRUCTURES ARE UTILIZED. RELATED BASE STATION AND TERMINAL APPARATUS ARE ALSO DISCUSSED. FIG. 6

10. 发明专利

CO5031283A1 APARATO Y METODOS PARA COMPUTACION DE POSICION CON BASE EN LA TRANSMISION DE DATOS DE INICIALIZACION 未知
公开(公告)号：CO5031283A1
公开(公告)日：2001-04-27
申请号：CO99035302
申请日：1999-06-04
申请人： ERICSSON INC
发明人： RAJARAM RAMESH
IPC分类号： G01S1/00 , G01S1/08 , G01S5/00 , G01S5/14 , G01S19/25 , G01S19/41 , G01S19/48
摘要： Un aparato móvil de computación de posición para usodentro de una región atendida por una red de radio comunicación, que comprende:un primer receptor para recibir una transmisión de radio comunicación en la red de radio comunicación;un segundo receptor para recibir mensajes de posicionamiento transmitidos por un satélite de posicionamiento;circuito de computación de posición acoplado al segundo receptor; y medios acoplados a dicho primer receptor para obtener datos de posicionamiento de la transmisión del radio comunicación y para proveer los datos de posicionamiento al circuito de computación de posición para uso en la adquisición del satélite de posicionamiento.1Un método para la adquisición de un satélite de posicionamiento desde dentro el área de cubrimiento de una red de radio comunicación que transmite datos de posicionamiento; el método consiste de los siguientes pasos:recibir los datos de posicionamiento en la red de radio comunicación; y adquirir un satélite de posicionamiento con base en los datos de posicionamiento recibidos.

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