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1. 发明专利

GB2404824A Mobile station loop-back signal processing 未知
公开(公告)号：GB2404824A
公开(公告)日：2005-02-09
申请号：GB0424647
申请日：2003-04-25
申请人： ERICSSON INC
发明人： DENT PAUL W , ZANGI KAMBIZ , KRASNY LEONID
IPC分类号： H04B1/707 , H04B7/005 , H04B7/02 , H04B7/06 , H04L1/00 , H04L1/16 , H04L25/02 , H04L25/03 , H04L27/36 , H04L1/24 , H04Q7/32 , H04Q7/38
摘要： Processing of loop-back information returned by one or more mobile stations that are served by a wireless communication network permits the network to compensate its transmit signals for increased transmission efficiency and reduced signal interference at the mobile stations. Generally, the network forms one or more transmit signals as a combination of different signals intended for the different mobile stations, and remembers transmit information associated with these transmit signals. The mobile stations return loop-back signals to the network, which determines transmit signal compensation information by comparing loop-back information to memorized information. The mobile stations may loop-back samples from composite received signals, from processed received signal samples, or loop-back estimates. In the first case, processing at the network involves compensating the combined transmit signals at the transmit modulation rate, while the second case involves symbol rate processing of the individual information streams intended for the different mobile stations.

2. 发明专利

TR200102153T2 未知
公开(公告)号：TR200102153T2
公开(公告)日：2001-12-21
申请号：TR200102153
申请日：1999-12-29
申请人： ERICSSON INC
发明人： CHENNAKESHU SANDEEP , ZANGI KAMBIZ , BOTTOMLEY GREGORY E
IPC分类号： H04L27/01 , H04L25/03 , H04L27/00
摘要： The present invention involves demodulation of radio signals modulated with M-ary modulation in the presence of intersymbol interference distortion. The invention presents a method for reducing the number of multiplications needed to implement a maximum-likelihood-sequence-estimation (MLSE) equalizer for signals modulated with M-ary modulation. In exemplary embodiments of the present invention, the number of multiplications is reduced by pre-computing certain values needed for the determination of the branch metric and storing these pre-computed values in a product table. When a branch metric computation is to be made, whether it is an Euclidean branch metric computation or an Ungerboeck branch metric computation, certain multiplication operations are replaced by simple table look-up operations. As a result, the power efficiency and speed of the system are increased. Any receiver that demodulates signals that are modulated with M-ary modulation can be implemented using the present invention. The resulting demodulator will have a lower complexity than existing demodulators.

3. 发明专利

AU2791901A Methods and systems for decoding symbols by combining matched-filtered samples with hard symbol decisions 未知
公开(公告)号：AU2791901A
公开(公告)日：2001-08-20
申请号：AU2791901
申请日：2001-01-16
申请人： ERICSSON INC
发明人： DENT PAUL W , ZANGI KAMBIZ
IPC分类号： H04L25/03
摘要： Multibit symbols from a signal that is received on a communications channel are decoded by combining a matched filtered signal that is derived from input signal samples, and hard decisions that are derived from the input signal samples, in order to obtain soft symbol values. MLSE-PSP processing may be performed on prefiltered input signal samples to obtain the hard decisions. The original, unprefiltered input signal samples also may be match filtered to determine improved soft information, to thereby allow the symbol decisions to be refined over and the above the result provided by MLSE-PSP. The soft symbol values then may be processed to obtain soft bit values for each bit of the multibit symbols. In particular, the soft symbol values may be converted to soft bit values and interleaved to provide soft, coded bit values. Error correction decoding then may be applied to the soft, coded bit values to provided the decoded bits.

4. 发明专利

ES2366814T3 ESTIMACION DE CANAL POR CUADRADOS MINIMOS CON CORRECCION DE RUIDO COLOREADO. 未知
公开(公告)号：ES2366814T3
公开(公告)日：2011-10-25
申请号：ES07115021
申请日：2001-01-18
申请人： ERICSSON INC
发明人： ZANGI KAMBIZ , RAMESH RAJARAM , HUI DENNIS
IPC分类号： H04L25/02
摘要： Un método para recibir una señal de comunicación sujeta a ruido coloreado por un canal de comunicación, comprendiendo el método los pasos de: recibir la señal de comunicación que incluye el ruido coloreado (bloque 500); determinar una estimación de canal para el canal de comunicación basado en la señal recibida, información predeterminada asociada con la señal recibida y una autocorrelación del ruido coloreado (bloques 505-532); generar una estimación para la señal recibida usando la estimación determinada de canal (bloque 535); y caracterizado porque el paso de determinar una estimación de canal para el canal de comunicación comprende los pasos de: generar una pluralidad de estimaciones candidatas de canal, en el que cada una de la pluralidad de estimaciones candidatas de canal, está basada en una de una pluralidad de autocorrelaciones candidatas (bloques 500-530); y seleccionar una de la pluralidad de estimaciones candidatas de canal como la estimación de canal (bloques 530-532).

5. 发明专利

DE69810335D1 未知
公开(公告)号：DE69810335D1
公开(公告)日：2003-01-30
申请号：DE69810335
申请日：1998-10-14
申请人： ERICSSON INC
发明人： CAMP O , ZANGI KAMBIZ , RAMESH RAJARAM
IPC分类号： G01S1/00 , G01S5/00 , G01S5/02 , G01S19/06 , G01S19/08 , G01S19/13 , G01S19/21 , G01S19/25 , G01S19/37 , H04B7/26 , H04W64/00 , G01S5/14 , G01S1/04
摘要： A Global Positioning System (GPS) receiver located at a base station of a cellular telephone network determines the location of the base station and obtains GPS ephemeris and, if available, timing information. A server uses the obtained information to calculate auxiliary information for use by a GPS receiver. The base station transmits the auxiliary information to the GPS receiver which is located within a cellular telephone operating within the service area of the base station. The cellular telephone GPS receiver uses the auxiliary information to determine the location of the cellular telephone and transmits location information to the cellular telephone network via the cellular telephone and the base station.

6. 发明专利

NO20001960A 未知
公开(公告)号：NO20001960A
公开(公告)日：2000-06-15
申请号：NO20001960
申请日：2000-04-14
申请人： ERICSSON INC
发明人： CAMP JR WILLIAM O , ZANGI KAMBIZ , RAMESH RAJARAM
IPC分类号： G01S1/00 , G01S5/00 , G01S5/02 , G01S19/06 , G01S19/08 , G01S19/13 , G01S19/21 , G01S19/25 , G01S19/37 , H04B7/26 , H04W64/00 , G01S5/14 , G01S1/04
CPC分类号： G01S5/0036 , G01S5/0027 , G01S19/06 , G01S19/25 , G01S2205/008

7. 发明专利

NO20001960D0 未知
公开(公告)号：NO20001960D0
公开(公告)日：2000-04-14
申请号：NO20001960
申请日：2000-04-14
申请人： ERICSSON INC
发明人： CAMP JR WILLIAM O , ZANGI KAMBIZ , RAMESH RAJARAM
IPC分类号： G01S1/00 , G01S5/00 , G01S5/02 , G01S19/06 , G01S19/08 , G01S19/13 , G01S19/21 , G01S19/25 , G01S19/37 , H04B7/26 , H04W64/00 , G01S
摘要： A Global Positioning System (GPS) receiver located at a base station of a cellular telephone network determines the location of the base station and obtains GPS ephemeris and, if available, timing information. A server uses the obtained information to calculate auxiliary information for use by a GPS receiver. The base station transmits the auxiliary information to the GPS receiver which is located within a cellular telephone operating within the service area of the base station. The cellular telephone GPS receiver uses the auxiliary information to determine the location of the cellular telephone and transmits location information to the cellular telephone network via the cellular telephone and the base station.

8. 发明专利

AU1086499A Reduced global positioning system receiver code shift search space for a cellular telephone system 未知
公开(公告)号：AU1086499A
公开(公告)日：1999-05-03
申请号：AU1086499
申请日：1998-10-14
申请人： ERICSSON INC
发明人： CAMP WILLIAM O JR , ZANGI KAMBIZ , RAMESH RAJARAM
IPC分类号： G01S1/00 , G01S5/00 , G01S5/02 , G01S19/06 , G01S19/08 , G01S19/13 , G01S19/21 , G01S19/25 , G01S19/37 , H04B7/26 , H04W64/00 , G01S5/14 , G01S1/04
摘要： A Global Positioning System (GPS) receiver located at a base station of a cellular telephone network determines the location of the base station and obtains GPS ephemeris and, if available, timing information. A server uses the obtained information to calculate auxiliary information for use by a GPS receiver. The base station transmits the auxiliary information to the GPS receiver which is located within a cellular telephone operating within the service area of the base station. The cellular telephone GPS receiver uses the auxiliary information to determine the location of the cellular telephone and transmits location information to the cellular telephone network via the cellular telephone and the base station.

9. 发明专利

AT412296T 未知
公开(公告)号：AT412296T
公开(公告)日：2008-11-15
申请号：AT01908631
申请日：2001-01-18
申请人： ERICSSON INC
发明人： HUI DENNIS , ZANGI KAMBIZ , RAMESH RAJAREM
IPC分类号： H04L25/02
摘要： Methods, systems and receiver devices are provided which may provide improved receiver performance in obtaining estimates of the complex-valued baseband channel in the presence of colored baseband noise. In various embodiments of the present invention, systems and methods are provided in which, over each synchronization signal period or other determinate information window, the channel coefficients and the color of the baseband noise are concurrently estimated. Thus, both the channel coefficients and the color of the noise are estimated, rather than assuming white noise, and channel coefficients may be provided that account for the color of the noise These estimates may be provided for each burst of a communication and may result in an improved channel estimate in the presence of colored noise. The baseband noise can become colored due to, for example, having a non-Nyquist receive filter, due to the presence of a colored co-channel interferer, or due to the presence of an adjacent channel interferer. The concurrent estimates of the color of the noise and channel coefficients may be provided iteratively or by selection of a best result among a plurality of candidate noise color assumptions.

10. 发明专利

CA2306380C REDUCED GLOBAL POSITIONING SYSTEM RECEIVER CODE SHIFT SEARCHSPACE FOR A CELLULAR TELEPHONE SYSTEM 未知
公开(公告)号：CA2306380C
公开(公告)日：2005-03-29
申请号：CA2306380
申请日：1998-10-14
申请人： ERICSSON INC
发明人： CAMP WILLIAM O JR , RAMESH RAJARAM , ZANGI KAMBIZ
IPC分类号： G01S1/00 , G01S5/00 , G01S5/02 , G01S19/06 , G01S19/08 , G01S19/13 , G01S19/21 , G01S19/25 , G01S19/37 , H04B7/26 , H04W64/00 , G01S5/14 , G01S1/04
摘要： A Global Positioning System (GPS) receiver located at a base station of a cellular telephone network determines the location of the base station and obtains GPS ephemeris and, if available, timing information . A server uses the obtained information to calculate auxiliary information for use by a GPS receiver. The base station transmits the auxiliary information to the GPS receiver which is located within a cellular telephone operating within the service area of the base station. Th e cellular telephone GPS receiver uses the auxiliary information to determine the location of the cellular telephone and transmits location information to the cellular telephone network via the cellular telephone and the base station.

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