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41. 发明授权

EP0944977B8 METHOD AND APPARATUS FOR DIGITAL SYMBOL DETECTION USING TRANSMISSION MEDIUM RESPONSE ESTIMATES 失效
标题翻译：使用传输介质响应估计的数字符号检测方法和设备
公开(公告)号：EP0944977B8
公开(公告)日：2005-06-29
申请号：EP97949617.1
申请日：1997-12-05
申请人： Ericsson Inc.
发明人： BOTTOMLEY, Gregory, E. , MOLNAR, Karl , RAMESH, Rajaram
IPC分类号： H04L25/03 , H04B1/707
CPC分类号： H04B1/707 , H04B7/005 , H04L25/0202 , H04L25/03178 , H04L25/03299
摘要： According to the present invention, the effects of the transmission medium on transmitted information symbols are estimated separately from other effects, e.g., those associated with receive and transmit filters, using knowledge of the pulse shaping. The medium response estimate is then used to detect information symbols. Previously, receivers had used estimates of the composite channel to detect symbols. This, however, assumed uncorrelated noise, which is not always the case.
摘要翻译：根据本发明，利用脉冲整形的知识，将传输介质对传输的信息符号的影响与其他影响（例如与接收和发射滤波器相关的影响）分开估算。媒体响应估计然后用于检测信息符号。以前，接收机已经使用复合信道的估计来检测符号。然而，这却假设了不相关的噪音，但情况并非总是如此。

42. 发明授权

EP1142244B1 METHOD AND SYSTEM FOR THE TRANSMISSION, RECEPTION AND PROCESSING OF 4-LEVEL AND 8-LEVEL SIGNALING SYMBOLS 有权
标题翻译：方法和系统，以便传输到接收和处理4和8级信令图标
公开(公告)号：EP1142244B1
公开(公告)日：2005-06-01
申请号：EP99961823.4
申请日：1999-11-24
申请人： Ericsson Inc.
发明人： DENT, Paul, W. , RAMESH, Rajaram
IPC分类号： H04L27/00 , H04L27/18
CPC分类号： H04L27/186 , H04L27/0008
摘要： A method and system for the transmission, reception, and processing of 4-level and 8-level signaling symbols is provided. An inventive modulator is provided for modulating 4-level signaling symbols using an 8-level modulator. Further, this inventive modulator is able to produce 4-level modulation when modulating 4-level signaling symbols using an 8-level modulator, where the 4-level modulation represents the 4-level symbol sequence modulated. Further, a constrained/unconstrained demodulator is provided which is able to demodulate both 4-level signaling symbols and 8-level signaling symbols. The inventive demodulator accomplishes this by limiting the number of new symbol hypotheses and path histories to 4 when working with 4-level signaling symbols, and setting the number of new symbol hypotheses and path histories to 8 when working with 8-level signaling symbols. Additionally, an error correction decoder is provided which is also able to decode a demodulated signal which contains both 4-level and 8-level signaling symbols. The inventive error correction decoder accomplishes this by utilizing an interleaver that only places bits in the 2-bit positions of the 3-PSK soft values that correspond to the 2-bits of QPSK to decode 4-level signalling symbols, and utilizing an interleaver that places bits in all three of the possible bit positions of a symbol to decode 8-level signalling symbols.

43. 发明授权

EP0927362B1 POSITION DETERMINATION USING MULTIPLE BASE STATION SIGNALS 失效
标题翻译：定位的多个基站信号来
公开(公告)号：EP0927362B1
公开(公告)日：2004-03-24
申请号：EP97943319.0
申请日：1997-09-19
申请人： Ericsson Inc.
发明人： MOLNAR, Karl , RAMESH, Rajaram , HASSAN, Amer, Aref , MOLNAR, Barbara
IPC分类号： G01S5/04 , G01S3/28
CPC分类号： G01S5/14 , G01S3/146 , G01S3/28 , G01S5/04 , G01S5/12 , H01Q1/246 , H01Q21/08 , H01Q21/28 , H04B7/0837 , H04B7/0851 , H04B7/10 , H04B7/18515 , H04B7/18532 , H04B7/18545 , H04B7/18567 , H04L1/0069 , H04L1/0071 , H04L1/06 , H04L25/03331 , H04L2001/0098 , H04W16/28 , H04W64/00

44. 发明授权

EP1084538B1 PILOT STRENGTH MEASUREMENT AND MULTIPATH DELAY SEARCHER FOR CDMA RECEIVER 有权
标题翻译： PILOT液面测量和更有范传输时间搜索CDMA接收机
公开(公告)号：EP1084538B1
公开(公告)日：2003-04-23
申请号：EP99935316.2
申请日：1999-06-11
申请人： ERICSSON INC.
发明人： SOUROUR, Essam, Abdelfattah , BOTTOMLEY, Greg , RAMESH, Rajaram
IPC分类号： H04B17/00 , H04B1/707
CPC分类号： H04B17/318 , H04B1/7115

45. 发明授权

EP1023612B1 REDUCED GLOBAL POSITIONING SYSTEM RECEIVER CODE SHIFT SEARCH SPACE FOR A CELLULAR TELEPHONE SYSTEM 有权
标题翻译： KODESPRUNGSUCHRAUM以降低GPS接收机在蜂窝电话系统
公开(公告)号：EP1023612B1
公开(公告)日：2002-12-18
申请号：EP98953512.5
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： G01S5/14 , G01S1/04 , G01S5/00
CPC分类号： G01S5/0036 , G01S5/0027 , G01S19/06 , G01S19/25 , G01S2205/008

46. 发明授权

EP1075736B1 TRANSMIT DIVERSITY METHODS, SYSTEMS, AND TERMINALS USING SCRAMBLE CODING 有权
标题翻译：发送分集方式，系统和设备与SCRAMBLER CODING
公开(公告)号：EP1075736B1
公开(公告)日：2001-12-19
申请号：EP99915107.9
申请日：1999-03-30
申请人： ERICSSON INC.
发明人： KHAYRALLAH, Ali, S. , ZANGI, Kambiz, C. , RAMESH, Rajaram
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0669 , H04L1/0618

47. 发明公开

EP1153491A1 SYSTEM AND ORTHOGONAL CODING IN A TELECOMMUNICATIONS ENVIRONMENT USING ORTHOGONAL AND NEAR-ORTHOGONAL CODES 审中-公开
标题翻译：系统和正交编码在电信环境应用正交和NAHEZUORTHOGONALEN KODEN
公开(公告)号：EP1153491A1
公开(公告)日：2001-11-14
申请号：EP00907233.1
申请日：2000-02-09
申请人： ERICSSON INC.
发明人： BALACHANDRAN, Kumar , RAMESH, Rajaram , KOORAPATY, Havish , WANG, Eric , CHENNAKESHU, Sandeep , HASSAN, Amer
IPC分类号： H04J11/00
CPC分类号： H04J13/004 , H04J13/0077 , H04J13/18
摘要： A system and method for permitting variable information rates and improved error performance using orthogonal or near-orthogonal codes is disclosed. This is achieved by simultaneously transmitting two or more Walsh code words from a given orthogonal code set and/or by transmitting multiple shorter orthogonal codewords sequentially such that their combined length equals the original codeword. It should be emphasized that the present invention can be used with any orthogonal or near-orthogonal code set.

48. 发明公开

EP1119921A2 DELAY SEARCHER AND DELAY TRACKERS INTERACTION FOR NEW DELAYS ASSIGNMENT TO RAKE FINGERS 有权
标题翻译：传输时间和搜索延迟-NACHFÜHRINTERAKTION分配的RAKE分支
公开(公告)号：EP1119921A2
公开(公告)日：2001-08-01
申请号：EP99951626.3
申请日：1999-09-28
申请人： ERICSSON INC.
发明人： SOUROUR, Essam , BOTTOMLEY, Gregory, E. , RAMESH, Rajaram
IPC分类号： H04B1/707 , H04L25/02
CPC分类号： H04B1/7117 , H04B1/7113 , H04B1/7115
摘要： A direct sequence spread spectrum receiver for operating in a multipath fading channel comprises a rake receiver having plural rake fingers. Each rake finger demodulates a received signal from one of plural channel paths. The output of the plural rake fingers are combined. Each rake finger utilizes a select assigned delay to synchronize to a delay of the one channel path. A searcher periodically performs a channel search on the received signal to detect new delays of strongest paths in the channel. Plural trackers, one for each channel path, adjust the select assigned delays between searches performed by the searcher. A delay controller is operatively coupled to the searcher and the tracker. The delay controller compares new delays of the strongest paths from the searcher to the select assigned delays and reassigns one of the select assigned delays with one of the new delays only if the new delay differs from the one select assigned delay more than a preselect minimum amount.

49. 发明公开

EP1055294A1 APPARATUS AND METHOD FOR SELECTING BETWEEN A PLURALITY OF ANTENNAS UTILIZED BY A MICROCELLULAR COMMUNICATIONS TERMINAL FOR RECEPTION 审中-公开
标题翻译： DEVICE AND METHOD FOR不同的接收天线在一个微蜂窝通信端子选择
公开(公告)号：EP1055294A1
公开(公告)日：2000-11-29
申请号：EP99905626.0
申请日：1999-02-02
申请人： ERICSSON INC.
发明人： RAMESH, Rajaram , CHENNAKESHU, Sandeep
IPC分类号： H04B7/08
CPC分类号： H04B7/082 , H04B7/0842
摘要： An apparatus and method for selecting between a plurality of antennas utilized by a microcellular communications terminal for reception of a signal, wherein a gain imbalance exists between the antennas.

50. 发明公开

EP1044512A1 A SYSTEM AND METHOD FOR SYNCHRONIZING ACQUISITION FOR A CODE MODULATED COMMUNICATION SYSTEM 审中-公开
标题翻译：系统和方法的一个编码调制通信系统的同步捕获
公开(公告)号：EP1044512A1
公开(公告)日：2000-10-18
申请号：EP98965017.1
申请日：1998-12-30
申请人： Ericsson, Inc.
发明人： SOUROUR, Essam , BOTTOMLEY, Gregory, E. , RAMESH, Rajaram
IPC分类号： H04B1/707
CPC分类号： H04B1/70775 , H04B1/70755
摘要： A system and method for a synchronizing acquisition of a transmitted signal with a local code in a code modulated communication system. The local code is comprised of a replica of the transmitted code. Samples of the transmitted code are correlated with the local code and resulting periodic output samples having indexes are compared with a threshold. Selected indexes of the samples exceeding the threshold are stored and verified for synchronization. Stored correlation indexes which exceed the threshold are combined, and a responder achieves synchronization between transmitted signal and the local code.

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