公开(公告)号：EP1021883A1

公开(公告)日：2000-07-26

申请号：EP98950803.1

申请日：1998-09-30

申请人： ERICSSON INC.

发明人： DENT, Paul, W.

IPC分类号： H04L1/00 ,  H03M13/00 ,  H04L1/20 ,  H04L25/03

CPC分类号： H04L1/0059 ,  H03M13/27 ,  H04L1/007 ,  H04L1/0071 ,  H04L1/20

摘要： A method and apparatus for protecting a first group of data bits using a second group of data bits within digital data transmissions is disclosed. First and second groups of data bits are encoded for transmission in a communication network. The second group of encoded data bits are scrambled using a scrambling mask generated from the first group of data bits. The first group of encoded data bits and the second group of encoded and scrambled data bits are then interleaved and transmitted to a receiver. The first group of data bits are decoded and used to regenerate the scrambling mask to descramble the second group of encoded and scrambled data bits. The second group of data bits may then be decoded. The results of the decoding of the second group of data bits are used to determine whether or not the first group of data bits were properly decoded.

公开(公告)号：EP0813768B1

公开(公告)日：2000-06-14

申请号：EP96911247.3

申请日：1996-03-01

申请人： ERICSSON INC.

发明人： LINDQUIST, Björn ,  DENT, Paul, W.

IPC分类号： H03D7/16 ,  H04L27/233

CPC分类号： H03D7/165 ,  H03D3/008 ,  H04L25/03273 ,  H04L27/233 ,  H04L2025/03401 ,  H04L2025/03407

公开(公告)号：EP0813775B1

公开(公告)日：1999-09-08

申请号：EP96908521.6

申请日：1996-03-08

申请人： Ericsson Inc.

发明人： RAMESH, Rajaram ,  DENT, Paul, W. ,  REINHOLD, Stanley, L.

IPC分类号： H04B7/185

CPC分类号： H04B7/18515

摘要： A method and apparatus for mobile station-to-mobile station communications in a mobile satellite communications system using an asymmetrical TDMA format is presented. According to the present invention, a first mobile station broadcasts a first signal to an orbiting satellite using a first TDMA format. The satellite receives the first signal, maps the first TDMA format to a second TDMA format and broadcasts a second signal having a second TDMA format to a second mobile station.

公开(公告)号：EP0934667A2

公开(公告)日：1999-08-11

申请号：EP97910000.0

申请日：1997-10-07

申请人： ERICSSON INC.

发明人： DENT, Paul, W.

IPC分类号： H04B7 ,  H01Q1 ,  H01Q25 ,  H04W16

CPC分类号： H04W16/12 ,  H01Q1/246 ,  H01Q25/00 ,  H04W16/02 ,  H04W16/24 ,  H04W16/28 ,  Y02D70/00 ,  Y02D70/1222

摘要： A method and apparatus for improving the reception characteristics for lower-power portable telephone units at a base station site (8) is disclosed. A normal three-sector antenna site (8) is divided into a plurality of sectors each having a central line of focus. The frequency channels assigned to the base station site (8) are divided among the sectors, and an antenna (10) within each sector radiates the assigned frequencies along the central line of focus for each of the sectors.

摘要翻译： 公开了一种在基站（8）提高低功率便携式电话机的接收特性的方法和装置。 正常的三扇区天线位置（8）被分成多个扇区，每个扇区具有中心焦点焦点。 分配给基站站点（8）的频率信道在扇区之间划分，并且每个扇区内的天线（10）沿着每个扇区的沿着焦点中心线辐射分配的频率。

公开(公告)号：EP0914727A1

公开(公告)日：1999-05-12

申请号：EP97934068.0

申请日：1997-07-10

申请人： Ericsson Inc.

发明人： DENT, Paul, W. ,  HAARTSEN, Jacobus, Cornelis

IPC分类号： H04J4 ,  H04B7 ,  H04J3 ,  H04L12 ,  H04M1

CPC分类号： H04B7/2643 ,  H04M1/725 ,  H04M2250/02 ,  H04W72/00

摘要： A short-range wireless radio communications system is provided that can carry data, voice, or data and voice traffic simultaneously. The band is divided into a plurality of channels or hops, and a burst composed of either voice information, data information, or a combination of data and voice information is transmitted during one of the hops. The system operates preferably in a simplex mode, but full duplex operation can also be employed. The present system can also be operated in a cellular, TDMA system. A multiple time slot method is employed whereby one time slot can carry data and another time slot can carry voice information.

公开(公告)号：EP0913040A1

公开(公告)日：1999-05-06

申请号：EP97936964.0

申请日：1997-07-14

申请人： ERICSSON INC.

发明人： DENT, Paul, W.

IPC分类号： H03M13 ,  H04L9

CPC分类号： H04L9/0668 ,  H04L2209/34

摘要： A system and a method for transforming an N-bit input value into a transformed N-bit output value which may be used for error correction coding or ciphering of the N-bit input value. In a representative embodiment, the system comprises means (50-54) for providing a set of all possible N-bit values as a plurality of mutually exclusive subsets each containing at least one possible N-bit value; means (56-60) for comparing the N-bit input value with each of the subsets to determine to which one of the subsets the N-bit input value belongs; and means (64) for selecting as the transformed N-bit output value an N-bit value from another one of the subsets. In accordance with the present invention, each of these subsets may be cyclically generated in a linear feedback shift register (LFSR) or, alternatively, stored in a memory.

公开(公告)号：EP0883932A1

公开(公告)日：1998-12-16

申请号：EP97914762.0

申请日：1997-02-26

申请人： ERICSSON INC.

发明人： DENT, Paul, W.

IPC分类号： H03M1

CPC分类号： H03M1/54

摘要： A low cost, easily manufactured analog to digital converter uses MOS switching technology easily combined on an integrated circuit with other signal processing circuitry. An input capacitor stores an input analog voltage, and a pumping capacitor is switchably connected to the input capacitor to charge or discharge that input capacitor to a reference value. The number of charge or discharge events is used to generate a digital value for the input analog voltage.

公开(公告)号：EP0867077A2

公开(公告)日：1998-09-30

申请号：EP96944835.0

申请日：1996-12-10

申请人： ERICSSON INC.

发明人： DENT, Paul, W.

IPC分类号： H04L27 ,  H04B1 ,  H04J13

CPC分类号： H04B1/7107 ,  H04B1/7101 ,  H04J13/00

摘要： A method and receiver which provides, among other features, for resubtraction of an already subtracted signal in order to eliminate subtraction errors, termed re-orthogonalization, is described herein. According to exemplary embodiments, pairwise combinations of spreading codes are used to despread received composite signals. For example, these pairwise combinations can include a first spreading code associated with a signal that has already been subtracted and a second spreading code associated with a signal which is weaker than that associated with the first spreading code. In this way both resubtraction and subtraction are performed at the same time.

摘要翻译： 本文描述了一种方法和接收机，其除了其它特征之外还提供用于重新提取已经相减的信号以消除相减误差，称为重新正交化。 根据示例性实施例，扩展码的成对组合被用于解扩接收到的复合信号。 例如，这些成对组合可以包括与已经被减去的信号相关联的第一扩频码和与比与第一扩频码相关的信号弱的信号相关联的第二扩频码。 通过这种方式，重新提取和减法都是同时进行的。

公开(公告)号：EP0865692A1

公开(公告)日：1998-09-23

申请号：EP96942727.0

申请日：1996-11-12

申请人： ERICSSON INC.

发明人： DENT, Paul, W.

IPC分类号： H01Q3 ,  H04B7

CPC分类号： H01Q3/26

摘要： A digital beamforming network for transmitting a first number of digital information signal using a second number of antenna array elements is disclosed. Assemblers are used for assembling one information bit selected from each of the information signals into a bit vector. Digital processors have an input for the bit vector and a number of outputs equal to the second number of antenna elements and process the bit vector. Finally, modulation waveform generators coupled to each of the second number of outputs generate a signal for transmission by each antenna element.

公开(公告)号：EP0787381A1

公开(公告)日：1997-08-06

申请号：EP95937309.0

申请日：1995-10-10

申请人： ERICSSON INC.

发明人： DENT, Paul, W.

IPC分类号： H03F1 ,  H03F3

CPC分类号： H03F3/602 ,  H03F1/0244 ,  H03F2200/516 ,  H03F2200/541 ,  H03F2203/30048

摘要： A power amplifier circuit for efficiently generating an output signal into a load at more than one alternative power level has at least two amplifiers, each having optimum efficiency at different power output levels. The power amplifier circuit may be operated in several modes, including activating one amplifier during an entire cycle of an input signal to be amplified, or alternatively activating one amplifier based on a control signal that is independent of the amplified output signal. In either case, remaining amplifiers are deactivated. Coupling between the amplifiers prevents deactivated amplifiers from impeding the flow of power from the activated amplifier to the load. In another aspect of the invention, optimum efficiency at different power output levels is achieved by means of coupling each amplifier to a common power source and to the load via an impedance matching circuit, the impedance transformation being different for different amplifiers. The impedance matching circuit may comprise a push-pull transformer having taps to provide different turns ratios between respective amplifiers and the load. Alternatively, the matching circuit may comprise a number of quarter-wavelength lines each coupled at one end to the load and at the other end to one of the amplifiers via a balun.