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1.发明公开TECHNIQUE FOR IMPROVING OPEN LOOP POWER CONTROL IN SPEAD SPECTRUM TELECOMMUNICATIONS SYSTEMS 审中-公开方法改进与开放回路SPREIZSPEKTRUMNACHRICHTENÜBERTRAGUNGSSYSTEMEN功率控制
公开(公告)号：EP1396097A1
公开(公告)日：2004-03-10
申请号：EP02750982.7
申请日：2002-05-27
IPC分类号： H04B7/005
CPC分类号： H04W52/362 , H04W52/10 , H04W52/16 , H04W52/228 , H04W52/367 , H04W52/50
摘要： A technique for improving open loop power control in spread spectrum telecommunications systems is disclosed. In a preferred embodiment, the technique is realized by transmitting at least one first access channel probe for a first message from a mobile station to a base station, wherein the transmission power level of each access channel probe in the at least one first access channel probe is increased until a base station acknowledgment is received for a specific access channel probe of the at least one first access channel probe at a first transmission power level. The first transmission power level is then stored at the mobile station. At least one second access channel probe for a second message is then transmitted from the mobile station to the base station, wherein the transmission power level of an initial access channel probe of the at least one second access channel probe for the second message is based upon the first transmission power level.
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公开(公告)号：EP1323242A2
公开(公告)日：2003-07-02
申请号：EP01986378.6
申请日：2001-09-25
发明人： CARLSSON, Torsten , GUSTAFSSON, Kjell , ATARIUS, Roozbeh , ERIKSSON, Haakan , ÖSTBERG, Christer , PALENIUS, Torgny
IPC分类号： H04B1/707
CPC分类号： H04B1/70758 , H04B1/70757 , H04B1/712
摘要： A method and system enable matched filters of a CDMA system to be simplified using a two stage search. A course stage and a fine stage jointly produce the locations(s) of received signal path-rays. In a first stage, an oversampled digital signal (240) is decimated, and the decimated signal (415) is applied to a matched filter (420) to eventually produce an approximate location (460). In a second stage, the oversampled signal (240) is shifted based on the determined approximate location (460) and then correlated to a generated code (440), and a more-exact location is selected from the outputs of the correlations (450). Alternatively, a shifted version of the generated code (440) is correlated to the oversampled signal (240), and the more-exact location is selected from the outputs of those correlations (450).
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公开(公告)号：EP1125372B1
公开(公告)日：2003-03-26
申请号：EP99971979.2
申请日：1999-11-03
发明人： ATARIUS, Roozbeh , ERIKSSON, Hakan , PALENIUS, Torgny , CARLSSON, Torsten , ÖSTBERG, Christer , GUSTAFSSON, Kjell
CPC分类号： H04B1/7115 , H04B2201/70707
摘要： The present invention provides a system and method for reducing the power consumed by a RAKE receiver. In exemplary embodiments of the present invention, an environment variation estimator is implemented in a CDMA mobile station. The environment variation estimator is connected to the searcher of the RAKE receiver and provides an estimate of the rate at which the mobile station's environment is changing. By providing an estimate of the rate of change of the mobile station's environment, the duty cycle of the searcher can be optimized, thereby reducing the overall power consumed by the receiver. By also providing the estimate to the RAKE fingers, channel tracking can be improved.
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公开(公告)号：EP0908004B1
公开(公告)日：2002-12-11
申请号：EP97930924.2
申请日：1997-06-10
CPC分类号： H03F1/3247 , H03F1/3282 , H03F3/24 , H03F2200/102 , H03F2201/3231
摘要： The present invention relates to a method of compensating for the phase distortion that occurs in a power amplified output signal in response to the output power of a power amplifier. The invention also relates to a phase distortion compensating device. The device includes a phase-locking and upconversion loop (30-39) which is connected to the input of a power amplifier (40). Briefly, the solution involves feeding a part of the signal (epha) to be amplified back to a circuit (35) which combines this first mentioned signal with a part of the amplified signal (eout) fed back from the output of the power amplifier (40), so as to achieve a smooth transition in the dominance of one signal over the other signal when the two signals are combined to obtain a new feedback signal (efdb) from the combining circuit (35).
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5.发明公开
公开(公告)号：EP1224805A1
公开(公告)日：2002-07-24
申请号：EP00971386.8
申请日：2000-10-16
发明人： CARLSSON, Torsten , GUSTAFSSON, Kjell , HOLLSTRÖM, Magnus , LINGE, Anders , TILLGREN, Magnus , BENGTSSON, Henrik , MEDVED, Ivan , WERGELAND, Sofie , LENNARTSSON, Ola
CPC分类号： H04N7/148 , H04N19/61 , H04N2007/145
摘要： A method and apparatus is described for providing a camera accessory to a wireless mobile terminal in a wireless radiocommunication system. The wireless mobile terminal has an image data interface and a physical interface for detachably coupling the camera accessory thereto. One or more frames of image data are captured in the camera accessory and may be compressed using JPEG or MPEG format. The captured and compressed frames are transferred to the wireless mobile terminal over the image data interface using respective predetermined formats including RGB CIF, YUV CIF, JPEG, MPEG, and MPEG-4 with CIF to QCIF conversion format. The camera accessory does not include a display. Image data is captured in a predetermined format including a CIF format. Still image frames are compressed using a JPEG format and an image stream is compressed using an MPEG format. The captured and compressed frames are transferred to the wireless mobile terminal over the image data interface. The image data interface includes a wired interface and wherein the camera accessory derives a power supply from the wireless mobile terminal or includes a wireless interface.
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公开(公告)号：EP1125372A1
公开(公告)日：2001-08-22
申请号：EP99971979.2
申请日：1999-11-03
发明人： ATARIUS, Roozbeh , ERIKSSON, H kan , PALENIUS, Torgny , CARLSSON, Torsten , ÖSTBERG, Christer , GUSTAFSSON, Kjell
CPC分类号： H04B1/7115 , H04B2201/70707
摘要： The present invention provides a system and method for reducing the power consumed by a RAKE receiver. In exemplary embodiments of the present invention, an environment variation estimator is implemented in a CDMA mobile station. The environment variation estimator is connected to the searcher of the RAKE receiver and provides an estimate of the rate at which the mobile station's environment is changing. By providing an estimate of the rate of change of the mobile station's environment, the duty cycle of the searcher can be optimized, thereby reducing the overall power consumed by the receiver. By also providing the estimate to the RAKE fingers, channel tracking can be improved.
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公开(公告)号：EP0908004A1
公开(公告)日：1999-04-14
申请号：EP97930924.0
申请日：1997-06-10
CPC分类号： H03F1/3247 , H03F1/3282 , H03F3/24 , H03F2200/102 , H03F2201/3231
摘要： The present invention relates to a method of compensating for the phase distortion that occurs in a power amplified output signal in response to the output power of a power amplifier. The invention also relates to a phase distortion compensating device. The device includes a phase-locking and upconversion loop (30-39) which is connected to the input of a power amplifier (40). Briefly, the solution involves feeding a part of the signal (epha) to be amplified back to a circuit (35) which combines this first mentioned signal with a part of the amplified signal (eout) fed back from the output of the power amplifier (40), so as to achieve a smooth transition in the dominance of one signal over the other signal when the two signals are combined to obtain a new feedback signal (efdb) from the combining circuit (35).
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公开(公告)号：EP1138126A1
公开(公告)日：2001-10-04
申请号：EP99963768.9
申请日：1999-11-26
发明人： ATARIUS, Roozbeh , ERIKSSON, H kan , PALENIUS, Torgny , CARLSSON, Torsten , GUSTAFSSON, Kjell , ÖSTBERG, Christer
IPC分类号： H04B1/707
CPC分类号： H04B1/7115 , H04B1/7093
摘要： A searcher uses an input signal, and for example, a matched filter to generate a first set of candidate paths. A selector uses the input signal and the first set of candidate paths to generate a second set of paths. The second set of paths is used to configure the fingers of a RAKE receiver. According to one aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses M correlators to generate a set of M correlation values. The second stage uses the M correlation values to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses a multiple of M correlators to track the M paths and generate a set of M estimates. The second stage uses the M estimates to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the selector can generate new sets of N paths while the searcher is either active or inactive. The receiver can use a quality signal or a counter to notify the searcher and/or the selector to generate new sets of paths. The selector decreases the need to continuously run the matched filter. The receiver car re-configure the fingers without having to search for new paths. The receiver can also find paths that are uncorrelated and less susceptible to fading.
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公开(公告)号：EP0963626A2
公开(公告)日：1999-12-15
申请号：EP98901614.0
申请日：1998-01-13
发明人： MANNERSTR LE, Jacob , ISBERG, Martin , LINDQUIST, Björn , CARLSSON, Torsten , HAGBERG, Hans , JAKOBSSON, Peter , KÜNKEL, Lars, Peter , GUSTAFSSON, Kjell
CPC分类号： H04B1/0057 , H03D3/007 , H04B1/005 , H04B1/406
摘要： The present invention relates to a receiver device comprising a receiver (104) adapted to receive radio signals in two frequency bands (FB1, FB2). The radio signals in one of the frequency bands (FB1) constitute communication signals for a radio system (AMPS, NMT) having a certain channel spacing, whereas the radio signals of the second frequency band (FB2) constitutes communication signals for a second radio system (PCS1900, DCS1800, GSM) having a second certain channel spacing. The receiver (104) comprises two inputs (108, 11) each intended for a radio system having different frequency bands and channel spacing. For radio signals occuring on one input (108), mixing is performed from the RF range directly to the baseband frequency range. For radio signals occuring on the second input (108) the mixing from the radio frequency range to the baseband frequency range is carried out through an intermediate frequency range. Further the receiver (104) comprises an output (112) intended to deliver baseband signals for both radio systems. The output (112) is connected to a baseband unit which is common to the radio systems. In the baseband unit, among other things, lowpass filtering, detection and neighbouring channel suppression are performed on the received radio signal that has been mixed down to the baseband frequency range.
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10.发明授权
公开(公告)号：EP1224805B1
公开(公告)日：2004-04-14
申请号：EP00971386.8
申请日：2000-10-16
发明人： CARLSSON, Torsten , GUSTAFSSON, Kjell , HOLLSTRÖM, Magnus , LINGE, Anders , TILLGREN, Magnus , BENGTSSON, Henrik , MEDVED, Ivan , WERGELAND, Sofie , LENNARTSSON, Ola
CPC分类号： H04N7/148 , H04N19/61 , H04N2007/145
摘要： A method and apparatus is described for providing a camera accessory to a wireless mobile terminal in a wireless radiocommunication system. The wireless mobile terminal has an image data interface and a physical interface for detachably coupling the camera accessory thereto. One or more frames of image data are captured in the camera accessory and may be compressed using JPEG or MPEG format. The captured and compressed frames are transferred to the wireless mobile terminal over the image data interface using respective predetermined formats including RGB CIF, YUV CIF, JPEG, MPEG, and MPEG-4 with CIF to QCIF conversion format. The camera accessory does not include a display. Image data is captured in a predetermined format including a CIF format. Still image frames are compressed using a JPEG format and an image stream is compressed using an MPEG format. The captured and compressed frames are transferred to the wireless mobile terminal over the image data interface. The image data interface includes a wired interface and wherein the camera accessory derives a power supply from the wireless mobile terminal or includes a wireless interface.
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