公开(公告)号：US6029052A

公开(公告)日：2000-02-22

申请号：US886244

申请日：1997-07-01

申请人： Martin Isberg ,  Bjorn Lindquist ,  Peter Jakobsson ,  Jan Celander ,  Kjell Gustafsson ,  Lars-Peter Kunkel ,  Torsten Carlsson ,  Jacob Mannerstr.ang.le

发明人： Martin Isberg ,  Bjorn Lindquist ,  Peter Jakobsson ,  Jan Celander ,  Kjell Gustafsson ,  Lars-Peter Kunkel ,  Torsten Carlsson ,  Jacob Mannerstr.ang.le

IPC分类号： H04L27/22 ,  H03J5/24 ,  H04B1/16 ,  H04B1/30 ,  H04B1/40 ,  H04J1/04 ,  H04W88/06 ,  H04Q7/32

CPC分类号： H04W88/06 ,  H03J5/244 ,  H04B1/005 ,  H04B1/0057 ,  H04B1/006 ,  H04B1/406

摘要： A multiple-mode receiver incorporating direct conversion (processing received signals using intermediate frequencies within the same frequency range as the received signal bandwidth) rather than superheterodyne circuitry, allowing receiver hardware components to be re-used rather than replicated for each band. Various embodiments are disclosed in which low pass filters, mixers, quadrature generators, oscillators, and amplifiers are re-used.

摘要翻译： 包括直接转换的多模式接收机（处理使用与接收信号带宽相同的频率范围内的中频）的接收信号，而不是超外差电路，允许重复使用接收机硬件组件而不是复制每个频带。 公开了各种实施例，其中重新使用低通滤波器，混频器，正交发生器，振荡器和放大器。

公开(公告)号：US6091963A

公开(公告)日：2000-07-18

申请号：US6867

申请日：1998-01-14

申请人： Jacob Mannerstr.ang.le ,  Martin Isberg ,  Bjorn Lindquist ,  Torsten Carlsson ,  Hans Hagberg ,  Peter Jakobsson ,  Lars Kunkel ,  Kjell Gustafsson

发明人： Jacob Mannerstr.ang.le ,  Martin Isberg ,  Bjorn Lindquist ,  Torsten Carlsson ,  Hans Hagberg ,  Peter Jakobsson ,  Lars Kunkel ,  Kjell Gustafsson

IPC分类号： H04B1/26 ,  H03D3/00 ,  H04B1/40 ,  H04B1/18

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 occurring on one input (108), mixing is performed from the RF range directly to the baseband frequency range. For radio signals occurring 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.

摘要翻译： 本发明涉及一种接收机设备，包括适于接收两个频带（FB1，FB2）中的无线电信号的接收机（104）。 一个频带（FB1）中的无线电信号构成具有一定信道间隔的无线电系统（AMPS，NMT）的通信信号，而第二频带（FB2）的无线电信号构成用于第二无线电系统 （PCS1900，DCS1800，GSM）具有第二特定信道间隔。 接收器（104）包括两个输入端（108,11），每个输入端用于具有不同频带和信道间隔的无线电系统。 对于在一个输入（108）上发生的无线电信号，从RF范围直接到基带频率范围进行混频。 对于在第二输入（108）上发生的无线电信号，通过中频范围执行从射频范围到基带频率范围的混合。 此外，接收器（104）包括旨在为两个无线电系统传送基带信号的输出（112）。 输出（112）连接到无线电系统共用的基带单元。 在基带单元中，对已经混合到基带频率范围的接收无线电信号执行低通滤波，检测和相邻信道抑制。

公开(公告)号：US5579347A

公开(公告)日：1996-11-26

申请号：US365037

申请日：1994-12-28

申请人： Bjorn Lindquist ,  Martin Isberg ,  Heino Wendelrup ,  Martin Sallenhag ,  Kjell Gustafsson

发明人： Bjorn Lindquist ,  Martin Isberg ,  Heino Wendelrup ,  Martin Sallenhag ,  Kjell Gustafsson

IPC分类号： H04L27/38 ,  H03D3/00 ,  H04B1/10 ,  H04B1/22 ,  H04B1/26 ,  H04B1/30 ,  H04L27/14 ,  H04L27/227 ,  H04L27/233 ,  H03D1/22 ,  H04B1/12

CPC分类号： H03D3/009 ,  H04B1/30 ,  H04L27/2275 ,  H04L27/2332

摘要： A digitally compensated direct-conversion receiver includes devices for generating digital samples of a base-band in-phase signal and a base-band quadrature signal and for detecting the presence of a second-order product signal produced by an amplitude-modulated interfering signal. Also, the apparatus comprises a device for digitally compensating the digital samples by removing the second-order product signal, thereby producing compensated digital samples. In one method of digitally compensating samples of an information signal quadrature-modulating a carrier signal, estimated samples of a second-order product from a switched carrier signal are formed by averaging the digital samples during two time periods and by determining a time of ramps in the in-phase and quadrature signals that occur between the time periods due to the interfering signal. The digital samples may be differentiated and the results smoothed in determining the time of the ramps. In another apparatus, the estimated samples of the second-order product signal are produced by a device for averaging a square of a difference between respective digital samples of the in-phase signal and the quadrature signal, thereby determining an amplitude of the amplitude-modulated carrier signal, and a device for combining the amplitude and the digital samples, thereby generating the estimated samples.

摘要翻译： 数字补偿直接转换接收机包括用于产生基带同相信号和基带正交信号的数字样本的装置，并用于检测由幅度调制的干扰信号产生的二阶乘积信号的存在。 此外，该装置包括一个用于通过去除二阶乘积信号对数字样本进行数字补偿从而产生经补偿的数字样本的装置。 在对对载波信号进行正交调制的信息信号的样本进行数字补偿的一种方法中，通过在两个时间段期间对数字样本进行平均并且通过确定在两个时间段内的斜坡时间来形成来自切换载波信号的二阶乘积的估计样本 由于干扰信号在时间周期之间发生的同相和正交信号。 可以区分数字样本，并且在确定斜坡的时间时平滑结果。 在另一装置中，二阶乘积信号的估计样本由用于对同相信号和正交信号的相应数字样本之间的差的平方进行平均的装置产生，由此确定幅度调制的幅度 载波信号和用于组合幅度和数字样本的装置，由此产生估计样本。

公开(公告)号：US06373882B1

公开(公告)日：2002-04-16

申请号：US09187002

申请日：1998-11-06

申请人： Roozbeh Atarius ,  Torsten Carlsson ,  Håkan Eriksson ,  Kjell Gustafsson ,  Torgny Palenius ,  Christer Östberg

发明人： Roozbeh Atarius ,  Torsten Carlsson ,  Håkan Eriksson ,  Kjell Gustafsson ,  Torgny Palenius ,  Christer Östberg

IPC分类号： H04B1500

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.

摘要翻译： 本发明提供了一种用于减少RAKE接收机消耗的功率的系统和方法。 在本发明的示例性实施例中，在CDMA移动台中实现环境变化估计器。 环境变化估计器连接到RAKE接收机的搜索者，并提供移动台环境正在改变的速率的估计。 通过提供移动台环境变化率的估计，可以优化搜索者的占空比，从而降低接收机消耗的总体功耗。 通过向RAKE手指提供估计，可以改善频道跟踪。

公开(公告)号：US07065130B1

公开(公告)日：2006-06-20

申请号：US09678165

申请日：2000-10-02

申请人： Roozbeh Atarius ,  Håkan Eriksson ,  Torgny Palenius ,  Christer Östberg ,  Torsten Carlsson ,  Kjell Gustafsson

发明人： Roozbeh Atarius ,  Håkan Eriksson ,  Torgny Palenius ,  Christer Östberg ,  Torsten Carlsson ,  Kjell Gustafsson

IPC分类号： H04B15/00 ,  H04K1/00 ,  H04L27/30

CPC分类号： H04B1/70758 ,  H04B1/70757 ,  H04B1/712

摘要： A method and system enables matched filters of a CDMA system to be simplified using a two stage search. A course stage and a fine stage jointly produce the location(s) of received signal path-rays. In a first stage, an oversampled digital signal is decimated, and the decimated signal is applied to a matched filter to eventually produce an approximate location. In a second stage, the oversampled signal is shifted based on the determined approximate location and then correlated to a generated code, and a more-exact location is selected from the outputs of the correlations. Alternatively, a shifted version of the generated code is correlated to the oversampled signal, and the more-exact location is selected from the outputs of those correlations.

摘要翻译： 一种方法和系统使得能够使用两级搜索来简化CDMA系统的匹配滤波器。 课程阶段和精细阶段共同产生接收到的信号路径射线的位置。 在第一阶段，抽取过采样的数字信号，并将抽取的信号施加到匹配滤波器以最终产生近似位置。 在第二阶段，过采样信号基于所确定的近似位置移位，然后与生成的代码相关，并且从相关的输出中选择更精确的位置。 或者，生成的代码的移位版本与过采样信号相关，并且从这些相关的输出中选择更精确的位置。

公开(公告)号：US06792148B1

公开(公告)日：2004-09-14

申请号：US09680287

申请日：2000-10-06

申请人： Sofie Wergeland ,  Ivan Medved ,  Henrik Bengtsson ,  Ola Lennartsson ,  Kjell Gustafsson ,  Torsten Carlsson ,  Magnus Hollström ,  Anders Linge ,  Magnus Tillgren

发明人： Sofie Wergeland ,  Ivan Medved ,  Henrik Bengtsson ,  Ola Lennartsson ,  Kjell Gustafsson ,  Torsten Carlsson ,  Magnus Hollström ,  Anders Linge ,  Magnus Tillgren

IPC分类号： G06K936

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 is captured in the camera accessory and compressed according to one or more compression formats. The captured and compressed frames are transferred to the wireless mobile terminal over the image data interface. 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 using respective predetermined formats including RGB CIF, YUV CIF, JPEG, MPEG, and MPEG-4 with CIF to QCIF conversion format. 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.

摘要翻译： 描述了一种在无线无线电通信系统中为无线移动终端提供照相机附件的方法和装置。 无线移动终端具有图像数据接口和用于将照相机附件可拆卸地连接到其上的物理接口。 一个或多个图像数据帧在相机附件中被捕获并根据一种或多种压缩格式进行压缩。 捕获和压缩的帧通过图像数据接口传送到无线移动终端。 相机配件不包括显示屏。 以包括CIF格式的预定格式捕获图像数据。 静止图像帧使用JPEG格式压缩，图像流使用MPEG格式进行压缩。 捕获和压缩的帧通过图像数据接口使用各自的预定格式传送到无线移动终端，包括具有CIF至QCIF转换格式的RGB CIF，YUV CIF，JPEG，MPEG和MPEG-4。 图像数据接口包括有线接口，并且其中相机配件从无线移动终端获得电源或者包括无线接口。

公开(公告)号：US20070116103A1

公开(公告)日：2007-05-24

申请号：US11626728

申请日：2007-01-24

申请人： Roozbeh Atarius ,  Torsten Carlsson ,  Hakan Eriksson ,  Kjell Gustafsson ,  Torgny Palenius ,  Christer Ostberg

发明人： Roozbeh Atarius ,  Torsten Carlsson ,  Hakan Eriksson ,  Kjell Gustafsson ,  Torgny Palenius ,  Christer Ostberg

IPC分类号： H04B1/00

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 can 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.

摘要翻译： 搜索者使用输入信号，例如，匹配滤波器来生成第一组候选路径。 选择器使用输入信号和第一组候选路径来生成第二组路径。 第二组路径用于配置RAKE接收机的手指。 根据本发明的一个方面，第一组候选路径包含M个路径，第二阶段使用M个相关器来生成一组M个相关值。 第二级使用M个相关值来选择用于配置RAKE接收机的N个手指的N个路径。 根据本发明的另一方面，第一组候选路径包含M个路径，并且第二阶段使用多个M个相关器来跟踪M个路径并生成一组M个估计。 第二阶段使用M个估计来选择用于配置RAKE接收机的N个手指的N个路径。 根据本发明的另一方面，当搜索者处于活动或不活动状态时，选择器可以生成新的N个路径集合。 接收机可以使用质量信号或计数器来通知搜索者和/或选择器来生成新的路径集合。 选择器减少了连续运行匹配滤波器的需要。 接收机可以重新配置手指，而无需搜索新的路径。 接收机还可以找到不相关的路径，并且不易受衰落影响。

公开(公告)号：US07024168B1

公开(公告)日：2006-04-04

申请号：US09348494

申请日：1999-07-07

申请人： Kjell Gustafsson ,  Torsten Carlsson ,  Torgny Palenius

发明人： Kjell Gustafsson ,  Torsten Carlsson ,  Torgny Palenius

IPC分类号： H04B17/20

CPC分类号： H04B7/0877 ,  H04B7/0808 ,  H04L1/0025 ,  H04L1/0036 ,  H04L1/06

摘要： A mobile station with a receiver having antenna diversity where the diversity processing is controlled from the base band processing circuit and only turned on when the performance gain justifies extra power consumption. The base band processing circuit may be instructed by the network that it can cease diversity reception after evaluating cell leads within a system.

摘要翻译： 具有接收机的移动台具有天线分集，其中从基带处理电路控制分集处理，并且仅当性能增益证明额外功率消耗时才导通。 基带处理电路可以由网络指示，其可以在对系统内的小区引线进行评估之后停止分集接收。

公开(公告)号：US06259747B1

公开(公告)日：2001-07-10

申请号：US08822244

申请日：1997-03-20

申请人： Kjell Gustafsson ,  Torsten Carlsson

发明人： Kjell Gustafsson ,  Torsten Carlsson

IPC分类号： H03C300

CPC分类号： H04L27/2071

摘要： An IQ modulator, and an associated method, for a digital transmitter. The IQ modulator forms I- and Q-components which modulate a carrier. The IQ modulator permits simple and quick introduction of frequency offsets to overcome the effects of Doppler shifting or to form channel offsets in an FDMA communication scheme.

摘要翻译： 用于数字发射机的IQ调制器和相关联的方法。 IQ调制器形成调制载体的I和Q成分。 IQ调制器允许简单快速地引入频率偏移以克服多普勒频移的影响或在FDMA通信方案中形成信道偏移。

公开(公告)号：US06370186B1

公开(公告)日：2002-04-09

申请号：US09195990

申请日：1998-11-20

申请人： Kjell Gustafsson ,  Roozbeth Atarius

发明人： Kjell Gustafsson ,  Roozbeth Atarius

IPC分类号： H03M100

CPC分类号： H03K23/667 ,  H04B1/406

摘要： A circuit is disclosed for sampling analog signals at a rate which is a rational, non-integer fraction of a clock frequency. The analog signal is sampled at non-equidistant sampling points, with the distances between successive points forming a jitter sequence. The jitter sequence is pre-calculated and stored in a memory within the circuit, reducing processing requirements in use.

摘要翻译： 公开了一种以时钟频率的合理的非整数分数的速率对模拟信号进行采样的电路。 模拟信号在非等距采样点采样，连续点之间的距离形成抖动序列。 抖动序列被预先计算并存储在电路内的存储器中，从而减少使用中的处理要求。