公开(公告)号：US06466767B1

公开(公告)日：2002-10-15

申请号：US09149627

申请日：1998-09-08

申请人： Stefan Lidbrink ,  Kenneth Schönfeldt ,  Björn Lindquist ,  Kar-Fat Poon ,  Kenneth Ekman ,  Niclas Ögren

发明人： Stefan Lidbrink ,  Kenneth Schönfeldt ,  Björn Lindquist ,  Kar-Fat Poon ,  Kenneth Ekman ,  Niclas Ögren

IPC分类号： H04B1700

CPC分类号： H04W16/20 ,  H04B17/27 ,  H04W16/18 ,  H04W24/06 ,  H04W88/02

摘要： A test transmitter for verifying the positioning of antennas in a mobile telecommunications system and a method for manufacturing such a test transmitter that is particularly suited for indoor use are presented. A mobile terminal is modified so that it can transmit in the downlink frequency band, and preferably so that it can transmit one or more of the signal types used for downlink signalling in the mobile telecommunications system.

摘要翻译： 本发明提供了一种用于验证移动电信系统中的天线的定位的测试发射机以及特别适于室内使用的这种测试发射机的制造方法。 移动终端被修改为使得其可以在下行链路频带中发射，并且优选地使得其可以在移动电信系统中发送用于下行链路信令的信号类型中的一个或多个。

公开(公告)号：US06373909B1

公开(公告)日：2002-04-16

申请号：US09426782

申请日：1999-10-22

申请人： Björn Lindquist ,  Jan Celander ,  Sven Mattisson

发明人： Björn Lindquist ,  Jan Celander ,  Sven Mattisson

IPC分类号： H03D104

摘要： A communications terminal having a receiver and a method therefor is provided that substantially removes a known interferer from a digitally translated intermediate frequency signal. More specifically, the receiver includes an antenna for receiving a signal, and at least one combination of a mixer and filter for translating in the analog domain the signal to the intermediate frequency signal while maintaining separation from baseband. The receiver also includes a digitizer for digitally translating the intermediate frequency signal containing the known interferer from the analog domain into the digital domain, and an interference cancellation system for removing the known interferer from the digitally translated intermediate frequency signal by utilizing either a DC offset compensator or a correlator compensator.

公开(公告)号：US08467804B2

公开(公告)日：2013-06-18

申请号：US11873171

申请日：2007-10-16

申请人： Björn Lindquist

发明人： Björn Lindquist

IPC分类号： H04W24/00

CPC分类号： G01S19/34

摘要： A method for determining location of a mobile terminal includes repetitively switching power-on and power-off to a GPS receiver circuit which determines location of the mobile terminal using GPS signals. The power-on to power-off duty cycle of the GPS receiver circuit is regulated in response to distance that the mobile terminal has moved from a previously determined location. The power-on to power-off duty cycle can be regulated in response to identifying GPS isolation, in response to an acceleration-determined distance from previous GPS-determine location, an acceleration-determined velocity of the mobile terminal, availability of position assistance information from a cellular system, presence/absence of signals from a WLAN/Bluetooth device, and/or detection of a new cellular base station ID.

摘要翻译： 一种用于确定移动终端的位置的方法包括重复地切换到接收GPS电路的GPS接收器电路的开机和关机，所述GPS接收器电路使用GPS信号来确定移动终端的位置。 响应于移动终端已经从先前确定的位置移动的距离来调节GPS接收机电路的上电至断电占空比。 响应于识别GPS隔离，响应于来自先前GPS确定位置的加速度确定的距离，移动终端的加速度确定的速度，位置辅助信息的可用性，可以调节上电至断电占空比 来自蜂窝系统，存在/不存在来自WLAN /蓝牙设备的信号和/或检测新的蜂窝基站ID。

公开(公告)号：US06904104B1

公开(公告)日：2005-06-07

申请号：US09393657

申请日：1999-09-10

申请人： Anders Khullar ,  Björn Lindquist

发明人： Anders Khullar ,  Björn Lindquist

IPC分类号： H04L27/22 ,  H04L7/02 ,  H04L25/06 ,  H04L27/233 ,  H04Q7/38 ,  H03D3/22

CPC分类号： H04L7/0054 ,  H04L25/068 ,  H04L27/2332

摘要： A receiver section recovers the in-phase and quadrature components of a linear modulated data signal. The in-phase signal is sampled and quantized producing an in-phase sample stream, and the quadrature phase signal is sampled and quantized producing a quadrature sample stream. The in-phase sample stream and the quadrature sample stream are both over-sampled at a rate of N times a symbol rate of the data signal. A decimation section filters the quantized in-phase sample stream and the quantized quadrature sample stream to produce a reduced in-phase sample stream and a reduced quadrature sample stream at a rate of M times the symbol rate, wherein M is less than or equal to N. A decision component calculates the magnitude of a combination of an in-phase sample and a quadrature sample at M corresponding sample points in the reduced in-phase sample stream and the reduced quadrature sample stream, respectively, and then forms an in-phase symbol stream and a quadrature symbol stream using the in-phase sample and the quadrature sample, respectively, associated with the sample point having a largest magnitude.

摘要翻译： 接收器部分恢复线性调制数据信号的同相和正交分量。 同相信号被采样和量化，产生同相采样流，并对正交相位信号进行采样和量化，产生正交样本流。 同相采样流和正交采样流都以数据信号的符号率N倍的速率过采样。 抽取部分对量化的同相采样流和量化的正交采样流进行滤波，以符号速率M倍的速率产生减小的同相采样流和减小的正交样本流，其中M小于或等于 N.一个决策分量在减少的同相采样流和减小的正交采样流中的M个对应采样点处分别计算同相采样和正交采样的组合的幅度，然后形成同相 符号流和使用与具有最大幅度的采样点相关联的同相采样和正交样本的正交符号流。

公开(公告)号：US06473471B2

公开(公告)日：2002-10-29

申请号：US08699774

申请日：1996-08-13

申请人： Björn Lindquist ,  Paul W. Dent

发明人： Björn Lindquist ,  Paul W. Dent

IPC分类号： H04L2706

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

摘要： A method for processing a signal modulated with information symbols to account for an additive offset and slope is disclosed. First, an initial estimate of offset and slope is made and hypotheses of all possible values of a sequence of one or more information symbols are then made. For each of said hypotheses, the associated data symbol sequence is used to make an improved estimate of offset and slope and the improved estimate of offset and slope are stored against each of the hypotheses. For each hypothesis, the improved estimate of offset and slope is used in calculating an expected signal value and a mismatch between a sample of the modulated signal and the expected value is computed. The hypotheses are then sequentially extended by one symbol, the slope and offset estimates are updated and the mismatches are accumulated to form a path metric value for each extended hypothesis, and resolving between said hypotheses based on said path metric values using a Viterbi Sequential Maximum Likelihood Sequence Estimation process to produce a most likely hypothesis of said modulated information symbols substantially unimpaired by said additive slope and offset.

摘要翻译： 公开了一种处理用信息符号调制以解决附加偏移和斜率的信号的方法。 首先，进行偏移和斜率的初始估计，然后进行一个或多个信息符号的序列的所有可能值的假设。 对于每个所述假设，相关联的数据符号序列用于对偏移和斜率进行改进的估计，并且针对每个假设存储改进的偏移和斜率估计。 对于每个假设，在计算预期信号值时使用改进的偏移和斜率估计，并且计算调制信号的样本与期望值之间的失配。 然后将假设顺序地扩展一个符号，更新斜率和偏移估计，并且不匹配被累积以形成每个扩展假设的路径度量值，并且基于使用维特比序列最大似然的所述路径度量值在所述假设之间进行解析 序列估计过程，以产生基本上不受所述相加斜率和偏移量影响的所述调制信息符号的最可能假设。

公开(公告)号：US06198355B1

公开(公告)日：2001-03-06

申请号：US09266844

申请日：1999-03-12

申请人： Björn Lindquist ,  Magnus Nilsson

发明人： Björn Lindquist ,  Magnus Nilsson

IPC分类号： H03L7085

CPC分类号： H03L7/0891 ,  H03D13/004 ,  H03L7/0896 ,  H03L7/0898 ,  H03L7/1976

摘要： There is disclosed a phase detector which triggers on both rising and falling edges of an input pulse signal. This effectively doubles the frequency of the input signal. When the phase detector is used in a phase locked loop, the doubled frequency means that a lower division ratio can be used, thereby reducing any noise contribution introduced thereby.

摘要翻译： 公开了一种在输入脉冲信号的上升沿和下降沿触发的相位检测器。 这有效地使输入信号的频率加倍。 当相位检测器用于锁相环时，双倍频率意味着可以使用较低的分频比，从而减少由此引入的任何噪声贡献。