-
公开(公告)号：US07382821B2
公开(公告)日：2008-06-03
申请号：US11626728
申请日：2007-01-24
申请人： Roozbeh Atarius , Torsten J. Carlsson , Håkan B. Eriksson , Kjell B. Gustafsson , Torgny Palenius , Christer Östberg
发明人： Roozbeh Atarius , Torsten J. Carlsson , Håkan B. Eriksson , Kjell B. Gustafsson , Torgny Palenius , Christer Östberg
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：US07184462B1
公开(公告)日：2007-02-27
申请号：US09204370
申请日：1998-12-04
申请人： Roozbeh Atarius , Torsten J. Carlsson , H{dot over (a)}kan B. Eriksson , Kjell B. Gustafsson , Torgny Palenius , Christer Östberg
发明人： Roozbeh Atarius , Torsten J. Carlsson , H{dot over (a)}kan B. Eriksson , Kjell B. Gustafsson , Torgny Palenius , Christer Östberg
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。
-
3.发明授权Method and apparatus for changing the channel bandwidth that is receivable in a radio receiver 有权用于改变在无线电接收机中可接收的信道带宽的方法和装置公开(公告)号：US06385262B1
公开(公告)日：2002-05-07
申请号：US09221398
申请日：1998-12-28
IPC分类号： H04Q714
CPC分类号： H04W88/06 , H04B1/005 , H04B1/0057 , H04B1/006 , H04B1/406
摘要： The present invention relates to an arrangement (1) and a method in a receiver in a multi-mode mobile radio (m), wherein the intention is to design the receiver so that it uses the same hardware to process several different channel bandwidths corresponding to the different networks used by the radio (m). This is done by changing a sampling frequency (fs) which controls a digital filter unit (25) situated in the digital part of the receiver. The changing of the sampling frequency (fs) results in that the bandwidth of the digital filter unit (25) is scaled accordingly, wherein the desired channel bandwidth at baseband of the radio network (GSM1900, AMPS) to be used by the radio (m) is selected in the digital filter unit (25). As a complement, the digital filter unit (25) can be implemented with a programmable function, where a change of parameters and/or filter structure inside the digital filter unit (25) can be used to adjust the filter bandwidth.
摘要翻译： 本发明涉及多模式移动无线电（m）中的接收机中的一种装置（1）和方法，其中意图是设计接收机，使得它使用相同的硬件来处理对应于 广播使用的不同网络（m）。 这通过改变控制位于接收机的数字部分中的数字滤波器单元（25）的采样频率（fs）来完成。 采样频率（fs）的变化导致数字滤波器单元（25）的带宽相应地缩放，其中无线电网络（GSM1900，AMPS）的基带处的无线电需要信道带宽（m ）在数字滤波器单元（25）中被选择。 作为补充，数字滤波器单元（25）可以用可编程功能实现，其中可以使用数字滤波器单元（25）内部的参数和/或滤波器结构的改变来调整滤波器带宽。
-
4.发明授权
公开(公告)号：US6047029A
公开(公告)日：2000-04-04
申请号：US931430
申请日：1997-09-16
CPC分类号： H03C3/0933 , H03C3/0925 , H03L7/1974 , H03L7/1976 , H04L27/2017
摘要： A frequency synthesizer has a phase locked loop, a .DELTA..SIGMA. modulator, and a filter. The phase locked loop includes a frequency divider that controls the frequency of the phase locked loop output signal. The output of the .DELTA..SIGMA. modulator is fed through the filter and the output of the filter is used to control a division factor in the frequency divider. Compensation may be performed at the input to the .DELTA..SIGMA. modulator in order to compensate for the filtering performed between the .DELTA..SIGMA. modulator and the frequency divider. The filter may be used to reduce quantization noise in an input to the frequency divider, and thereby reduces phase noise in an output of the phase locked loop.
摘要翻译： 频率合成器具有锁相环，DELTA SIGMA调制器和滤波器。 锁相环包括控制锁相环输出信号频率的分频器。 DELTA SIGMA调制器的输出通过滤波器馈送，滤波器的输出用于控制分频器中的分频因子。 可以在DELTA SIGMA调制器的输入端执行补偿，以补偿在DELTA SIGMA调制器和分频器之间执行的滤波。 滤波器可以用于减小分频器的输入中的量化噪声，从而减少锁相环输出中的相位噪声。
-
公开(公告)号：US6011815A
公开(公告)日：2000-01-04
申请号：US931302
申请日：1997-09-16
CPC分类号： H03C3/0933 , H03C3/0925 , H03L7/1976
摘要： A .DELTA..SIGMA. controlled phase locked loop modulation is used with limited oversampling factors while fulfilling the spectrum and/or phase noise requirements on the modulation in the phase locked loop. By filtering the quantization noise sufficiently then compensating for the distortion of the modulation at the input of the .DELTA..SIGMA. modulator, the required oversampling factor of the .DELTA..SIGMA. controlled phase locked loop modulators can be reduced without loss of performance. The distortion is mitigated by performing a compensation at the input to the .DELTA..SIGMA. modulator. The noise reduction obtained by lowering the bandwidth of the phase locked loop can then be traded to reduce the oversampling factor.
摘要翻译： 使用DELTA SIGMA控制的锁相环调制与有限的过采样因子一起使用，同时满足在锁相环中的调制的频谱和/或相位噪声要求。 通过充分过滤量化噪声，然后补偿DELTA SIGMA调制器输入端的调制失真，可以减少DELTA SIGMA控制的锁相环调制器所需的过采样因子，而不会损失性能。 通过在DELTA SIGMA调制器的输入端执行补偿来减轻失真。 然后可以交换通过降低锁相环的带宽获得的噪声降低以减少过采样因子。
-
-
-
-
搜索结果
5 条记录 (耗时 0.022 秒)
