公开(公告)号：WO0159937A2

公开(公告)日：2001-08-16

申请号：PCT/US0102747

申请日：2001-01-26

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  SIH GILBERT ,  ROH MARK ,  BUTLER BRIAN ,  CHALLA RAGHU

IPC: H04B1/7087 ,  H04B1/7115 ,  H04B1/7117 ,  H04L27/00 ,  H04B1/00

CPC classification number: H04B1/7087 ,  H04B1/7115 ,  H04B1/7117 ,  H04B2201/70701 ,  H04L27/0014 ,  H04L2027/0032 ,  H04L2027/0057 ,  H04L2027/0087

Abstract: A novel and improved method and apparatus for frequency tracking is described. Two main sources of error that contribute to the frequency difference between locally generated carriers and those used to modulate received signals include frequency offset between the two timing sources and doppler effects due to relative movement between the sources. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger (700a..700n) of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated (710) and filtered (720) to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator (706a...706n) for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error finger.

Abstract translation: 描述了用于频率跟踪的新颖和改进的方法和装置。 导致本地产生的载波与用于调制接收信号的载波之间的频率差异的两个主要误差源包括两个定时源之间的频率偏移以及由于源之间的相对运动引起的多普勒效应。 本发明提供了一种用于消除由于频率偏移引起的误差的影响的跟踪机制以及由多个多径信号中的多普勒引起的频率误差的补偿。 利用本发明的RAKE接收机的每个手指（700a ... 700n）将计算该手指的频率误差。 计算所有这些频率误差的加权平均值（710）并进行滤波（720）以提供用于改变IF和RF频率合成器的频率的控制信号，从而考虑每个手指处看到的共同频率偏移。 此外，每个手指配备有用于提供特定于该手指的频率调节的旋转器（706a ... 706n）。 每个手指的频率通过频率误差手指的反馈进行调整。

公开(公告)号：WO2005004502A2

公开(公告)日：2005-01-13

申请号：PCT/US2004020918

申请日：2004-06-28

Applicant: QUALCOMM INC ,  ROH MARK ,  RISTIC BORISLAV

Inventor： ROH MARK ,  RISTIC BORISLAV

IPC: G01S1/00 ,  H04B1/16 ,  H04W52/02 ,  H04Q

CPC classification number: H04W52/029 ,  G01S19/34 ,  Y02D70/00 ,  Y02D70/164

Abstract: A system for optimizing power use in a wireless communication device includes a selectively activated first timer which has a first level of power consumption and which generates a first time signal with a first level of accuracy. A selectively activated second timer has a second level of power consumption, less than the first level of power consumption, generates a second time signal with a second level of accuracy less than the first level of accuracy. A selectively activated position determination receiver has a third level of power consumption, and receives signals that permit position determination using the received signals and either the first or the second time signal. A selection processor selectively activates either the first or the second timer for use with the position determination receiver to optimize power consumption of the wireless communication device.

Abstract translation: 一种用于优化无线通信设备中的功率使用的系统包括有选择地激活的第一定时器，其具有第一功率消耗水平并且以第一精度水平产生第一时间信号。 选择性激活的第二定时器具有小于功率消耗的第一级的功率消耗的第二级，产生具有小于第一精度水平的第二精度等级的第二时间信号。 选择性激活的位置确定接收机具有第三级功率消耗，并且接收允许使用接收到的信号和第一或第二时间信号进行位置确定的信号。 选择处理器选择性地激活第一或第二定时器以与位置确定接收器一起使用以优化无线通信设备的功率消耗。

公开(公告)号：WO0154432A3

公开(公告)日：2002-01-10

申请号：PCT/US0100939

申请日：2001-01-12

Applicant: QUALCOMM INC

Inventor： ABRISHAMKAR FARROKH ,  ROH MARK

IPC: H04B1/7075 ,  H04B1/7077 ,  H04B7/26 ,  H04W68/00 ,  H04B1/707

CPC classification number: H04W68/00 ,  H04B1/70751 ,  H04B1/7077 ,  H04B2201/70702 ,  H04B2201/70707 ,  Y02D70/00 ,  Y02D70/40

Abstract: A system for facilitating the detection and successful decoding of a quick paging channel adapted for use with a wireless communications system (10) supporting a primary paging channel and a quick paging channel. The system includes a first mechanism (46, 48, 50) for detecting a pilot signal associated with the quick paging channel based on a received signal and includes a coherent integrator (104, 106) of a first length (N) and a noncoherent integrator (114) of a second length (M). The second mechanism determines receiver operating characteristics of the system based on the pilot signal and a quick paging channel signal associated with the quick paging channel. The third mechanism optimizes the first length and the second length based on the receiver operating characteristics.

Abstract translation: 一种便于对支持主寻呼信道和快速寻呼信道的无线通信系统（10）使用的快速寻呼信道的检测和成功解码的系统。 该系统包括用于基于接收到的信号检测与快速寻呼信道相关联的导频信号的第一机制（46,48,50），并且包括第一长度（N）和非相干积分器的相干积分器（104,106） （114）的第二长度（M）。 第二机制基于导频信号和与快速寻呼信道相关联的快速寻呼信道确定系统的接收机操作特性。 第三机构基于接收器的操作特性来优化第一长度和第二长度。