公开(公告)号：WO2004054311A3

公开(公告)日：2004-08-26

申请号：PCT/US0339497

申请日：2003-12-10

Applicant: QUALCOMM INC

Inventor： CHEN QINGXIN ,  PATEL SHIMMAN

IPC: H04W24/02 ,  H04L1/00 ,  H04L1/20 ,  H04Q7/38

CPC classification number: H04L1/0061 ,  H04L1/0072 ,  H04L1/20 ,  H04L1/201

Abstract: Techniques to detect for DTX frames in a "primary" transmission that may be sent in a non-continuous manner using a "secondary" transmission that is sent during periods of no transmission for the primary transmission. The primary and secondary transmissions may be the ones sent on the F-DCCH and Forward Power Control Subchannel, respectively, in an IS-2000 system. In one method, a determination is first made whether or not a frame received for the primary transmission in a particular frame interval is a good frame (e.g., based on CRC). If the received frame is not a good frame, then a determination is next made whether the received frame is a DTX frame or an erased frame based on a number of metrics determined for the primary and secondary transmissions. The metrics may include symbol error rate of the received frame, secondary transmission (e.g., PC bit) energy, and received frame energy.

Abstract translation: 在“主”传输中检测可以以非连续方式发送的DTX帧的技术，使用在主传输的无传输期间发送的“次”传输。 主要和次要传输可以分别是在IS-2000系统中在F-DCCH和前向功率控制子信道上发送的。 在一种方法中，首先确定在特定帧间隔中为主传输接收的帧是否是良好帧（例如，基于CRC）。 如果接收到的帧不是良好的帧，则接着确定接收到的帧是否是基于针对主传输和次传输确定的度量的数目的DTX帧或已擦除的帧。 度量可以包括接收到的帧的符号错误率，二次传输（例如，PC位）能量和接收到的帧能量。

公开(公告)号：WO03065610A2

公开(公告)日：2003-08-07

申请号：PCT/US0302912

申请日：2003-01-31

Applicant: QUALCOMM INC

Inventor： KANG INYUP ,  PATRICK CHRISTOPHER ,  MEAGHER BRUCE R ,  PATEL SHIMMAN ,  LI TAO ,  CHEUNG JOSEPH ,  SRINAVAS PILLAPPAKKAM ,  FOERSTER GREGORY B ,  VARADARAJAN SRINIVAS ,  WEI JIAN

IPC: H04B1/707

CPC classification number: H04B1/707 ,  H04B1/7075 ,  H04B2201/70709

Abstract: A pilot searcher for CDMA and GPS signals. In one aspect, the searcher is operated in conjunction with a sample buffer in a "real-time" or "off-line" mode. The writing/reading of samples to/from the buffer may be performed in a TDM manner via a common port, and samples may be decimated and packed prior to storing in the buffer. In another aspect, the overall search for pilots is partitioned into a number of tasks, with each task corresponding to a search over a given sample segment and based on a particular set of parameter values. The tasks may be stored in a queue and performed one at a time based on their order in the queue. Prior to performing a new task, the parameter values for that task is downloaded to a set of configuration registers. The parameters may be ordered and linked such that only new values are downloaded.

Abstract translation: 用于CDMA和GPS信号的导频搜索器。 在一个方面，搜索器与“实时”或“离线”模式中的采样缓冲器结合操作。 可以通过公共端口以TDM方式执行对/从缓冲器的读取/从缓冲器的读取/读取，并且可以在存储在缓冲器中之前对样本进行抽取和打包。 在另一方面，对导频的总体搜索被划分成多个任务，其中每个任务对应于在给定采样段上的搜索并且基于特定参数值集合。 任务可以存储在队列中，并根据队列中的顺序一次执行一次。 在执行新任务之前，将该任务的参数值下载到一组配置寄存器。 可以对参数进行排序和链接，以便仅下载新值。

公开(公告)号：WO02061453A3

公开(公告)日：2003-02-13

申请号：PCT/US0204991

申请日：2002-01-31

Applicant: QUALCOMM INC

Inventor： WILBORN THOMAS BRIAN ,  PATEL SHIMMAN ,  SIH GILBERT C ,  ABRISHAMKAR FARROKH

IPC: G01S11/02 ,  G01S19/25 ,  G01S19/26

CPC classification number: G01S11/02

Abstract: A velocityx estimate is determined from a recevied signal by counting the number of times a signal in one multipath crosses a predetermined threshold in a given amount of time. A signal is received and a single multipath is extracted from the received signal. Instantaneous envelope values of the extracted multipath are calculated. A plurality of the instantaneous envelope valures are used to calculate a running RMS value. A level crossing threshold is determined using the running RMS value. The number of times the instantaneous envelope value crosses the level crossing threshold is counted. The number of level crossings is mapped to a velocity estimate.

Abstract translation: 通过计算一个多径中的信号在给定的时间量内跨越预定阈值的次数，从接收信号确定速度估计。 接收信号并从接收信号中提取单个多路径。 计算提取的多路径的瞬时包络值。 多个瞬时包络线被用于计算正在运行的RMS值。 使用正在运行的RMS值来确定级别交叉阈值。 计算瞬时包络值跨越等级交叉阈值的次数。 级别交叉点的数量映射到速度估计。

公开(公告)号：WO02061963A3

公开(公告)日：2002-09-19

申请号：PCT/US0200682

申请日：2002-01-11

Applicant: QUALCOMM INC

Inventor： RICK ROLAND ,  SUBRAHMANYA PARVATHANATHAN ,  BUTLER BRIAN ,  PATEL SHIMMAN ,  EKVETCHAVAT THUNACHATE

IPC: H04B7/06 ,  H04B7/08 ,  H04B1/707

CPC classification number: H04B1/7085 ,  H04B1/7115 ,  H04B7/0667 ,  H04B7/0697 ,  H04B2201/70701

Abstract: In an antenna diverstiy environment, the timing offset of the receiver's fingers are based on the timing offset of the received peaks of the base station transmit signals. In a system with non-neglible multipath spacing, the timing offset of the received peaks of the base station transmit signals are not necessarily at the same location. In one embodiment, the demodulating elements for the signal from each base station antenna use the same offset for demodulating and determining an error signal based on pilot signal sampling prior to the timing offset and subsequent to the timing offset. The error signals are averaged and used by a time trackin loop to track the incoming signal. In another embodiment, the demodulating elements for the signal from each base station antenna independently time track the signals with different times offsets for each finger. The preferred embodiment depends on the method used by the base station to multiplex the data onto multiple transmit antennas.

Abstract translation: 在天线多样化环境中，接收机手指的定时偏移基于接收到的基站发射信号峰值的定时偏移。 在具有不可忽略的多路径间隔的系统中，基站发射信号的接收峰值的定时偏移不一定在相同位置。 在一个实施例中，来自每个基站天线的信号的解调单元使用相同的偏移来基于定时偏移之前和定时偏移之后的导频信号采样来解调和确定误差信号。 误差信号被平均并由时间跟踪环路用于跟踪输入信号。 在另一个实施例中，来自每个基站天线的信号的解调单元独立地时间跟踪每个手指具有不同时间偏移的信号。 该优选实施例取决于基站用于将数据复用到多个发射天线上的方法。