公开(公告)号：US20150139366A1

公开(公告)日：2015-05-21

申请号：US14082867

申请日：2013-11-18

Applicant: QUALCOMM Incorporated

Inventor： Venkata Gautham CHAVALI ,  Farrokh ABRISHAMKAR ,  Insung KANG ,  Roy Franklin QUICK, JR. ,  Dario FERTONANI ,  Ming KANG ,  Hari SANKAR

IPC: H04L25/02

CPC classification number: H04L25/025 ,  H04B1/71072 ,  H04B1/7113 ,  H04L25/0204 ,  H04L25/026

Abstract: Apparatus and methods for channel estimation includes determining two streams corresponding to odd and even samples of a received signal that is sampled at a first chip rate, performing least squares successive interference cancellation on each of the two streams to obtain odd and even raw channel estimates, interlacing the odd and even raw channel estimates to obtain interlaced channel estimates, interpolating additional samples in the interlaced channel estimates to create higher chip rate channel estimates, identifying a first set of tap positions based on the higher chip rate channel estimates, and applying matching pursuit to the first set of tap positions to identify a second set of tap positions, wherein the second set of tap positions includes fewer tap positions than the first set of tap positions.

Abstract translation: 用于信道估计的装置和方法包括确定对应于以第一码片速率采样的接收信号的奇数和偶数样本的两个流，在两个流中的每一个上执行最小二乘法连续干扰消除以获得奇数和偶数的原始信道估计， 将奇数和偶数原始信道估计交错以获得隔行信道估计，在隔行信道估计中内插附加采样以产生更高的码片速率信道估计，基于较高码片速率信道估计来识别第一组抽头位置，以及应用匹配追踪 到第一组抽头位置以识别第二组抽头位置，其中第二组抽头位置包括比第一组抽头位置更少的抽头位置。

公开(公告)号：US20140086199A1

公开(公告)日：2014-03-27

申请号：US14029409

申请日：2013-09-17

Applicant: QUALCOMM Incorporated

Inventor： Dario FERTONANI ,  Insung KANG ,  Aamod Dinkar KHANDEKAR ,  Qiang SHEN

IPC: H04W72/04

CPC classification number: H04W72/0453 ,  H04L25/0204 ,  H04W56/0035

Abstract: To correct for frequency shift errors, one or more frequency tracking loops may be implemented on a broadcast channel and/or dedicated channel to correct for frequency errors. A coarse loop, fine loop, or combination thereof may be used to allow accurate correction for even large frequency errors.

Abstract translation: 为了校正频移误差，可以在广播信道和/或专用信道上实现一个或多个频率跟踪环路，以校正频率误差。 粗环，微环或其组合可用于允许对甚至大频率误差的精确校正。