公开(公告)号：NO20042344L

公开(公告)日：2004-07-28

申请号：NO20042344

申请日：2004-06-07

Applicant: QUALCOMM INC

Inventor： SMEE JOHN E ,  JAYARAMAN SRIKANT ,  FERNANDEZ-CORBATON IVAN JESUS

IPC: H03D7/00 ,  H03D1/00 ,  H03J7/04 ,  H04B1/26 ,  H04B1/707 ,  H04L27/00 ,  H03D7/16

Abstract: A carrier recovery method and apparatus using multiple stages of carrier frequency recovery are disclosed. A receiver uses multiple frequency generation sources to generate carrier signals used to downconvert a received signal. An analog frequency reference having a wide frequency range and coarse frequency resolution is used in conjunction with a digital frequency reference having a narrow frequency range and fine frequency resolution. The multiple carrier signals are multiplied by a received signal to effect a multi-stage downconversion, resulting in a baseband signal. A frequency tracking module measures the residual frequency error present in the baseband signal. The measured residual frequency error is then used to adjust the frequencies of the carrier signals generated by the multiple frequency generation sources.

公开(公告)号：NO20042343A

公开(公告)日：2004-07-23

申请号：NO20042343

申请日：2004-06-07

Applicant: QUALCOMM INC

Inventor： SMEE JOHN E ,  JAYARAMAN SRIKANT ,  FERNANDEZ-CORBATON IVAN JESUS

IPC: H04B1/707 ,  H04B1/00 ,  H04B1/10

CPC classification number: H04B1/1036

公开(公告)号：CA2465729A1

公开(公告)日：2003-05-15

申请号：CA2465729

申请日：2002-10-29

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  JAYARAMAN SRIKANT ,  SMEE JOHN E

IPC: H04B1/707 ,  H04B1/00 ,  H04B1/10

Abstract: Techniques for detecting and mitigating adjacent channel interference (ACI) in a wireless (e.g., CDMA) communication system. In one aspect, ACI may be determined by signaling or detected by filtering a pre-processed signal in each frequency range where ACI may be present (e.g., with a respective bandpass filter), estimating the energy of the filtered signal for each frequency range, comparing the estimated energy against an ACI threshold, an d indicating the presence or absence of ACI at each frequency range based on t he result of the comparison. In another aspect, a selectable filter (e.g., a FI R filter) having a number of possible filter responses (e.g., provided by a number of sets of filter coefficients) may be used to provide filtering for the pre-processed signal and to reject any detected ACI. One of the possible filter responses is selected for use depending on whether and where ACI has been detected.

公开(公告)号：HUE035811T2

公开(公告)日：2018-05-28

申请号：HUE09165095

申请日：2008-01-10

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  BLANZ JOSEF

IPC: H04W52/34 ,  H04J13/00

公开(公告)号：CA2760491C

公开(公告)日：2017-06-13

申请号：CA2760491

申请日：2008-01-10

Applicant: QUALCOMM INC

Inventor： BLANZ JOSEF J ,  FERNANDEZ-CORBATON IVAN JESUS

IPC: H04W52/24 ,  H04W24/00 ,  H04W52/34

Abstract: Techniques for signaling power information to facilitate channel quality indicator (CQI) reporting are described. A Node B may send power information that may be used by a UE to determine a power per channelization code, POVSF. In one design, the power information includes a power offset between the power of a data channel, PHSPDSCH, and the power of a pilot channel. The Node B may determine PHSPDSCH based on the power available for the data channel, the number of available channelization codes, and a designated number of channelization codes. The UE may determine POVSF based on the power information from the Node B and the designated number of channelization codes. The UE may estimate at least one SINR of at least one transport block based on POVSF, determine CQI information for the transport block(s) based on the SINR, and send the CQI information to the Node B.

公开(公告)号：AT549792T

公开(公告)日：2012-03-15

申请号：AT02803187

申请日：2002-11-08

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  SMEE JOHN ,  JAYARAMAN SRIKANT

IPC: H03D7/00 ,  H03D7/16 ,  H03D1/00 ,  H03J7/04 ,  H04B1/26 ,  H04B1/707 ,  H04L27/00

Abstract: A carrier recovery method and apparatus using multiple stages of carrier frequency recovery are disclosed. A receiver uses multiple frequency generation sources to generate carrier signals used to downconvert a received signal. An analog frequency reference having a wide frequency range and coarse frequency resolution is used in conjunction with a digital frequency reference having a narrow frequency range and fine frequency resolution. The multiple carrier signals are multiplied by a received signal to effect a multi-stage downconversion, resulting in a baseband signal. A frequency tracking module measures the residual frequency error present in the baseband signal. The measured residual frequency error is then used to adjust the frequencies of the carrier signals generated by the multiple frequency generation sources.

公开(公告)号：AT527792T

公开(公告)日：2011-10-15

申请号：AT10175826

申请日：2003-07-18

Applicant: QUALCOMM INC

Inventor： JAYARAMAN SRIKANT ,  FERNANDEZ-CORBATON IVAN JESUS ,  SMEE JOHN E

IPC: H04L25/03 ,  H04L27/01 ,  H04B7/005 ,  H04L25/00

Abstract: A method and apparatus for a decision feedback equalizer wherein a correction term is used to compensate for slicer errors, thus avoiding error propagation. Filter coefficients for the equalizer are selected so as to minimize a cost function for the equalizer, including a correction term as a function of the energy of the filter coefficients. The equalizer includes a coefficient generator responsive to the correction term. One embodiment estimates a transmitted symbol from a received sample as a function of Signal-to-Interference and Noise Ratio (SINR) of the received sample. The received sample is quantized and mapped to a region of a grid overlaid on the transmitted symbol constellation. The region may correspond to a symbol estimate value or may be processed further to obtain a symbol estimate value.

公开(公告)号：BRPI0806480A2

公开(公告)日：2011-09-27

申请号：BRPI0806480

申请日：2008-01-10

Applicant: QUALCOMM INC

Inventor： BLANZ JOSEF J ,  FERNANDEZ-CORBATON IVAN JESUS

IPC: H04B7/005 ,  H04W52/34

Abstract: Techniques for signaling power information to facilitate channel quality indicator (CQI) reporting are described. A Node B may send power information that may be used by a UE to determine a power per channelization code, P OVSF . In one design, the power information includes a power offset between the power of a data channel, P HSPDSCH , and the power of a pilot channel. The Node B may determine P HSPDSCH based on the power available for the data channel, the number of available channelization codes, and a designated number of channelization codes. The UE may determine P OVSF based on the power information from the Node B and the designated number of channelization codes. The UE may estimate at least one SINR of at least one transport block based on P OVSF , determine CQI information for the transport block(s) based on the SINR, and send the CQI information to the Node B.

公开(公告)号：AU2011200556A1

公开(公告)日：2011-03-03

申请号：AU2011200556

申请日：2011-02-10

Applicant: QUALCOMM INC

Inventor： SOLIMAN SAMIR S ,  AGASHE PARAG ARUN ,  STEIN JEREMY ,  VAYANOS ALKINOOS HECTOR ,  GAAL PETER ,  FERNANDEZ-CORBATON IVAN JESUS

IPC: G01S1/00 ,  G01S19/05 ,  G01S19/25 ,  H04B1/707

Abstract: A system and method for assisting an integrated GPS/wireless terminal unit in acquiring one or more GPS satellite signals from the GPS satellite constellation. The invention includes a method for narrowing the PN-code phase search. That is, by accounting for the variables in geographic location and time delay relative to GPS time, the systems and methods of the present invention generate a narrow code-phase search range that enables the terminal unit to more quickly acquire and track the necessary GPS satellites, and thereby more quickly provide accurate position information to a requesting entity.

公开(公告)号：AU2005222374B2

公开(公告)日：2009-07-09

申请号：AU2005222374

申请日：2005-03-08

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  JALALI AHMAD ,  SCHIFF LEONARD NORMAN ,  ANTONIO FRANKLIN PETER

IPC: H04W74/04 ,  H04B1/707

Abstract: Systems, methods and apparatus for configuring and accessing a random access channel in a CDMA communication system are disclosed. The number of users supported by a random access channel can be optimized by assigning a distinct time of arrival to each of a plurality of users. Each of the users can be time synchronized and can transmit data at a time that compensates for a propagation delay to allow the data to arrive at the destination receiver at the assigned time. In a CDMA system, each of the users can transmit data that is spread with the same spreading code, provided the cross correlation properties of the code are sufficient to allow identification of a source that is time offset relative to another user. The time of arrival can be determined based on the number of active users, and can be assigned as often as each transmission by each user.