公开(公告)号：CA2635909C

公开(公告)日：2013-09-24

申请号：CA2635909

申请日：2001-12-05

Applicant: INTERDIGITAL TECH CORP

Inventor： KIM YOUNGLOK ,  ZEIRA ARIELA

IPC: H04B1/69 ,  H04B1/00 ,  H04B1/707 ,  H04B7/04 ,  H04B7/06 ,  H04B7/216 ,  H04B7/26 ,  H04L1/06 ,  H04L25/02 ,  H04Q7/38 ,  H04W88/08

Abstract: The present invention is a method for a base station to transmit a data field of symbols. The method consists of generating a first data field of symbols, encoding the first data field to produce a second data field, spreading the first and second data fields using respective first and second channelization codes uniquely associated with respective first and second antennas and transmitting an RF signal including the first and second spread data fields over the first and second antennas. Preferably, the second data field has symbols that are the complex conjugates of the symbols of the first field.

公开(公告)号：CA2480093C

公开(公告)日：2011-12-06

申请号：CA2480093

申请日：2003-03-25

Applicant: INTERDIGITAL TECH CORP

Inventor： HAIM JOHN W ,  OH HYUN-SEOK ,  KIM YOUNGLOK ,  ZEIRA ARIELA ,  DIFAZIO ROBERT A

IPC: H04J3/02 ,  H04B1/18 ,  H04B1/707 ,  H04B1/76 ,  H04B7/216 ,  H04J11/00 ,  H04J13/16 ,  H04Q7/38

Abstract: The present invention is a receiver which includes a blind code detection device (15) for determining the identity of a plurality of channels over which information is to be transmitted when the identity of all channels is not known by the receiver (19). The blind code detection device (15) generates a candidate channel list filled with the identity of selected channels out of the plurality of channels. A multi-user detection device (16), responsive to the blind code detection device (15), processes those channels is the candidate code list.

公开(公告)号：NO329514B1

公开(公告)日：2010-11-01

申请号：NO20032435

申请日：2003-05-28

Applicant: INTERDIGITAL TECH CORP

Inventor： ZEIRA ARIELA ,  KIM YOUNGLOK

IPC: H04B1/00 ,  H04B1/707 ,  H04B7/06 ,  H04B7/26 ,  H04L1/06 ,  H04L25/02 ,  H04Q7/38

Abstract: A base station, comprising a first channelization device to receive data and spread the data with a first channelization code to produce a first spread data field; a second channelization device to receive the same data as the first channelization device and spread the received data with a second channelization code that is different from the first channelization code to produce a second spread data field; a first training sequence device in communication with the first channelization device, the first training sequence device to combine the first spread data field with a first midamble to produce a first communication burst, the first midamble for estimating a channel impulse response; a second training sequence device in communication with the second channelization device, the second training sequence device to combine the second spread data field with a second midamble to produce a second communication burst, the second midamble for estimating a channel impulse response; a first scrambling device to scramble the first spread data field by a scrambling code associated with the base station; a second scrambling device to scramble the second spread data field by the scrambling code associated with the base station; a first diversity antenna to transmit the first communication burst; and a second diversity antenna to transmit the second communication burst.

公开(公告)号：CA2491443C

公开(公告)日：2008-07-29

申请号：CA2491443

申请日：2003-06-23

Applicant: INTERDIGITAL TECH CORP

Inventor： PAN JUNG-LIN ,  KIM YOUNGLOK ,  REZNIK ALEXANDER ,  ZEIRA ARIELA

IPC: H04B1/69 ,  H04B1/707

Abstract: A plurality of communication signals is received. Each communication signal has an associated code. At least two of the communication signals has a different spreading factor. The associated codes have a scrambling code period. A total system response matrix has blocks. Each block has one dimension of a length M and another dimension of a length based on in part M and the spreading factor of each communication. M is based on the scrambling code period. Data of the received plurality of communication signals is received using the constructed system response matrix.

公开(公告)号：CA2460799C

公开(公告)日：2008-06-03

申请号：CA2460799

申请日：2002-09-17

Applicant: INTERDIGITAL TECH CORP

Inventor： ZEIRA ARIELA ,  PAN JUNG-LIN ,  KIM YOUNGLOK

IPC: H04B17/00 ,  H04J3/00 ,  H04B7/216 ,  H04J1/00 ,  H04L1/20

Abstract: Method and apparatus for interference signal code power noise variance estimation employing a reduced number of samples utilizing the equation (15) , where (14), where (I), where (I), where (12) and where (13). As an alternative, a recursive technique may be employed wherein the noise varianc e is estimated from the ignored coefficients of the estimated channel output a nd upgraded recursively as per the following: (II) where .hcirc.i(j) are the channel estimates after the post processing and the noise variance estimates .sigma.n-12, and the initial values of .hcirc.i(j) are all zeros.

公开(公告)号：CA2460579C

公开(公告)日：2008-05-13

申请号：CA2460579

申请日：2002-09-16

Applicant: INTERDIGITAL TECH CORP

Inventor： PAN JUNG-LIN ,  KIM YOUNGLOK

IPC: H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04J13/20

Abstract: A code indexing method for orthogonal variable spreading factor codes (OVSF) introduces a single number mapped to each code. The new code number itself n ot only provides the code signature, but it is also used for the OVSF code generation. In addition, it provides easy and fast generation of the availab le code list without the help of look-up table. This capability improves the dynamic code assignment.

公开(公告)号：CA2431157C

公开(公告)日：2007-07-10

申请号：CA2431157

申请日：2001-12-05

Applicant: INTERDIGITAL TECH CORP

Inventor： ZEIRA ARIELA ,  KIM YOUNGLOK

IPC: H04L7/06 ,  H04B1/707 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04L25/02

Abstract: A system and method for transmitting data symbols in a CDMA communication system including a transmitter having an antenna array and a receiver. The system generates first and second data fields of symbols, then encodes them to produce complex conjugates of the respective symbols. A first communication burst including the first and second data fields, separated by a midamble, over a first antenna, and a second communication burst produced using the complex conjugates of said fir st and second data fields, separated by a midamble, over a second antenna are then transmitted. The receiver receives and, after the first and second burst midambles are canceled, decodes the first and second bursts to recover the first and secon d data fields. A first guard period follows the second data fields of the first burst. A second guard period follows the complex conjugate of the first data fields of the second burst.

公开(公告)号：AT353493T

公开(公告)日：2007-02-15

申请号：AT03739284

申请日：2003-06-23

Applicant: INTERDIGITAL TECH CORP

Inventor： KIM YOUNGLOK ,  PAN JUNG-LIN ,  ZEIRA ARIELA ,  REZNIK ALEXANDER

IPC: H04B1/69

Abstract: A plurality of communication signals is received. Each communication signal has an associated code. At least two of the communication signals has a different spreading factor. The associated codes have a scrambling code period. A total system response matrix has blocks. Each block has one dimension of a length M and another dimension of a length based on in part M and the spreading factor of each communication. M is based on the scrambling code period. Data of the received plurality of communication signals is received using the constructed system response matrix.

公开(公告)号：DE60307282D1

公开(公告)日：2006-09-14

申请号：DE60307282

申请日：2003-06-11

Applicant: INTERDIGITAL TECH CORP

Inventor： KIM YOUNGLOK ,  PAN JUNG-LIN ,  ZEIRA ARIELA ,  REZNIK ALEXANDER

IPC: H04B1/7103 ,  H04B1/707 ,  H04B7/155

Abstract: A method for the simultaneous reception of data from multiple sources having different spreading factors. A plurality of transmission response matrices are generated and grouped together for equal spreading factors. A plurality of spreading factor group matrices are assembled. A base matrix is formed based upon the spreading factor group matrix having a lowest spreading factor. An additional spreading factor group matrix is selected for consideration. Column placement reference index for the base matrix is derived. A reference location for the base matrix is derived. A column set from the selected spreading factor group matrix is derived. The column set is inserted into the base matrix. A total transmission response matrix is assembled.

公开(公告)号：BR0308843A

公开(公告)日：2005-01-04

申请号：BR0308843

申请日：2003-03-25

Applicant: INTERDIGITAL TECH CORP

Inventor： HAIM JOHN W ,  OH HYUN-SEOK ,  KIM YOUNGLOK ,  ZEIRA ARIELA ,  DIFAZIO ROBERT A

IPC: H04B1/707 ,  H04B7/216 ,  H04J11/00 ,  H04Q7/38 ,  H04Q7/00

Abstract: A method for wireless communication is disclosed. Data symbols of a received communication are estimated and own-UE and other codes are detected using the estimated data symbols to generate a candidate code list. The own-UE codes and other-UE codes are then from the candidate code list to include in a detected output list based on thresholds for own-UE codes and other-UE codes.