公开(公告)号：NO20041100L

公开(公告)日：2004-06-14

申请号：NO20041100

申请日：2004-03-16

Applicant: INTERDIGITAL TECH CORP

Inventor： PAN JUNG-LIN ,  KIM YOUNGLOK

IPC: H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04J13/20 ,  H04J13/02

Abstract: A code indexing system for a CDMA communication station that uses orthogonal variable spreading factor (OVSF) codes having a single number mapped to each code. The new code number itself not only provides the code signature, but it is also used for the OVSF code generation. In addition, the system provides easy and fast generation of the available code list without the help of look-up table. This capability improves the dynamic code assignment.

公开(公告)号：NO20041543L

公开(公告)日：2004-04-15

申请号：NO20041543

申请日：2004-04-15

Applicant: INTERDIGITAL TECH CORP

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

IPC: H04B17/00 ,  H04B7/216 ,  H04J1/00 ,  H04J3/00 ,  H04L1/20 ,  H03M7/02 ,  H04J13/00

公开(公告)号：AU2003298522A1

公开(公告)日：2004-03-29

申请号：AU2003298522

申请日：2003-07-09

Applicant: INTERDIGITAL TECH CORP

Inventor： PAN JUNG-LIN ,  KIM YOUNGLOK ,  GRIECO DONALD M

IPC: H04L25/02 ,  H04Q7/38

Abstract: Data is estimated from a received vector comprising a plurality of communications. A received wireless signal is converted to a baseband signal, which is sampled to produce a received vector. Channel responses are estimated for the received communications. The noise variance is estimated. The noise variance is scaled by a scaling factor. Samples are processed using the estimated channel responses and the scaled noise variance to produce a spread data vector. The spread data vector is despread to recover the data of the received wireless signal.

公开(公告)号：CA2491443A1

公开(公告)日：2004-01-08

申请号：CA2491443

申请日：2003-06-23

Applicant: INTERDIGITAL TECH CORP

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

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：AU2003248665A8

公开(公告)日：2003-12-31

申请号：AU2003248665

申请日：2003-06-11

Applicant: INTERDIGITAL TECH CORP

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

IPC: H04B1/7103 ,  H04B1/707 ,  H04B7/155 ,  H04J13/02

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：HK1053589A2

公开(公告)日：2003-10-10

申请号：HK03101256

申请日：2003-02-19

Applicant: INTERDIGITAL TECH CORP

Inventor： DICK STEPHEN G ,  KIM YOUNGLOK ,  BOLOURCHI NADER ,  SHIN SUNG-HYUK

IPC: H04B1/69 ,  H04B7/212 ,  H04B7/26 ,  H04B17/40 ,  H04L1/00 ,  H04L1/06 ,  H04L1/12 ,  H04L1/16 ,  H04L1/18 ,  H04L1/20 ,  H04Q

Abstract: A criterion for biasing a binary decision requiring an unequal protection which utilizes a measured signal to interference ratio (SIR). The SIR may be derived from a determination of channel estimation. The SIR is compared against a threshold, the threshold being selected to bias the decision toward a not acknowledge (NACK) as opposed to an acknowledge (ACK) determination. The technique is advantageous for providing biased binary decisions for high speed downlink packets (HSDP) but may be utilized for both uplink and downlink applications.

公开(公告)号：NO20033336L

公开(公告)日：2003-09-10

申请号：NO20033336

申请日：2003-07-24

Applicant: INTERDIGITAL TECH CORP

Inventor： KIM YOUNGLOK

IPC: H04J99/00 ,  H04B1/7105 ,  H04B1/7115 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04L1/06 ,  H04B1/707

Abstract: The present invention is a method and system for receiving data transmitted using block space time transmit diversity (BSTTD) in a code division multiple access (CDMA) communication system. The system comprises a transmitter, for transmitting a first data field using a first antenna and a second data field using a second antenna, and a receiver. The receiver includes an antenna for receiving the first and second transmitted data fields, and a BSTTD joint detector which determines symbols of the first and second transmitted data fields using a minimum mean square error block linear equalizer model and an approximated Cholesky decomposition of the model.

公开(公告)号：AU2003215287A1

公开(公告)日：2003-09-09

申请号：AU2003215287

申请日：2003-02-19

Applicant: INTERDIGITAL TECH CORP

Inventor： DICK STEPHEN G ,  KIM YOUNGLOK ,  BOLOURCHI NADER ,  SHIN SUNG-HYUK

IPC: H04L1/16 ,  H04J3/24

公开(公告)号：NO20032644L

公开(公告)日：2003-07-29

申请号：NO20032644

申请日：2003-06-11

Applicant: INTERDIGITAL TECH CORP

Inventor： KIM YOUNGLOK ,  ZEIRA ARIELA

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

Abstract: The present invention is 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 a first and second data field of symbols, then encodes them to produce complex conjugates of the respective symbols. A first communication burst including the first and second data fields, which are separated by a midamble, over a first antenna, and a second communication burst produced using said complex conjugates of said first and second data fields, which are separated by a midamble, over a second antenna are then transmitted by the transmitter. The receiver then receives and decodes the first and second communication bursts to recover the first and second data fields.

公开(公告)号：CA2460799A1

公开(公告)日：2003-03-27

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 ,  H04B7/216 ,  H04J1/00 ,  H04J3/00 ,  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.