公开(公告)号：EP1525696A4

公开(公告)日：2005-08-10

申请号：EP03760273

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 ,  H04J13/02

CPC classification number: H04B1/71052 ,  H04B1/7105 ,  H04B2201/70703 ,  H04B2201/70705

Abstract: A plurality of communication signals have differing spreading codes. Each communication has an associated code comprising chips. For each chip of each communication, a vector of that chip convolved with an impulse response is produced. For each communication, support blocks comprising the chip vectors are produced. A number of the chip vectors in a support block is based on that communication's spreading factor. A system response matrix is assembled. The system response matrix has symbol sub-matrices. Each symbol sub-matrix comprises a support block from each communication. Data of the communications is detected using the symbol response matrix.

Abstract translation: 多个通信信号具有不同的扩展码。 每个通信都有一个包含芯片的相关代码。 对于每个通信的每个码片，产生与脉冲响应卷积的该码片的矢量。 对于每个通信，产生包括码片向量的支持块。 支持块中的许多码片向量基于该通信的扩频因子。 系统响应矩阵被组合。 系统响应矩阵具有符号子矩阵。 每个符号子矩阵包括来自每个通信的支持块。 使用符号响应矩阵检测通信数据。

公开(公告)号：EP1476965A4

公开(公告)日：2005-07-13

申请号：EP03713581

申请日：2003-02-20

Applicant: INTERDIGITAL TECH CORP

Inventor： ZEIRA ARIELA ,  ZEIRA ELDAD

IPC: H04B1/707 ,  H04J13/16 ,  H04W52/00 ,  H04W88/18 ,  H04Q7/36 ,  H04Q7/30

CPC classification number: H04W88/181 ,  H04B2201/709709 ,  H04J13/16 ,  H04W52/346 ,  H04W72/00 ,  H04W72/0466

Abstract: The invention includes various approaches to assigning codes in wireless code division multiple access communication systems. The invention estimates the cross code correlation between codes to base the code assignment. One approach assigns codes having a high cross correlation to users having a low transmission power level. Another approach assigns code groups having a high cross correlation to a same coded composite transport channel. Another approach assigns codes using a cross correlation factor of each code to minimize a system noise rise. Another approach uses transmission or reception diversity to assign bad code groups to users having a different diversity relationship. Another approach uses a diversity factor and a cross code correlation factor to assign codes.

公开(公告)号：EP1474884A4

公开(公告)日：2005-07-06

申请号：EP03709091

申请日：2003-02-12

Applicant: INTERDIGITAL TECH CORP

Inventor： TERRY STEPHEN E ,  ZEIRA ARIELA ,  BOLOURCHI NADER

IPC: H04B7/155 ,  H04B1/707 ,  H04J3/24 ,  H04L1/00 ,  H04L1/18 ,  H04Q7/00

CPC classification number: H04L1/1845 ,  H04L1/0003 ,  H04L1/0006 ,  H04L1/0009 ,  H04L1/1819 ,  H04L1/1874

Abstract: Data of a transport block set is to be transmitted in a wireless communication system. The wireless communication system (figure 5) uses adaptive modulation and coding (34) and has a physical layer hybrid automatic repeat request mechanism (40). Segmentation information for potential segmentation of the transport block set is provided (46). The transport block set is transmitted with a first specified modulation and coding scheme. The transport bock set is received (38) and whether the received transport block set is determined to meet a specified quality. When the specified quality is not met, a repeat request (40) is transmitted. The first specified modulation and coding set is changed to a second specified modulation and coding set. In response to the repeat request, the transmit block set is segmented into a plurality of segments (48) supported by the second specified modulation and coding set (34) in accordance with the provided segmentation information. The segments are transmitted and at least two of the segments are transmitted separately. The transmitted segments are received (38). The segmentation process may be applied more than once for a particular TBS transmission.

公开(公告)号：EP1510014A4

公开(公告)日：2009-04-29

申请号：EP03755391

申请日：2003-05-19

Applicant: INTERDIGITAL TECH CORP

Inventor： ZEIRA ARIELA

IPC: H04J11/00 ,  H04B1/69 ,  H04B1/707 ,  H04B1/713 ,  H04B7/216

CPC classification number: H04J13/0044 ,  H04B1/707 ,  H04B1/7105 ,  H04B2201/70703

Abstract: One aspect of the invention simultaneously estimates data transmitted in a spread spectrum communication system using different spreading factors. A plurality of communication signals are received. Each communication signal has an associated code. At least two of the communication signals has a different spreading factor. The transmitted data is estimated as estimated symbols using codes of a uniform spreading factor. For data transmitted with a spreading factor other than the uniform spreading factor, the estimated symbols of that data is converted to symbols of the code of that data. Another aspect of the invention receives a spread spectrum communication signal having data spread using a plurality of spreading factors. The data of the communication is estimated as estimated symbols using codes of a uniform spreading factor. The estimated symbols are parsed into parcels, where the estimated symbols correspond to data transmitted with a same spreading factor. For parcels not of the uniform spreading factor, the estimated symbols are converted into symbols of the same spreading factor of that parcel.

公开(公告)号：EP1810400A4

公开(公告)日：2008-01-16

申请号：EP05810082

申请日：2005-10-18

Applicant: INTERDIGITAL TECH CORP

Inventor： ZEIRA ARIELA ,  PIETRASKI PHILIP J ,  PAN KYLE JUNG-LIN ,  BELURI MIHAELA ,  YANG RUI

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC classification number: H04L25/03044 ,  H04B1/7097 ,  H04B7/0854 ,  H04L2025/03375 ,  H04L2025/03426 ,  H04L2025/03477 ,  H04L2025/03509 ,  H04L2025/03617

Abstract: A receiver which includes at least one equalizer filter and a tap coefficients generator for implementing receive diversity. The equalizer filter processes a signal derived from signals received by a plurality of antennas. In one embodiment, sample data streams from the antennas are merged into one sample data stream. The merged sample data stream is processed by a single extended equalizer filter, whereby filter coefficients are adjusted in accordance with a joint error signal. A filter coefficient correction term used by the equalizer filter is generated by the tap coefficients generator using a normalized least mean square (NLMS) algorithm. In another embodiment, a plurality of equalizer filters are utilized, whereby each equalizer receives a sample data stream from a specific one of the antennas. In yet another embodiment, the sample data streams are combined after being processed by a plurality of matched filters based on respective estimated channel impulse responses.

公开(公告)号：EP1649604A4

公开(公告)日：2007-01-17

申请号：EP04778184

申请日：2004-07-13

Applicant: INTERDIGITAL TECH CORP

Inventor： REZNIK ALEXANDER ,  LI BIN ,  YANG RUI ,  ZEIRA ARIELA

IPC: H04B1/00 ,  H04B1/7115 ,  H04L25/03 ,  H04Q20060101

CPC classification number: H04B1/7113 ,  H04B1/7115 ,  H04L25/03038 ,  H04L25/03987 ,  H04L2025/03592

Abstract: A receiver which suppresses inter-cluster multipath interference by processing an impulse channel response consisting of two multipath clusters, each cluster having groups of signals with multiple delays. In one embodiment, the receiver includes a single antenna and parallel-connected delay units used to align the groups of signals before being input into respective sliding window equalizers. The outputs of the equalizers are combined at chip level via a combiner which provides a single output. In another embodiment, a Cluster Multipath Interference Suppression (CMIS) circuit is incorporated into the receiver. The CMIS circuit includes a hard decision unit and a plurality of signal regeneration units to generate replicas of the multipath clusters. The replicas are subtracted from the respective outputs of the delay units and the results are input to the respective sliding window equalizers. In another embodiment, multiple antennas are used to receive and process the clusters.

公开(公告)号：EP1425871A4

公开(公告)日：2006-06-28

申请号：EP02768527

申请日：2002-08-13

Applicant: INTERDIGITAL TECH CORP

Inventor： ZEIRA ELDAD ,  ZEIRA ARIELA ,  TERRY STEPHEN E

IPC: H04W36/08 ,  H04B7/26 ,  H04W36/30

CPC classification number: H04W36/30

Abstract: A time division duplex method for determining whether to initiate handover of a mobile unit from a serving base station to a target base station, the method comprises receiving the broadcast channel (52) from the serving base station (BCHser); calculating (54) the serving base station received signal code power (RSCPser); receiving the broadcast channel (56) from the target base station (BCHtar); calculating the target base station (58) received signal code power (RSCPtar); determining interference signal code power (60) for the serving base station (ISCPser); determining interference signal code power (60) for the target base station (ISCPtar); calculating (62) RSCPser/ISCPser; calculating (62) RSCPtar/ISCPtar; and determining whether RSCPser/ISCPser is less than RSCPtar/ISCPtar, and if so, commencing handover (68) from the serving base station to the target base station.

公开(公告)号：EP1540849A4

公开(公告)日：2006-03-22

申请号：EP03752121

申请日：2003-09-09

Applicant: INTERDIGITAL TECH CORP

Inventor： PAN JUNG-LIN ,  HUANG YUEJIN ,  ZEIRA ARIELA

IPC: H04B1/707 ,  H04B7/005 ,  H04L25/03 ,  H04B7/216

CPC classification number: H04B1/71052 ,  H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03522 ,  H04L2025/03605

Abstract: A method of data estimation for a Time Division Duplex (TDD) Code Division Multiple Access (CDMA) system or any other system using an extended algorithm (EA) in preference to a truncated algorithm (TA). The EA avoids implementation errors by choice of proper extended matrices, and accepts the use of one piece of hardware. The EA also obviates loss of multiple signals in the tail part of each data field (215), and avoids errors due to transformation of a Toeplitz matrix to a circulant matrix.

公开(公告)号：EP1483754A4

公开(公告)日：2005-07-06

申请号：EP03709072

申请日：2003-02-11

Applicant: INTERDIGITAL TECH CORP

Inventor： TERRY STEPHEN E ,  BOLOURCHI NADER ,  ZEIRA ARIELA

IPC: H04B7/155 ,  H04B7/26 ,  H04L1/00 ,  H04L1/18 ,  H04L27/26 ,  G08C25/02

CPC classification number: H04L1/0003 ,  H04L1/0009 ,  H04L1/1812 ,  H04L1/1822 ,  H04L1/1845 ,  H04L1/1893 ,  H04L5/0055 ,  H04L27/2608 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/042

公开(公告)号：EP1421725A4

公开(公告)日：2004-11-10

申请号：EP02756979

申请日：2002-08-05

Applicant: INTERDIGITAL TECH CORP

Inventor： ZEIRA ELDAD ,  TERRY STEPHEN E ,  ZEIRA ARIELA

IPC: H04B1/707 ,  H04B1/69 ,  H04B7/005 ,  H04B7/155 ,  H04B7/212 ,  H04B7/216 ,  H04B7/26 ,  H04J3/00 ,  H04J3/22 ,  H04J13/00 ,  H04L5/22 ,  H04W52/36 ,  H04W52/54

CPC classification number: H04W52/367 ,  H04W52/54

Abstract: A UE system implements dynamic link adaptation by adding or changing (Fig. 3E) control information to notify a receiver which timeslots and codes are currently active and which timeslots should be avoided. The UE provides synchronization such that the receiver knows which timeslots and codes the UE has used to map the coded composite transport channel onto physical channels. The UE attempts to avoid the timeslots which are experiencing transmission difficulties, while attempting to utilize the timeslots which are not experiencing transmission problems.