公开(公告)号：US20030026236A1

公开(公告)日：2003-02-06

申请号：US10079334

申请日：2002-02-20

Applicant: InterDigital Technology Corporation

Inventor： Parthapratim De ,  Jung-Lin Pan ,  Ariela Zeira

IPC: H04B007/216

CPC classification number: H04B1/7105

Abstract: A code division multiple access user equipment receives K data signals over a shared spectrum. The user equipment receives and samples a combined signal having the K transmitted data signals. A combined channel response matrix is produced. A block column of a cross correlation matrix is determined using the combined channel response matrix. Each block entry of the block column is a K by K matrix. Each block entry of the block column is a K by K matrix. A fourier transform of a complex conjugate transpose of the combined channel response matrix multiplied to the combined signal samples is taken. An inverse of a fourier transform of each block entry is multiplied to a result of the fourier transform to produce a fourier transform of the data vector. An inverse fourier transform of the data vector fourier transform is taken to produce data of the K signals.

Abstract translation: 码分多址用户设备通过共享频谱接收K个数据信号。 用户设备接收并采样具有K个发送的数据信号的组合信号。 产生组合的通道响应矩阵。 使用组合信道响应矩阵来确定互相关矩阵的块列。 块列的每个块条目是K乘K矩阵。 采用乘以组合信号样本的组合信道响应矩阵的复共轭转置的傅立叶变换。 将每个块条目的傅立叶变换的倒数乘以傅里叶变换的结果，以产生数据向量的傅立叶变换。 采用数据向量傅立叶变换的逆傅立叶变换来产生K信号的数据。

公开(公告)号：US20020168994A1

公开(公告)日：2002-11-14

申请号：US10100383

申请日：2002-03-18

Applicant: InterDigital Technology Corporation

Inventor： Stephen E. Terry ,  Stephen G. Dick ,  James M. Miller ,  Eldad Zeira ,  Ariela Zeira

IPC: H04B007/00

CPC classification number: H04W52/146 ,  H04L5/1469 ,  H04W52/228 ,  H04W52/24 ,  H04W52/241 ,  H04W52/242 ,  H04W52/243 ,  H04W52/246 ,  H04W52/247 ,  H04W52/26 ,  H04W72/085 ,  H04W88/02 ,  H04W88/08 ,  Y02D70/00

Abstract: In a wireless digital communication system employing code-division multiple access (CDMA) technology, a method in which adaptive modulation and coding (AM&C) is utilized in order to achieve improved radio resource utilization and provide increased data rates for user services in which the base station measures up link interference on all time slots received from mobile terminals (UEs) and determines the need for uplink control channel; the base station transmitting to the UE the allocation of specific uplink control channels indicating uplink interference in the time slot and potentially the quality margin; the UE determining appropriate uplink power level based on a path loss determination made by the UE, uplink interference and the quality margin; the UE initiating an uplink common control transmission responsive to these determinations.

Abstract translation: 在采用码分多址（CDMA）技术的无线数字通信系统中，利用自适应调制和编码（AM＆C）来实现改进的无线电资源利用并为用户服务提供增加的数据速率的方法，其中基站 测量从移动终端（UE）接收的所有时隙上的链路干扰并确定对上行链路控制信道的需要; 所述基站向所述UE发送指示所述时隙中的上行链路干扰的特定上行链路控制信道的分配，并且潜在的所述质量裕度; 所述UE基于由所述UE做出的路径损耗确定，上行链路干扰和所述质量裕度来确定适当的上行链路功率电平; UE响应于这些确定发起上行链路公共控制传输。

公开(公告)号：US20020168944A1

公开(公告)日：2002-11-14

申请号：US10029569

申请日：2001-12-21

Applicant: InterDigital Technology Corporation

Inventor： Stephen E. Terry ,  Stephen G. Dick ,  James M. Miller ,  Eldad Zeira ,  Ariela Zeira

IPC: H04B017/00

CPC classification number: H04W72/087 ,  H04B17/24 ,  H04B17/309 ,  H04B17/382 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0027 ,  H04W72/042 ,  H04W72/085 ,  H04W72/10 ,  H04W72/1231 ,  H04W72/1278

Abstract: A wireless digital communication method for communicating between a base station and a plurality of user equipment mobile terminals (UEs) and employs adaptive modulation and coding (AM&C) to achieve improved radio resource utilization and provide optimum data rates for user services. Blocks of downlink (DL) data are received by the base station which requests downlink DL channel quality measurements only from those mobile terminals (UEs) with pending downlink transmissions. The UEs respond to the request by measuring and reporting DL channel quality to the base station, which then allocates resources such that the UEs will make best use of radio resources. The base station notifies the UEs of the physical channel allocation indicating the modulation/coding rate and allocated slots followed by transmission of blocks of downlink data which are transmitted to the UEs.

Abstract translation: 一种用于在基站和多个用户设备移动终端（UE）之间进行通信并且使用自适应调制和编码（AM＆C）来实现改进的无线电资源利用并为用户服务提供最佳数据速率的无线数字通信方法。 下行链路（DL）数据块由仅从具有未决下行链路传输的那些移动终端（UE）请求下行链路DL信道质量测量的基站接收。 UE通过向基站测量和报告DL信道质量来响应该请求，该基站然后分配资源，使得UE将充分利用无线电资源。 基站向UE发送表示调制/编码率的物理信道分配，并且向UE发送下行链路数据块的发送。

公开(公告)号：US20020141372A1

公开(公告)日：2002-10-03

申请号：US10080073

申请日：2002-02-21

Applicant: InterDigital Technology Corporation

Inventor： Parthapratim De ,  Ariela Zeira ,  Jung-Lin Pan ,  Raj Mani Misra

IPC: H04B007/216

CPC classification number: H04B1/7105 ,  H04B1/71052 ,  H04B2201/70707 ,  H04L25/0212

Abstract: A code division multiple access base station is used in receiving a plurality of data signals over a shared spectrum. Each received data signal experiences a similar channel response. A combined signal of the received data signals is received over the shared spectrum. The combined signal is sampled at a multiple of the chip rate. A channel response is estimated. A cross correlation matrix is determined using the estimated channel response. A subblock of the cross correlation matrix is selected. A Cholesky factor for the subblock is determined. The Cholesky factor is extended. The spread data vector is determined using the extended Cholesky factor, a version of the channel response and the samples. Data of the data signals is estimated using the spread data vector.

Abstract translation: 码分多址基站用于在共享频谱上接收多个数据信号。 每个接收的数据信号经历类似的信道响应。 接收的数据信号的组合信号通过共享频谱接收。 组合信号以芯片速率的倍数进行采样。 估计频道响应。 使用估计的信道响应来确定互相关矩阵。 选择互相关矩阵的子块。 确定子块的Cholesky因子。 Cholesky因子得到延长。 扩展数据向量使用扩展的Cholesky因子，信道响应的版本和样本来确定。 使用扩展数据向量来估计数据信号的数据。

公开(公告)号：US20020141366A1

公开(公告)日：2002-10-03

申请号：US10079737

申请日：2002-02-21

Applicant: InterDigital Technology Corporation

Inventor： Parthapratim De ,  Ariela Zeira ,  Jung-Lin Pan ,  Raj Mani Misra

IPC: H04B007/216

CPC classification number: H04B1/7105 ,  H04B1/71052 ,  H04B2201/70707 ,  H04L25/0212

Abstract: A code division multiple access user equipment is used in receiving a plurality of data signals over a shared spectrum. Each received data signal experiences a similar channel response. A combined signal of the received data signals is received over the shared spectrum. The combined signal is sampled at a multiple of the chip rate. A channel response is estimated as a channel response matrix at the multiple of the chip rate. A padded version of a spread data vector of a size corresponding to the multiple chip rate using a column of the channel response matrix, the estimated channel response matrix, the samples and a fourier transform. The spread data vector is estimated by eliminating elements of the padded version so that the estimated spread data vector is of a size corresponding to the chip rate.

Abstract translation: 码分多址用户设备用于在共享频谱上接收多个数据信号。 每个接收的数据信号经历类似的信道响应。 接收的数据信号的组合信号通过共享频谱接收。 组合信号以芯片速率的倍数进行采样。 信道响应被估计为码片速率倍数的信道响应矩阵。 使用信道响应矩阵的列，估计的信道响应矩阵，样本和傅里叶变换来对应于多码片速率的大小的扩展数据矢量的填充版本。 通过消除填充版本的元素来估计扩展数据向量，使得估计的扩展数据向量具有与码片速率相对应的大小。

公开(公告)号：US20020101845A1

公开(公告)日：2002-08-01

申请号：US10005649

申请日：2001-12-03

Applicant: InterDigital Technology Corporation

Inventor： Younglok Kim ,  Ariela Zeira

IPC: H04B007/216

CPC classification number: H04L25/0202 ,  H04B1/707 ,  H04B7/0669 ,  H04L1/0041 ,  H04L1/0618 ,  H04L1/0643

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.

Abstract translation: 本发明是一种用于在包括具有天线阵列和接收机的发射机的CDMA通信系统中发送数据符号的系统和方法。 系统产生符号的第一和第二数据字段，然后对它们进行编码以产生各个符号的复共轭。 包括第一和第二数据字段的第一通信突发，其通过第一天线由中间码分隔开，并且使用由中间码分隔的所述第一和第二数据字段的复共轭产生的第二通信突发， 然后由发射机发射第二天线。 然后，接收器接收并解码第一和第二通信突发，以恢复第一和第二数据字段。

公开(公告)号：US20020089955A1

公开(公告)日：2002-07-11

申请号：US10077076

申请日：2002-02-15

Applicant: InterDigital Technology Corporation

Inventor： Younglok Kim ,  Ariela Zeira

IPC: H04B007/216

CPC classification number: H04B1/707 ,  H04B7/0697 ,  H04L1/0618 ,  H04L1/0631 ,  H04L25/0202 ,  H04L25/03866

Abstract: The present invention is an apparatus for a base station to transmit a data field of symbols. A first data field of symbols is generated and encoded to produce a second data field having complex conjugates of the symbols of the data field. The first and second data fields are then spread, wherein the first data field is spread using a first channelization code and the second data field is spread using a second channelization code. Each of the channelization codes are uniquely associated with one of a first and second antenna. An RF signal including the first and second spread data fields is then transmitted over a first and second antenna.

Abstract translation: 本发明是用于基站发送符号数据字段的装置。 生成并编码符号的第一数据字段以产生具有数据字段的符号的复共轭的第二数据字段。 然后扩展第一和第二数据字段，其中使用第一信道化码扩展第一数据字段，并且使用第二信道化码扩展第二数据字段。 每个信道化码与第一和第二天线之一唯一地相关联。 然后，通过第一和第二天线发射包括第一和第二扩展数据字段的RF信号。

公开(公告)号：US20040240586A1

公开(公告)日：2004-12-02

申请号：US10867508

申请日：2004-06-14

Applicant: InterDigital Technology Corporation

Inventor： Bin Li ,  Robert A. DiFazio ,  Ariela Zeira

IPC: H04L027/22

CPC classification number: H04L1/20 ,  H04B17/336

Abstract: An apparatus and method for estimation of signal-to-noise ratio (SNR) with low bias that is effective for both positive SNRs and small to negative SNRs. The estimation is based on an iterative solution for the maximum likelihood estimate of the amplitude from which the SNR can be computed. The estimation is applicable for various modulated systems, including BPSK, QPSK and MPSK.

Abstract translation: 用于估计具有低偏差的信噪比（SNR）的装置和方法，其对于正SNR和小到负SNR均有效。 该估计基于可以从其计算SNR的幅度的最大似然估计的迭代解。 该估计适用于各种调制系统，包括BPSK，QPSK和MPSK。

公开(公告)号：US20040196890A1

公开(公告)日：2004-10-07

申请号：US10831902

申请日：2004-04-26

Applicant: InterDigital Technology Corporation

Inventor： Ariela Zeira ,  Fatih M. Ozluturk ,  Sung-Hyuk Shin

IPC: H04B001/40

CPC classification number: H04W52/265 ,  H04B2201/709709 ,  H04W52/08 ,  H04W52/10 ,  H04W52/24 ,  H04W52/241 ,  H04W52/242 ,  H04W52/248 ,  H04W52/54 ,  H04W52/60

Abstract: A spread spectrum time division duplex user equipment uses frames with time slots for communication. It receives power commands and receives a first communication having a transmission power level in a first time slot. It measures a power level of the first communication as received and determines a pathloss estimate based on in part the measured received first communication power level and the first communication transmission power level. The user equipment sets a transmission power level for a second communication in a second time slot from the user equipment based on in part the pathloss estimate weighted by a quality factor and adjusted by the power commands.

Abstract translation: 扩频时分双工用户设备使用具有时隙的帧进行通信。 它接收功率命令并且接收在第一时隙中具有发射功率电平的第一通信。 它测量接收到的第一通信的功率电平，并且部分地基于所测量的接收到的第一通信功率电平和第一通信发送功率电平来确定路径损耗估计。 用户设备部分地基于由质量因子加权并由功率命令调整的路径损耗估计，从用户设备在第二时隙中设置用于第二通信的发送功率电平。

公开(公告)号：US20040196782A1

公开(公告)日：2004-10-07

申请号：US10618227

申请日：2003-07-11

Applicant: InterDigital Technology Corporation

Inventor： Jung-Lin Pan ,  John W. Haim ,  Ariela Zeira

IPC: H04J011/00

CPC classification number: H04L25/0232 ,  H04B2001/6912 ,  H04L27/103 ,  H04L27/2647

Abstract: A low cost method and system for efficiently implementing channel estimation in a wireless communication system using any desired length of a fast Fourier transform (FFT) independent of burst type or signal structure. The hardware complexity required to perform the channel estimation to process a plurality of different burst types is reduced. Simple tail zero-padding is used when the length of FFT is extended to a desired length for more efficient computation.

Abstract translation: 一种用于在无线通信系统中有效实现信道估计的低成本方法和系统，其使用独立于突发类型或信号结构的快速傅里叶变换（FFT）的任何期望长度。 减少执行信道估计以处理多个不同突发类型所需的硬件复杂度。 当FFT的长度扩展到期望的长度以便更有效的计算时，使用简单的尾部零填充。