公开(公告)号：US20040063453A1

公开(公告)日：2004-04-01

申请号：US10663528

申请日：2003-09-12

Applicant: InterDigital Technology Corporation

Inventor： Chang-Soo Koo ,  Ariela Zeira ,  Donald Grieco ,  Sung-Hyuk Shin

IPC: H04Q007/20

CPC classification number: H04W52/228 ,  H04W52/08 ,  H04W52/12 ,  H04W52/143 ,  H04W52/146 ,  H04W52/225 ,  H04W52/24

Abstract: The present invention is a system and method which controls outer loop transmit power for transmission power of an uplink/downlink communication in a wireless communication system. The system receives a communication from a base station and determines an error rate on the received communication. The system then distinguishes between static and dynamic channels, produces a static adjustment value, and characterizes the dynamic channels to generate a dynamic adjustment value. The target power level is then adjusted by the static and dynamic adjustment values, setting the transmission power level.

Abstract translation: 本发明是一种在无线通信系统中控制上行链路/下行链路通信的发送功率的外部环路发送功率的系统和方法。 系统接收来自基站的通信，并确定接收到的通信的错误率。 然后，系统区分静态和动态通道，产生静态调整值，并表征动态通道以产生动态调整值。 然后通过静态和动态调整值调整目标功率电平，设置发射功率电平。

公开(公告)号：US20030086394A1

公开(公告)日：2003-05-08

申请号：US10216120

申请日：2002-08-09

Applicant: InterDigital Technology Corporation

Inventor： Eldad Zeira ,  Ariela Zeira ,  Stephen E. Terry

IPC: H04Q007/00 ,  H04J003/00

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 from the serving base station (BCHser); calculating the serving base station received signal code power (RSCPser); receiving the broadcast channel from the target base station (BCHtar); calculating the target base station received signal code power (RSCPtar); determining interference signal code power for the serving base station (ISCPser); determining interference signal code power for the target base station (ISCPtar); calculating RSCPser/ISCPser; calculating RSCPtar/ISCPtar; and determining whether RSCPser/ISCPser is less than RSCPtar/ISCPtar, and if so, commencing handover from the serving base station to the target base station.

Abstract translation: 一种用于确定是否发起移动单元从服务基站到目标基站的切换的时分双工方法，所述方法包括：从服务基站（BCHser）接收广播信道; 计算服务基站接收信号码功率（RSCPser）; 从目标基站（BCHtar）接收广播信道; 计算目标基站接收信号码功率（RSCPtar）; 确定服务基站（ISCPser）的干扰信号码功率; 确定目标基站的干扰信号码功率（ISCPtar）; 计算RSCPser / ISCPser; 计算RSCPtar / ISCPtar; 并确定RSCPser / ISCPser是否小于RSCPtar / ISCPtar，如果是，则从服务基站开始切换到目标基站。

公开(公告)号：US20030086380A1

公开(公告)日：2003-05-08

申请号：US10171285

申请日：2002-06-13

Applicant: InterDigital Technology Corporation

Inventor： Younglok Kim ,  Jung-Lin Pan ,  Ariela Zeira

IPC: H04J003/00

CPC classification number: H04B1/7103 ,  H04B1/7105 ,  H04B1/71055 ,  H04B1/71057 ,  H04L1/20

Abstract: Method and apparatus for interference signal code power noise variance estimation employing a reduced number of samples utilizing the equation 1 null ^ n 2 = T null null i = 1 N sample null null h n null ( i ) null 2 , where 2 T = G null null null ( r ) N sample , where NsamplenullLchestnullNp1nullKmax, where 3 null null ( r ) = [ 1 + ( 1 r - 1 ) null ln null ( 1 - r ) ] - 1 and where 4 r = N sample L chest . As an alternative, a recursive technique may be employed wherein the noise variance is estimated from the ignored coefficients of the estimated channel output and upgraded recursively as per the following: 5 null ^ n 2 = 1 KW null null j = 1 K null null i = 1 W null null h i ( j ) - h ^ i ( j ) null 2 , where nulli(j) are the channel estimates after the post processing and the noise variance estimates {circumflex over (null)}nnull12, and the initial values of nulli(j) are all zeros.

公开(公告)号：US20030068984A1

公开(公告)日：2003-04-10

申请号：US10266882

申请日：2002-10-07

Applicant: InterDigital Technology Corporation

Inventor： Sung-Hyuk Shin ,  Fatih Ozluturk ,  Ariela Zeira ,  Chang-Soo Koo

IPC: H04B001/00 ,  H04B007/00

CPC classification number: H04W52/228 ,  H04W52/08 ,  H04W52/221 ,  H04W52/226 ,  H04W52/242 ,  H04W52/243 ,  H04W52/248 ,  H04W52/36

Abstract: A transmitting station receives a transmit power command and a reference signal. The transmit power command indicates an increase or decrease in transmission power for the transmitting station. A received power level of the reference signal is measured and the measured reference signal received power level is compared to a transmit power level of the reference signal to produce a pathloss estimate of the reference signal. A size of a change in transmit power level is determined using the pathloss estimate. A transmission power level of the transmitting station is adjusted in response to the transmit power command in an amount of the determined change in size. A communication is transmitted at the adjusted transmission power level.

Abstract translation: 发射站接收发射功率命令和参考信号。 发送功率指示表示发送站的发送功率的增加或减少。 测量参考信号的接收功率电平，并将测量的参考信号接收功率电平与参考信号的发射功率电平进行比较，以产生参考信号的路径损耗估计。 使用路径损耗估计来确定发射功率电平变化的大小。 响应于所确定的大小变化量的发射功率命令来调整发射台的发射功率电平。 以调整的发送功率电平发送通信。

公开(公告)号：US20030035394A1

公开(公告)日：2003-02-20

申请号：US10029706

申请日：2001-12-21

Applicant: InterDigital Technology Corporation

Inventor： Eldad Zeira ,  Stephen E. Terry ,  Ariela Zeira

IPC: H04B007/216

CPC classification number: H04W52/367 ,  H04W52/54 ,  H04W72/042 ,  H04W72/085

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

Abstract translation: TTD系统通过添加或改变控制信息来实现动态链路自适应，以通知接收机哪些时隙和代码当前是活动的，哪些时隙应该被避免。 该系统使发射机和接收机同步，使得接收机知道发射机已经将哪个时隙和码用于将编码的复合传输信道映射到物理信道上。 系统尝试避免正在经历传输困难的时隙，同时尝试利用未遇到传输问题的时隙。

公开(公告)号：US20030026325A1

公开(公告)日：2003-02-06

申请号：US10081304

申请日：2002-02-20

Applicant: InterDigital Technology Corporation

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

IPC: H04K001/00

CPC classification number: H04B1/7105

Abstract: A code division multiple access base station receives K data signals over a shared spectrum. The base station 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.

公开(公告)号：US20030021335A1

公开(公告)日：2003-01-30

申请号：US10037710

申请日：2001-12-31

Applicant: InterDigital Technology Corporation

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

IPC: H04K001/00

CPC classification number: H04B1/7105

Abstract: K data signals are transmitted over a shared spectrum in a code division multiple access communication system. A combined signal is received and sampled over the shared spectrum. The combined signal has the K transmitted data signals. A combined channel response matrix is produced using the codes and impulse responses of the K transmitted data signals. A block column of a combined channel correlation matrix is determined using the combined channel response matrix. Each block entry of the block column is a K by K matrix. At each frequency point k, a K by K matrix null(k) is determined by taking the fourier transform of the block entries of the block column. An inverse of null(k) is multiplied to a result of the fourier transform. Alternately, forward and backward substitution can be used to solve the system. An inverse fourier transform is used to recover the data from the K data signals.

Abstract translation: 在码分多址通信系统中，通过共享频谱发送K个数据信号。 组合信号在共享频谱上被接收和采样。 组合信号具有K个发送的数据信号。 使用K个发送的数据信号的代码和脉冲响应来产生组合的信道响应矩阵。 使用组合信道响应矩阵来确定组合信道相关矩阵的块列。 块列的每个块条目是K乘K矩阵。 在每个频点k处，通过采用块列的块条目的傅里叶变换来确定K个K矩阵LAMBD（k）。 LAMBD（k）的反相乘以傅里叶变换的结果。 或者，可以使用前向和后向替换来解决系统。 使用逆傅立叶变换从K个数据信号中恢复数据。

公开(公告)号：US20020167928A1

公开(公告)日：2002-11-14

申请号：US10029651

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: H04B007/216 ,  H04B007/212

CPC classification number: H04J13/16 ,  H04B7/2618

Abstract: A sequence of codes are provided for potential assignment to a user in a wireless hybrid time division multiple access (TDMA)/code division multiple access (CDMA) communication system. At least one timeslot is selected to support the communication. For each selected timeslot, at least one code is selected. If more than one code is selected, the selected codes are consecutive in the provided codes sequence. For at least one of the selected timeslots, an identifier of a first and last code of the selected consecutive codes is signaled. The user receives the signaled identifier and uses the selected consecutive codes, as identified, to support the communication.

Abstract translation: 提供了一系列代码用于在无线混合时分多址（TDMA）/码分多址（CDMA）通信系统中对用户的潜在分配。 选择至少一个时隙来支持通信。 对于每个选定的时隙，至少选择一个代码。 如果选择多个代码，所选代码在提供的代码序列中是连续的。 对于所选择的时隙中的至少一个，发出所选择的连续码的第一个和最后一个码的标识符。 用户接收信号标识符并使​​用所识别的所选择的连续代码来支持通信。

公开(公告)号：US20020159428A1

公开(公告)日：2002-10-31

申请号：US10080045

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. The spread data vector is determined using order recursions by determining a first spread data estimate using an element from the cross correlation matrix and recursively determining further estimates using additional elements of the cross correlation matrix. 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。 通过使用来自互相关矩阵的元素确定第一扩展数据估计并使用互相关矩阵的附加元素递归地确定另外的估计，使用顺序递归来确定扩展数据向量。 使用扩展数据向量来估计数据信号的数据。

公开(公告)号：US20020154599A1

公开(公告)日：2002-10-24

申请号：US10080099

申请日：2002-02-21

Applicant: InterDigital Technology Corporation

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

IPC: H04J011/00 ,  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 column of a channel correlation matrix is determined using the estimated channel response. A spread data vector is determined using the determined column, the estimated channel response, the received combined signal and a fourier transform. 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信道相关矩阵的列。 使用确定的列，估计的信道响应，接收的组合信号和傅里叶变换来确定扩展数据向量。 使用扩展数据向量来估计数据信号的数据。