公开(公告)号：US20030185192A1

公开(公告)日：2003-10-02

申请号：US10335347

申请日：2002-12-31

Applicant: InterDigital Technology Corporation

Inventor： Fatih Ozluturk ,  Jung-Lin Pan

IPC: H04B007/216

CPC classification number: H04B1/7105 ,  H04B1/62 ,  H04B1/7097 ,  H04B2201/709709 ,  H04L25/03178 ,  H04L25/03343 ,  H04L27/34 ,  H04L2025/03624

Abstract: Data is to be transmitted in a code division multiple access communication system. A channel response is provided as a channel response matrix H approximating a channel that the data will experience after transmission. The data is spread and the spread data is processed with the channel response matrix H. The spread and processed data is transmitted. The data is received and recovered from the transmitted spread and processed data.

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：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：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。

公开(公告)号：US20020126619A1

公开(公告)日：2002-09-12

申请号：US10080125

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 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. 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。 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。

公开(公告)号：US20020003782A1

公开(公告)日：2002-01-10

申请号：US09901289

申请日：2001-07-09

Applicant: InterDigital Technology Corporation

Inventor： Jung-Lin Pan ,  Ariela Zeira

IPC: H04B007/216 ,  H04J003/00

CPC classification number: H04W72/082 ,  H04B1/7103 ,  H04B2201/709709 ,  H04J13/16 ,  H04W16/14 ,  H04W24/10 ,  H04W52/0216 ,  H04W52/0219 ,  H04W72/0446 ,  H04W72/0466 ,  H04W74/04 ,  Y02D70/1242 ,  Y02D70/40

Abstract: Resource units are assigned within a cell of a wireless time division duplex communication system using code division multiple access. Each resource units is associated with a time slot and a code. For selected ones of the cell's resource units, the code interference level is measured during that unit's time slot and using that unit's code. The code interference level is compared to a threshold to determine whether that unit has an acceptable code interference level. Resource units are assigned to communications out of the unit's having acceptable interference levels.

Abstract translation: 在使用码分多址的无线时分双工通信系统的小区内分配资源单元。 每个资源单元与时隙和代码相关联。 对于单元格的资源单元中选定的单元的资源单元，在该单元的时隙中测量代码干扰级别，并使用该单元的代码。 将码干扰电平与阈值进行比较，以确定该单元是否具有可接受的码干扰电平。 资源单位被分配给具有可接受干扰水平的设备中的通信。