公开(公告)号：US20020141373A1

公开(公告)日：2002-10-03

申请号：US10080124

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 a shared spectrum. The combined signal is sampled at a multiple of the chip rate. A channel response is estimated. A first element of a spread data vector is determined using the combined signal samples and the estimated channel response. A factor from the first element determination is used to determine remaining elements of the spread data vector. Data of the data signals is estimated using the determined elements of 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。 接收到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。 使用组合的信号样本和估计的信道响应来确定扩展数据向量的第一元素。 使用来自第一元素确定的因子来确定扩展数据向量的剩余元素。 使用所确定的扩展数据矢量的元素来估计数据信号的数据。

公开(公告)号：US20020131384A1

公开(公告)日：2002-09-19

申请号：US10080185

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 at the multiple of the chip rate. The multiple chip rate estimated channel response is combined as an effective chip rate channel response. A spread data vector is determined using the effective samples, the effective channel response 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。 信道响应以芯片速率的倍数估计。 多码片速率估计信道响应被组合为有效的码片速率信道响应。 使用有效样本，有效信道响应和傅立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：US20020126646A1

公开(公告)日：2002-09-12

申请号：US10080140

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. 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：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。