公开(公告)号：US06904036B2

公开(公告)日：2005-06-07

申请号：US10077527

申请日：2002-02-15

申请人： Jung-Lin Pan ,  Parthapratim De ,  Ariela Zeira

发明人： Jung-Lin Pan ,  Parthapratim De ,  Ariela Zeira

IPC分类号： H04B1/707 ,  H04B1/7097 ,  H04B7/204 ,  H04L5/22 ,  H04Q7/38 ,  H04L12/28

CPC分类号： H04B1/71052 ,  H04B1/71055

摘要： A time division duplex using code division multiple access base station receives a plurality of data signals in a time slot. Each data signal experiences a similar channel response. The base station receives a combined signal over the shared spectrum in a time slot. The combined signal comprises the plurality of data signals. The combined signal is sampled at a multiple of a chip rate of the combined signal. The similar channel response is estimated. A channel response matrix or a channel correlation matrix is constructed based on in part the estimated channel response. A spread data vector is determined based on in part a fast fourier transform (FFT) decomposition of a circulant version of the channel response or channel correlation matrix. The spread data vector is despread to recover data from the matrix.

摘要翻译： 使用码分多址基站的时分双工在时隙中接收多个数据信号。 每个数据信号经历类似的信道响应。 基站在时隙中通过共享频谱接收组合信号。 组合信号包括多个数据信号。 组合信号以组合信号的码片速率的倍数进行采样。 估计类似的信道响应。 基于估计的信道响应部分构建信道响应矩阵或信道相关矩阵。 基于信道响应或信道相关矩阵的循环版本的部分快速傅立叶变换（FFT）分解来确定扩展数据向量。 扩展数据向量被解扩以从矩阵中恢复数据。

公开(公告)号：US06625203B2

公开(公告)日：2003-09-23

申请号：US10037710

申请日：2001-12-31

申请人： Parthapratim De ,  Jung-Lin Pan ,  Ariela Zeira

发明人： Parthapratim De ,  Jung-Lin Pan ,  Ariela Zeira

IPC分类号： H04B1400

CPC分类号： H04B1/7105

摘要： 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 &Lgr;(k) is determined by taking the fourier transform of the block entries of the block column. An inverse of &Lgr;(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.

摘要翻译： 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，通过对块列的块条目进行傅里叶变换来确定K乘K矩阵Lambd <（k）>。 将Lambd <（k）>的倒数乘以傅立叶变换的结果。 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：US20100254440A1

公开(公告)日：2010-10-07

申请号：US12819516

申请日：2010-06-21

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

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

IPC分类号： H04B1/707

CPC分类号： H04B1/7105 ,  H04B1/71052 ,  H04B2201/70707 ,  H04L25/0212

摘要： A transmitter site transmits a plurality of different data signals at a chip rate over a shared spectrum in a code division multiple access communication system. Each transmitted data signal experiences a similar channel response. A combined signal of the transmitted data signals is received. The combined signal is sampled at a multiple of the chip rate. The channel response for the combined signal is determined. A spread data vector is determined using the combined signal samples and the estimated channel response. The data of the different data signals is determined using the spread data vector.

摘要翻译： 发射机站在码分多址通信系统中通过共享频谱以码片速率发送多个不同的数据信号。 每个发送的数据信号经历类似的信道响应。 接收发送的数据信号的组合信号。 组合信号以芯片速率的倍数进行采样。 确定组合信号的信道响应。 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。 使用扩展数据向量来确定不同数据信号的数据。

公开(公告)号：US07715305B2

公开(公告)日：2010-05-11

申请号：US11370113

申请日：2006-03-07

申请人： Jung-Lin Pan ,  Ariela Zeira ,  Parthapratim De

发明人： Jung-Lin Pan ,  Ariela Zeira ,  Parthapratim De

IPC分类号： H04J11/00 ,  H04B7/216 ,  H04B1/00

CPC分类号： H04B1/71052 ,  H04B1/71055

摘要： A method of recovering data for use in a receiver that simultaneously receives a plurality of code division multiple access data signals, each data signal experiencing a similar channel response. A combined signal over the shared spectrum in a time slot is received and sampled. The combined signal comprises the plurality of data signals. The sampled signal is used to estimate the similar channel response, and a channel response matrix is constructed. A channel correlation matrix is constructed based in part on the estimated channel response matrix. A fast Fourier transform (FFT) decomposition of a circulant matrix approximation of the channel correlation matrix, and the sampled data signals, are used to determine a spread data vector. The spread data vector is despread to recover data from the matrix.

摘要翻译： 一种恢复用于同时接收多个码分多址数据信号的接收机中的数据的方法，每个数据信号经历类似的信道响应。 在时隙中的共享频谱上的组合信号被接收和采样。 组合信号包括多个数据信号。 采样信号用于估计类似的信道响应，并构建信道响应矩阵。 部分基于估计的信道响应矩阵构建信道相关矩阵。 使用信道相关矩阵和采样数据信号的循环矩阵近似的快速傅立叶变换（FFT）分解来确定扩展数据向量。 扩展数据向量被解扩以从矩阵中恢复数据。

公开(公告)号：US20090060007A1

公开(公告)日：2009-03-05

申请号：US12290772

申请日：2008-11-03

申请人： Parthapratim De ,  Kyle Jung-Lin Pan ,  Ariela Zeira

发明人： Parthapratim De ,  Kyle Jung-Lin Pan ,  Ariela Zeira

IPC分类号： H04B1/707

CPC分类号： H04B1/7105

摘要： 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.

摘要翻译： 码分多址基站通过共享频谱接收K个数据信号。 基站接收并采样具有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。 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：US07414999B2

公开(公告)日：2008-08-19

申请号：US11530919

申请日：2006-09-12

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

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

IPC分类号： H04B7/216

CPC分类号： H04B1/7105 ,  H04B1/71052 ,  H04B2201/70707 ,  H04L25/0212

摘要： A transmitter site transmits a plurality of data signals over a shared spectrum in a code division multiple access communication system. Each transmitted data signal experiences a similar channel response. A combined signal of the transmitted data signals is received. The combined signal is sampled at a multiple of the chip rate. The channel response for the combined signal is determined. A first element of a spread data vector is determined using the combined signal samples and the estimated channel response. Using a factor from the first element determination, remaining elements of the spread data vector are determined. The data of the data signals is determined using the determined elements of the spread data vector.

摘要翻译： 发射机站在码分多址通信系统中通过共享频谱发送多个数据信号。 每个发送的数据信号经历类似的信道响应。 接收发送的数据信号的组合信号。 组合信号以芯片速率的倍数进行采样。 确定组合信号的信道响应。 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，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确定数据信号的数据。

公开(公告)号：US07133412B2

公开(公告)日：2006-11-07

申请号：US10080140

申请日：2002-02-21

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

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

IPC分类号： H04B7/216

CPC分类号： H04B1/7105 ,  H04B1/71052 ,  H04B2201/70707 ,  H04L25/0212

摘要： 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.

公开(公告)号：US07133394B2

公开(公告)日：2006-11-07

申请号：US10080045

申请日：2002-02-21

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

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

IPC分类号： H04B7/216

CPC分类号： H04B1/7105 ,  H04B1/71052 ,  H04B2201/70707 ,  H04L25/0212

摘要： 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.

公开(公告)号：US07110386B2

公开(公告)日：2006-09-19

申请号：US10080212

申请日：2002-02-21

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

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

IPC分类号： H04B7/216

CPC分类号： H04B1/7105 ,  H04B1/71052 ,  H04B2201/70707 ,  H04L25/0212

摘要： 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 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.

公开(公告)号：US07110384B2

公开(公告)日：2006-09-19

申请号：US10080123

申请日：2002-02-21

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

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

IPC分类号： H04V7/216

CPC分类号： H04B1/7105 ,  H04B1/71052 ,  H04B2201/70707 ,  H04L25/0212

摘要： 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 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.