公开(公告)号：US20050175074A1

公开(公告)日：2005-08-11

申请号：US11010720

申请日：2004-12-13

申请人： Jung-Lin Pan ,  Donald Grieco ,  Aykut Bultan

发明人： Jung-Lin Pan ,  Donald Grieco ,  Aykut Bultan

IPC分类号： H04B1/707

CPC分类号： H04B1/7105 ,  H04B1/7107 ,  H04B1/7115

摘要： Joint detection is performed in a multi-user detector (MUD) using reduced length channel impulse responses and using interference cancellation (IC) in the dimension of delay spread as a whole, whereby several clusters of smaller delay spread are processed. Several clusters of real transmitted paths that are close to each other are grouped together and zeros that occur between the path cluster groups are discarded. Each cluster group has a much shorter delay spread and thus has smaller dimensions of system matrix A. Mutual interference occurring between the path cluster groups is eliminated by applying an interference cancellation technique.

摘要翻译： 在多用户检测器（MUD）中使用减小的长度信道脉冲响应并且在整个延迟扩展的维度中使用干扰消除（IC）来执行联合检测，从而处理较小延迟扩展的几个簇。 彼此靠近的几个真实传输路径的群组被分组在一起，并且在路径群集组之间发生的零被丢弃。 每个簇组具有更短的延迟扩展，因此具有较小的系统矩阵A的维度。通过应用干扰消除技术来消除路径簇组之间发生的相互干扰。

公开(公告)号：US06882849B2

公开(公告)日：2005-04-19

申请号：US10427174

申请日：2003-05-01

申请人： Jung-Lin Pan

发明人： Jung-Lin Pan

IPC分类号： H04B7/26 ,  H04B17/00 ,  H04W72/08 ,  H04Q7/20 ,  H04B15/00

CPC分类号： H04L5/0073 ,  H04B7/2618 ,  H04B2201/709709 ,  H04L5/0037 ,  H04W24/10 ,  H04W28/04 ,  H04W72/082 ,  H04W88/08

摘要： A wireless time division duplex/code division multiple access user equipment measures an interference level in time slots. The interference measurements are transmitted. The transmitted interference measurements enable for each of a plurality of nearby user equipments potentially near the user equipment not in a cell of the user equipment to classify timeslots and to determine non-interfering and interfering ones of the nearby user equipments using the timeslots classifying. Communications are transmitted over timeslots assigned by a received timeslot assignment. The received timeslot assignment based on the determined non-interfering and interfering ones of the nearby user equipments. The received timeslot assignment is received. Communications are received over timeslots assigned by the received timeslot assignment.

摘要翻译： 无线时分双工/码分多址用户设备测量时隙中的干扰电平。 传输干扰测量。 传输的干扰测量使得潜在地在用户设备附近的多个附近用户设备中的每一个不在用户设备的小区中对时隙进行分类，并使用时隙分类来确定附近用户设备中的不干扰和干扰的用户设备。 通过接收时隙分配分配的时隙发送通信。 所接收的时隙分配基于所确定的附近用户设备的不干扰和干扰的。 收到接收到的时隙分配。 通过接收时隙分配分配的时隙接收通信。

公开(公告)号：US06879578B2

公开(公告)日：2005-04-12

申请号：US10077509

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 ,  H04B7/216

CPC分类号： H04B1/71052 ,  H04B1/71055

摘要： A time division duplex using code division multiple access user equipment receives a plurality of data signals in a time slot. Each data signal experiences a similar channel response. The user equipment 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： 使用码分多址用户设备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。 用户设备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：US20050013347A1

公开(公告)日：2005-01-20

申请号：US10753631

申请日：2004-01-08

申请人： Jung-Lin Pan ,  Yuejin Huang ,  Donald Grieco

发明人： Jung-Lin Pan ,  Yuejin Huang ,  Donald Grieco

IPC分类号： H04B1/707

CPC分类号： H04B1/71052 ,  H04B1/71055 ,  H04B2201/70707 ,  H04L25/0206 ,  H04L25/0246

摘要： Symbols are to be recovered from signals received in a shared spectrum. Codes of the signals received in the shared spectrum are processed using a block Fourier transform (FT), producing a code block diagonal matrix. A channel response of the received signals is estimated. The channel response is extended and modified to produce a block circulant matrix and a block FT is taken, producing a channel response block diagonal matrix. The code block diagonal matrix is combined with the channel response block diagonal matrix. The received signals are sampled and processed using the combined code block diagonal matrix and the channel response block diagonal matrix with a Cholesky algorithm. A block inverse FT is performed on a result of the Cholesky algorithm to produce spread symbols. The spread symbols are despread to recover symbols of the received signals.

摘要翻译： 符号将从在共享频谱中接收的信号中恢复。 使用块傅里叶变换（FT）处理在共享频谱中接收的信号的码，产生码块对角矩阵。 估计接收信号的信道响应。 信道响应被扩展和修改以产生块循环矩阵，并采用块FT，产生信道响应块对角矩阵。 码块对角矩阵与信道响应块对角矩阵组合。 使用Cholesky算法使用组合码块对角矩阵和信道响应块对角矩阵对接收到的信号进行采样和处理。 对Cholesky算法的结果执行块反向FT以产生扩展符号。 扩展符号被解扩以恢复接收信号的符号。

公开(公告)号：US06816470B2

公开(公告)日：2004-11-09

申请号：US10171285

申请日：2002-06-13

申请人： Younglok Kim ,  Jung-Lin Pan ,  Ariela Zeira

发明人： Younglok Kim ,  Jung-Lin Pan ,  Ariela Zeira

IPC分类号： H04J300

CPC分类号： H04B1/7103 ,  H04B1/7105 ,  H04B1/71055 ,  H04B1/71057 ,  H04L1/20

摘要： Method and apparatus for interference signal code power noise variance estimation employing a reduced number of samples utilizing the equation σ ^ n 2 = T · ∑ i = 1 N sample ⁢ &LeftBracketingBar; h n ⁢ ( i ) &RightBracketingBar; 2 , where T = G · γ ⁢ ( r ) N sample , where Nsample=Lchest−Np1·Kmax, where γ ⁢ ( r ) = [ 1 + ( 1 r - 1 ) · ln ⁢ ( 1 - r ) ] - 1 and where 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: σ ^ n 2 = 1 KW ⁢ ∑ j = 1 K ⁢ ∑ i = 1 W ⁢ &LeftBracketingBar; h i ( j ) - h ^ i ( j ) &RightBracketingBar; 2 , where ĥi(j) are the channel estimates after the post processing and the noise variance estimates {circumflex over (&sgr;)}n−12, and the initial values of ĥi(j) are all zeros.

公开(公告)号：US06552996B2

公开(公告)日：2003-04-22

申请号：US10040513

申请日：2001-12-28

申请人： Younglok Kim ,  Jung-Lin Pan

发明人： Younglok Kim ,  Jung-Lin Pan

IPC分类号： H04J1300

CPC分类号： H04J13/12 ,  H04J13/0044 ,  H04J13/0048 ,  H04J13/20

摘要： A code indexing method for orthogonal variable spreading factor (OVSF) codes introduces a single number mapped to the each code. The new code number itself not only provides the code signature, but it is also used for the OVSF code generation. In addition, it provides easy and fast generation of the available code list without the help of look-up table. This capability improves the dynamic code assignment.

摘要翻译： 用于正交可变扩展因子（OVSF）码的代码索引方法引入映射到每个代码的单个数字。 新的代码本身不仅提供了代码签名，而且还用于生成OVSF代码。 此外，它可以轻松快速地生成可用的代码列表，而无需查找表的帮助。 此功能可以改进动态代码分配。

公开(公告)号：US08705641B2

公开(公告)日：2014-04-22

申请号：US12984101

申请日：2011-01-04

申请人： Yingming Tsai ,  Guodong Zhang ,  Jung-Lin Pan

发明人： Yingming Tsai ,  Guodong Zhang ,  Jung-Lin Pan

IPC分类号： H04L27/28 ,  H04B1/707

CPC分类号： H04B1/711 ,  H04L5/026 ,  H04L2025/03414

摘要： An orthogonal frequency division multiplexing (OFDM)-code division multiple access (CDMA) system is disclosed. The system includes a transmitter and a receiver. At the transmitter, a spreading and subcarrier mapping unit spreads an input data symbol with a complex quadratic sequence code to generate a plurality of chips and maps each chip to one of a plurality of subcarriers. An inverse discrete Fourier transform is performed on the chips mapped to the subcarriers and a cyclic prefix (CP) is inserted to an OFDM frame. A parallel-to-serial converter converts the time-domain data into a serial data stream for transmission. At the receiver, a serial-to-parallel converter converts received data into multiple received data streams and the CP is removed from the received data. A discrete Fourier transform is performed on the received data streams and equalization is performed. A despreader despreads an output of the equalizer to recover the transmitted data.

摘要翻译： 公开了一种正交频分复用（OFDM）码分多址（CDMA）系统。 该系统包括发射机和接收机。 在发射机处，扩展和副载波映射单元利用复数二次序列码扩展输入数据符号，以产生多个码片，并将每个码片映射到多个副载波中的一个。 对映射到子载波的芯片执行逆离散傅立叶变换，并且将循环前缀（CP）插入到OFDM帧中。 并行到串行转换器将时域数据转换为串行数据流以进行传输。 在接收机处，串并转换器将接收的数据转换成多个接收的数据流，并从接收的数据中移除CP。 对接收的数据流执行离散付里叶变换，并进行均衡。 去扩展器对均衡器的输出进行解扩以恢复发送的数据。

公开(公告)号：US08340153B2

公开(公告)日：2012-12-25

申请号：US13236147

申请日：2011-09-19

申请人： Yingming Tsai ,  Guodong Zhang ,  Jung-Lin Pan

发明人： Yingming Tsai ,  Guodong Zhang ,  Jung-Lin Pan

IPC分类号： H04B1/00

CPC分类号： H04L5/0007 ,  H04L5/0016 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/005 ,  H04L5/0073 ,  H04L27/2601 ,  H04L27/2647

摘要： A hybrid orthogonal frequency division multiple access (OFDMA) wireless transmit/receive unit (WTRU) and method are disclosed. A WTRU includes a transmitter and a receiver. The receiver processes received data to recover data mapped to the subcarriers using OFDMA. The receiver recovers first input data by separating user data from multi-user spread data and recovers second input data from non-spread data.

摘要翻译： 公开了一种混合正交频分多址（OFDMA）无线发射/接收单元（WTRU）和方法。 WTRU包括发射机和接收机。 接收机处理接收到的数据以恢复使用OFDMA映射到子载波的数据。 接收机通过从多用户扩展数据分离用户数据并从非扩展数据中恢复第二输入数据来恢复第一输入数据。

公开(公告)号：US08189648B2

公开(公告)日：2012-05-29

申请号：US12549912

申请日：2009-08-28

申请人： Jung-Lin Pan ,  Younglok Kim ,  Donald M. Grieco

发明人： Jung-Lin Pan ,  Younglok Kim ,  Donald M. Grieco

IPC分类号： H04B1/00 ,  H04B1/10 ,  H04L27/06

CPC分类号： H04B1/71055 ,  H04B1/1027 ,  H04B1/7103 ,  H04L25/0202 ,  H04L25/0204 ,  H04L25/0212 ,  H04L25/0224 ,  H04L25/03006

摘要： Data is estimated from a received vector comprising a plurality of communications. A received wireless signal is converted to a baseband signal, which is sampled to produce a received vector. Channel responses are estimated for the received communications. The noise variance is estimated. The noise variance is scaled by a scaling factor. Samples are processed using the estimated channel responses and the scaled noise variance to produce a spread data vector. The spread data vector is despread to recover the data of the received wireless signal.

摘要翻译： 从包括多个通信的接收向量估计数据。 接收到的无线信号被转换为基带信号，其被采样以产生接收的矢量。 对接收到的通信估计通道响应。 估计噪声方差。 噪声方差用比例因子缩放。 使用估计的信道响应和缩放的噪声方差来处理样本以产生扩展数据向量。 扩展数据向量被解扩以恢复所接收的无线信号的数据。

公开(公告)号：US20110280210A1

公开(公告)日：2011-11-17

申请号：US13192890

申请日：2011-07-28

申请人： Guodong Zhang ,  Jung-Lin Pan ,  Yingming Tsai

发明人： Guodong Zhang ,  Jung-Lin Pan ,  Yingming Tsai

IPC分类号： H04W72/04

CPC分类号： H04W72/1226 ,  H04L1/188 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/006 ,  H04L5/023 ,  H04L27/2602 ,  H04W8/26 ,  H04W52/08 ,  H04W52/146 ,  H04W52/16 ,  H04W52/248 ,  H04W52/48 ,  H04W52/50 ,  H04W72/02 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W74/004 ,  H04W74/0833 ,  H04W74/0866

摘要： A method and apparatus for accessing a contention-based uplink random access channel (RACH) in a single carrier frequency division multiple access (SC-FDMA) system are disclosed. A wireless transmit/receive unit (WTRU) randomly selects a RACH subchannel and a signature among a plurality of available RACH subchannels and signatures. The WTRU transmits a preamble using the selected signature via the selected RACH subchannel at a predetermined or computed transmission power. A base station monitors the RACH to detect the preamble and sends an acquisition indicator (AI) to the WTRU when a signature is detected on the RACH. When receiving a positive acknowledgement, the WTRU sends a message part to the base station. If receiving a negative acknowledgement or no response, the WTRU retransmits the preamble.

摘要翻译： 公开了一种在单载波频分多址（SC-FDMA）系统中访问基于竞争的上行随机接入信道（RACH）的方法和装置。 无线发射/接收单元（WTRU）在多个可用的RACH子信道和签名中随机选择RACH子信道和签名。 WTRU以预定或计算的传输功率经由所选择的RACH子信道使用所选择的签名来发送前导码。 当在RACH上检测到签名时，基站监视RACH以检测前导码，并将捕获指示符（AI）发送到WTRU。 当接收到肯定确认时，WTRU向基站发送消息部分。 如果接收到否定的确认或没有响应，则WTRU重传前导码。