公开(公告)号：WO2006017850A3

公开(公告)日：2007-02-01

申请号：PCT/US2005028450

申请日：2005-08-11

Applicant: INTERDIGITAL TECH CORP ,  OZLUTURK FATIH ,  PIETRASKI PHILIP J

Inventor： OZLUTURK FATIH ,  PIETRASKI PHILIP J

IPC: H04B1/06 ,  H04B7/10 ,  H04M1/00

CPC classification number: H04B7/10 ,  H01Q21/29 ,  H01Q25/00 ,  H04B7/04 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/066 ,  H04B7/0691 ,  H04B7/0697

Abstract: The present invention is related to a method and apparatus for reducing antenna correlation between multiple antennas. A transmitter generates at least two beams with a plurality of antennas. The generated beams are spatially separated to point away each other. Therefore, the transmitted signals travel through different channel conditions and arrive at a receiver mutually uncorrelated. The beams may be generated by antennas having different antenna pattern, or by an array antenna. The beams may be polarized differently. The schemes may be implemented on a subcarrier basis in an orthogonal frequency division multiplexing (OFDM) system. Trellis coded mapping may be utilized for adjacent symbols to be mapped to antennas with low correlation.

Abstract translation: 本发明涉及减少多个天线之间的天线相关性的方法和装置。 发射机产生具有多个天线的至少两个波束。 所生成的光束在空间上分离以指向彼此。 因此，所发送的信号通过不同的信道条件传播并且到达接收机相互不相关。 波束可以由具有不同天线图案的天线或阵列天线产生。 梁可以以不同的方式极化。 这些方案可以在正交频分复用（OFDM）系统中的子载波基础上实现。 网格编码映射可以用于相邻符号以被映射到具有低相关性的天线。

公开(公告)号：WO2006062767A3

公开(公告)日：2006-12-07

申请号：PCT/US2005043121

申请日：2005-11-30

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J

Inventor： PIETRASKI PHILIP J

IPC: H04B1/69 ,  H04B1/707 ,  H04B1/713

CPC classification number: H04L25/0228 ,  H04L25/0212

Abstract: A channel estimation apparatus and method is provided for a wireless communication signal received from at least one relatively mobile wireless transmit/receive unit (WTRU). Predetermined filter coefficients having unique index values are stored in a memory device. An index generator matches estimation values of the mobile unit speed and SNR to a particular filter coefficient, and selects a corresponding index value, whereby the memory performs a look up function according to the index value and outputs a filter coefficient vector. The channel estimation of the wireless communication signal is taken from the output of the filter. Alternatively, a set of parallel filters which run continuously are used to produce several channel estimates, from which the final estimate is selected based on the associated lowest mean square error or highest SNR.

Abstract translation: 为从至少一个相对移动无线发射/接收单元（WTRU）接收的无线通信信号提供信道估计装置和方法。 具有唯一索引值的预定滤波器系数被存储在存储装置中。 索引生成器将移动单元速度和SNR的估计值与特定滤波器系数匹配，并选择对应的索引值，由此存储器根据索引值执行查找功能并输出滤波器系数向量。 无线通信信号的信道估计取自滤波器的输出。 或者，使用连续运行的一组并行滤波器来产生几个信道估计，从​​中根据相关的最小均方误差或最高SNR选择最终估计。

公开(公告)号：WO2005079221A3

公开(公告)日：2005-10-27

申请号：PCT/US2005002812

申请日：2005-02-02

Applicant: INTERDIGITAL TECH CORP ,  STERNBERG GREGORY S ,  TSAI YINGMING ,  PIETRASKI PHILIP J

Inventor： STERNBERG GREGORY S ,  TSAI YINGMING ,  PIETRASKI PHILIP J

IPC: H04B7/00 ,  H04B17/40 ,  H04L1/00 ,  H04L1/20

CPC classification number: H04L1/20 ,  H03M13/3738 ,  H03M13/41 ,  H03M13/653 ,  H04L1/0054 ,  H04L1/0072

Abstract: A method and apparatus for providing fast detection of a high speed shared control channel (HS-SCCH). The HS-SCCH carries information necessary for receiving data via a high speed downlink shared channel (HS-DSCH). The apparatus receives messages transmitted via a plurality of HS-SCCHs. The apparatus measures a channel quality for the messages received via each HS-SCCH. The apparatus performs a threshold test by comparing the channel quality with a predetermined threshold. The apparatus then selects a HS-SCCH having the best channel quality among the HS-SCCHs.

Abstract translation: 一种用于提供高速共享控制信道（HS-SCCH）的快速检测的方法和设备。 HS-SCCH承载经由高速下行链路共享信道（HS-DSCH）接收数据所需的信息。 该设备接收经由多个HS-SCCH发送的消息。 该设备测量经由每个HS-SCCH接收的消息的信道质量。 该设备通过将信道质量与预定阈值进行比较来执行阈值测试。 该装置然后在HS-SCCH中选择具有最佳信道质量的HS-SCCH。

公开(公告)号：WO2004047461A3

公开(公告)日：2004-08-12

申请号：PCT/US0336851

申请日：2003-11-17

Applicant: INTERDIGITAL TECH CORP

Inventor： STERNBERG GREGORY S ,  YANG RUI ,  PIETRASKI PHILIP J ,  OLESEN ROBERT LIND

IPC: H03M13/35 ,  H04L1/00 ,  H04L1/18 ,  H04L1/20 ,  H03M13/45

CPC classification number: H04L25/067 ,  H03M13/35 ,  H04L1/0045 ,  H04L1/0071 ,  H04L1/1812 ,  H04L1/20 ,  H04L25/0222

Abstract: A system, components and methods provide FEC decoding in a wireless communication system in which signal to noise ratio estimation is used for scaling (18) information captured by a demodulator (14) in processing received wireless communication signals (12). A preferred wireless transmit unit (WRTU) has a channel rate estimation device (23) configured to process the received communication signals for the particular communication channel and to produce channel change rate estimates. A signal to noise ratio (SNR) estimation device (16) of the WRTU is configured to produce SNR estimates based on observation windows of a calculated number of samples of the received signal where the number of samples used for each observation window is calculated (25) as a function of the channel change rate estimates produced by the channel rate estimation device (23).

Abstract translation: 系统，组件和方法在无线通信系统中提供FEC解码，其中在处理接收的无线通信信号（12）中使用信噪比估计来缩放由解调器（14）捕获的信息。 优选的无线发射单元（WRTU）具有信道速率估计装置（23），其被配置为处理用于特定通信信道的所接收的通信信号并产生信道变化率估计。 WRTU的信噪比（SNR）估计装置（16）被配置为基于计算出的每个观察窗口使用的样本数的计算的接收信号的样本数的观测窗口来产生SNR估计（25 ）作为由信道速率估计装置（23）产生的信道变化率估计的函数。

公开(公告)号：WO2006101620A3

公开(公告)日：2007-05-31

申请号：PCT/US2006005025

申请日：2006-02-13

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J

Inventor： PIETRASKI PHILIP J

IPC: H03D1/04 ,  H03D1/06 ,  H04B1/10

CPC classification number: H04L1/206 ,  H04B17/336

Abstract: A method and apparatus for correcting symbols of a common pilot channel (CPICH) to generate an accurate signal-to-interference ratio (SIR) estimate in a wireless communication system are disclosed. In one embodiment, a non-stationary mean of a group of the CPICH symbols is estimated, the CPICH symbols are delayed, and the CPICH symbols are corrected by dividing the delayed CPICH symbols by the estimated non-stationary mean of the group of CPICH symbols. In another embodiment, a signal power estimate is generated based on the magnitude of CPICH symbols, a noise power estimate is generated by subtracting the signal power estimate from a total power estimate based on the magnitude of the CPICH symbols, and a SIR estimate is generated for symbols that have undergone a time varying gain by dividing the signal power estimate by the noise power estimate.

Abstract translation: 公开了一种用于校正公共导频信道（CPICH）的符号以在无线通信系统中生成准确的信号干扰比（SIR）估计的方法和装置。 在一个实施例中，估计一组CPICH符号的非平稳平均值，CPICH符号被延迟，并且通过将延迟的CPICH符号除以CPICH符号组的估计非平均平均值来校正CPICH符号 。 在另一个实施例中，基于CPICH符号的幅度产生信号功率估计，通过基于CPICH符号的幅度从总功率估计中减去信号功率估计来产生噪声功率估计，并且产生SIR估计 对于通过将信号功率估计除以噪声功率估计而经历了时变增益的符号。

公开(公告)号：WO2005029742A3

公开(公告)日：2007-01-11

申请号：PCT/US2004027394

申请日：2004-08-24

Applicant: INTERDIGITAL TECH CORP ,  LI BIN ,  STERNBERG GREGORY S ,  PIETRASKI PHILIP J

Inventor： LI BIN ,  STERNBERG GREGORY S ,  PIETRASKI PHILIP J

IPC: H03C3/38 ,  H03C1/00 ,  H03D1/00 ,  H03D1/24 ,  H04J11/00 ,  H04L1/20 ,  H04L5/12 ,  H04L27/00 ,  H04L27/20 ,  H04L27/22 ,  H04L27/36 ,  H04L27/38

CPC classification number: H04L27/38 ,  H04L1/20

Abstract: An improved system and method for estimating one or more parameters, such as amplitude and signal-to-noise ratio, of a received signal, such as an M-QAM or q-ASK signal, is set forth herein. A first embodiment of the invention estimates the amplitude of an M- QAM signal based upon known or ascertainable phase information regarding a plurality of transmitted symbols. A respective set of received symbols corresponding to the plurality of transmitted symbols is recovered (101). Each of the plurality of received symbols is multiplied by a complex unit vector with a phase that is opposite in sign to the complex transmitted data symbol to generate a set of products. The set of products is summed (105), and the real part of the sum of products is then determined. The absolute values of the known transmitted symbols are summed to generate a total magnitude value. The real part of the sum of products is divided (111) by the sum of transmitted magnitude values to generate an estimate of the amplitude of the M-QAM signal.

Abstract translation: 本文阐述了用于估计接收信号（诸如M-QAM或q-ASK信号）的一个或多个参数（诸如振幅和信噪比）的改进的系统和方法。 本发明的第一实施例基于关于多个发送符号的已知或可确定的相位信息来估计M-QAM信号的幅度。 恢复对应于多个发送符号的相应的一组接收符号（101）。 将多个接收到的符号中的每一个乘以具有与符号相反的相位的复数单位向量到复数发送的数据符号，以生成一组乘积。 产品集合（105），然后确定产品总数的实部。 已知发射符号的绝对值被相加以产生总幅值。 产品总和的实部由（111）除以传输的幅值之和，以产生M-QAM信号幅度的估计。

公开(公告)号：WO2005053206A3

公开(公告)日：2006-03-23

申请号：PCT/US2004038611

申请日：2004-11-19

Applicant: INTERDIGITAL TECH CORP ,  OLESEN ROBERT LIND ,  REZNIK ALEXANDER ,  PIETRASKI PHILIP J ,  YANG RUI

Inventor： OLESEN ROBERT LIND ,  REZNIK ALEXANDER ,  PIETRASKI PHILIP J ,  YANG RUI

IPC: H04L20060101 ,  H04L1/02 ,  H04L27/26

CPC classification number: H04L27/2647 ,  H04B7/0845 ,  H04B7/086

Abstract: A wireless communication apparatus (200) which uses fast Fourier transforms (FFTs) in an orthogonal frequency division multiplexing (OFDM) receiver (250) which incorporates a beam space antenna array (205). The beam space antenna array may be implemented with a Butler matrix array. The beam space antenna array may be a circular array, vertical array, or a combination of both circular and vertical arrays, for providing the desired angular antenna coverage. In one embodiment, the antenna array is optimized because the FFTs are linear invariant transform operators (210), whereby the order of operations in the OFDM receiver can be interchanged.

Abstract translation: 一种在包含波束空间天线阵列（205）的正交频分复用（OFDM）接收机（250）中使用快速傅里叶变换（FFT）的无线通信装置（200）。 波束空间天线阵列可以用Butler矩阵阵列来实现。 波束空间天线阵列可以是圆形阵列，垂直阵列或圆形阵列和垂直阵列的组合，用于提供所需的角度天线覆盖。 在一个实施例中，天线阵列被优化，因为FFT是线性不变变换运算符（210），由此OFDM接收机中的操作顺序可以互换。

公开(公告)号：WO2005048031A3

公开(公告)日：2005-12-22

申请号：PCT/US2004034789

申请日：2004-10-21

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  STERNBERG GREGORY S ,  YANG RUI ,  LI BIN

Inventor： PIETRASKI PHILIP J ,  STERNBERG GREGORY S ,  YANG RUI ,  LI BIN

IPC: H04L1/00 ,  H04L1/20 ,  H04L25/02 ,  H04L5/12

CPC classification number: H04L1/0026 ,  H04L1/20 ,  H04L25/0202

Abstract: A method and apparatus for estimating and reporting the quality of a wireless communication channel between a wireless transmit/receive unit (WTRU) and a Node-B. A modulated signal is received from the Node-B over the communication channel and a channel estimation is performed on the modulated signal to provide a channel estimate. In one embodiment, the modulated signal is demodulated based on the channel estimate to provide a demodulated signal and a signal-to-interference (SIR) estimate based on the demodulated signal is obtained. The quality of the communication channel is estimated based on at least the SIR estimate. In an alternate embodiment, a SIR estimate based on the channel estimate is obtained. The quality of the communication channel is estimated based on the SIR estimate and additional information including at least one of delay spread, transmit power and WTRU velocity information.

Abstract translation: 一种用于估计和报告无线发射/接收单元（WTRU）和节点B之间的无线通信信道的质量的方法和装置。 通过通信信道从节点B接收调制信号，并对调制信号执行信道估计以提供信道估计。 在一个实施例中，基于信道估计来解调调制信号以提供解调信号，并且获得基于解调信号的信号干扰（SIR）估计。 至少基于SIR估计来估计通信信道的质量。 在替代实施例中，获得基于信道估计的SIR估计。 基于SIR估计和包括延迟扩展，发射功率和WTRU速度信息中的至少一个的附加信息来估计通信信道的质量。

公开(公告)号：WO2004042982A3

公开(公告)日：2004-07-08

申请号：PCT/US0334725

申请日：2003-10-31

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J

IPC: H04B7/005 ,  H04L1/00 ,  H04L1/20 ,  H04Q7/20

CPC classification number: H04W52/262 ,  H04B17/20 ,  H04B17/24 ,  H04B17/26 ,  H04B17/373 ,  H04B17/382 ,  H04L1/0001 ,  H04L1/0019 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/20 ,  H04W52/143 ,  H04W52/22 ,  H04W52/223 ,  H04W52/226 ,  H04W52/228 ,  H04W52/241

Abstract: A method of improved performance through channel quality prediction for communications systems employing link adaption techniques includes a receiver which makes selective measurements (210) on downlink transmissions, and then stores one or more of the measurements or a channel quality indicator derived therefrom (212). The receiver then retrieves one or more of the past measurements (or the past channel quality estimates themselves), and combines it with current measurements (or the current channel quality estimate), to predict what the channel quality will be at some future time and derive a predictive channel quality indicator (CQI). This predictive CQI, derived from both current channel measurements and at least one past channel measurement, is then sent to the transmitter for use in updating transmission parameters (220).

Abstract translation: 通过使用链路适应技术的通信系统的信道质量预测来提高性能的方法包括对下行链路传输进行选择性测量（210）的接收机，然后存储一个或多个测量值或从其导出的信道质量指示符（212）。 然后，接收器检索一个或多个过去的测量（或过去的信道质量估计本身），并将其与当前测量（或当前信道质量估计）组合，以预测在将来某个时间内信道质量将是什么，并导出 预测信道质量指示符（CQI）。 然后，从当前信道测量和至少一个过去信道测量导出的该预测CQI被发送到发射机，以用于更新传输参数（220）。

公开(公告)号：WO2008085992A2

公开(公告)日：2008-07-17

申请号：PCT/US2008000294

申请日：2008-01-08

Applicant: INTERDIGITAL TECH CORP ,  YE CHUNXUAN ,  REZNIK ALEXANDER ,  SHAH YOGENDRA C ,  PIETRASKI PHILIP J ,  DIFAZIO ROBERT A

Inventor： YE CHUNXUAN ,  REZNIK ALEXANDER ,  SHAH YOGENDRA C ,  PIETRASKI PHILIP J ,  DIFAZIO ROBERT A

CPC classification number: H04L1/1628 ,  H04L1/1819 ,  H04L1/1845 ,  H04L1/1874 ,  H04L12/1868 ,  H04L47/10 ,  H04L47/14 ,  H04L47/15 ,  H04L2001/0093

Abstract: A method for multicasting a packet begins by providing a buffer for each of two user equipments (UEs) in communication with a base station. A determination is made whether there is a previously unsent packet at the base station. A second determination is made whether both UE buffers are non-empty. A non-empty buffer is flushed if there is no previously unsent packet and if one of the buffers is non-empty. A packet is selected to be transmitted if there is a previously unsent packet or if both buffers are non-empty. The buffers are updated based on feedback received from the UEs.

Abstract translation: 通过为与基站通信的两个用户设备（UE）中的每一个提供缓冲器，开始组播分组的方法。 确定在基站处是否存在先前未发送的分组。 第二确定是否两个UE缓冲器都是非空的。 如果没有先前未发送的数据包，并且其中一个缓冲区不为空，则将刷新非空缓冲区。 如果存在先前未发送的分组或者两个缓冲区都不为空，则选择发送分组。 基于从UE接收的反馈来更新缓冲器。