专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2008151061A1 CHANNEL CODING AND RATE MATCHING FOR LTE CONTROL CHANNELS 审中-公开
标题翻译： LTE控制信道的信道编码和速率匹配
公开(公告)号：WO2008151061A1
公开(公告)日：2008-12-11
申请号：PCT/US2008/065388
申请日：2008-05-30
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , SHIN, Sung-Hyuk , GRIECO, Donald, M. , SHAH, Nirav, B. , PIETRASKI, Philip, J. , OLESEN, Robert, L.
发明人： SHIN, Sung-Hyuk , GRIECO, Donald, M. , SHAH, Nirav, B. , PIETRASKI, Philip, J. , OLESEN, Robert, L.
IPC分类号： H04L1/00
CPC分类号： H04L1/0071 , H04L1/0043 , H04L1/0059 , H04L1/0067
摘要： A method and apparatus for channel coding and rate matching of the Physical Uplink Control Channel (PUCCH) and the Physical Downlink Control Channel (PDCCH) is disclosed that uses convolutional encoding to code the control channels. Rate matching is performed using a circular buffer based rate matching algorithm. A rate matching module may contain a single interleaver or may alternatively comprise a plurality of sub-block interleavers. Interleaved coded bits may be stored in the circular buffer in an interlaced format, or output streams from separate sub-block interleavers may be stored contiguously. When a plurality of sub-block interleavers are used, different interleaving patterns may be used. Rate matching may use bit puncturing or repetition to match the rate of the available physical channel resource. Rate matched output bits may be interleaved using a channel interleaver.
摘要翻译：公开了用于物理上行链路控制信道（PUCCH）和物理下行链路控制信道（PDCCH）的信道编码和速率匹配的方法和装置，其使用卷积编码来对控制信道进行编码。使用基于循环缓冲器的速率匹配算法来执行速率匹配。速率匹配模块可以包含单个交织器，或者可以包括多个子块交织器。交错编码比特可以以隔行格式存储在循环缓冲器中，或者来自分离的子块交织器的输出流可以被连续地存储。当使用多个子块交织器时，可以使用不同的交织模式。速率匹配可以使用位删截或重复来匹配可用物理信道资源的速率。速率匹配输出位可以使用信道交织器进行交织。

2. 发明申请

WO2006101997A2 CHANNEL ESTIMATION ENHANCED LMS EQUALIZER 审中-公开
标题翻译：信道估计增强LMS均衡器
公开(公告)号：WO2006101997A2
公开(公告)日：2006-09-28
申请号：PCT/US2006/009556
申请日：2006-03-16
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , PIETRASKI, Philip, J.
发明人： PIETRASKI, Philip, J.
IPC分类号： H03H7/40 , H03D1/04
CPC分类号： H03H21/0043 , H03H2021/0056 , H04L25/0226 , H04L25/03019 , H04L2025/03496 , H04L2025/03611
摘要： The present invention is related to an enhanced equalizer using channel estimation. A scaled version of a channel estimate is used as an expected average behavior of the product of a transmitted signal and a received signal to implement Griffith algorithm. The present invention also uses advance or prediction of a channel estimate to overcome the lag problem inherent in a least means square (LMS) algorithm in a time varying channel. Therefore, the present invention enables the use of a small step size while attaining the same tracking capability with a large step size. A channel estimate at some time in the future is used for updating equalizer filter tap coefficients. This may be performed with a prediction filter. Alternatively, a delay may be introduced in the input data to the filter tap coefficient generator, which makes a channel estimate look like a prediction to the filter tap coefficient generator.
摘要翻译：本发明涉及使用信道估计的增强均衡器。信道估计的缩放版本被用作发射信号和接收信号的乘积的预期平均行为以实现Griffith算法。本发明还使用信道估计的提前或预测来克服时变信道中最小均方（LMS）算法中固有的滞后问题。因此，本发明能够在以大的步长获得相同的跟踪能力的同时使用小的步长。将来某个时间的信道估计用于更新均衡器滤波器抽头系数。这可以用预测滤波器来执行。或者，可以将输入数据中的延迟引入到滤波器抽头系数发生器，这使得信道估计看起来像滤波器抽头系数发生器的预测。

3. 发明申请

WO2006062767A2 LOW COMPLEXITY ADAPTIVE CHANNEL ESTIMATION 审中-公开
标题翻译：低复杂自适应信道估计
公开(公告)号：WO2006062767A2
公开(公告)日：2006-06-15
申请号：PCT/US2005/043121
申请日：2005-11-30
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , PIETRASKI, Philip, J.
发明人： PIETRASKI, Philip, J.
IPC分类号： G06F3/033
CPC分类号： H04L25/0228 , H04L25/0212
摘要： 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.
摘要翻译：提供了一种用于从至少一个相对移动的无线发射/接收单元（WTRU）接收的无线通信信号的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器件中。索引发生器将移动单元速度和SNR的估计值与特定的滤波器系数相匹配，并且选择相应的索引值，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若干信道估计，基于相关联的最小均方误差或最高SNR，选择最终估计。

4. 发明申请

WO2006058219A3 EMBEDDING LOCATION INFORMATION IN CONTENT OBJECTS 审中-公开
公开(公告)号：WO2006058219A3
公开(公告)日：2006-06-01
申请号：PCT/US2005/042755
申请日：2005-11-23
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , PIETRASKI, Philip, J.
发明人： PIETRASKI, Philip, J.
IPC分类号： G06F17/30
摘要： A method for embedding location information in a content object created on a content creation device begins by obtaining location information relating to the current location of the content creation device. The content object is created and the location information is embedded into the content object. A method for displaying location information in connection with a content object begins by selecting a content object to view. The embedded location information is extracted from the selected content object. The location information is interpreted to determine user-friendly location information. The user-friendly location information is displayed with the selected content object.

5. 发明申请

WO2004047461A2 COMMUNICATION SYSTEM AND METHOD USING SIGNAL TO NOISE RATIO ESTIMATION FOR SCALING IN PROCESSING RECEIVED WIRELESS COMMUNICATION SIGNALS 审中-公开
标题翻译：通信系统和使用信号进行噪声估计的方法在处理接收到的无线通信信号时进行缩放
公开(公告)号：WO2004047461A2
公开(公告)日：2004-06-03
申请号：PCT/US2003/036851
申请日：2003-11-17
申请人： INTERDIGITAL TECHNOLOGY CORPORATION
发明人： STERNBERG, Gregory, S. , YANG, Rui , PIETRASKI, Philip, J. , OLESEN, Robert, Lind
IPC分类号： H04Q
CPC分类号： H04L25/067 , H03M13/35 , H04L1/0045 , H04L1/0071 , H04L1/1812 , H04L1/20 , H04L25/0222
摘要： A system, components and methods provide FEC decoding in a wireless communication system in which signal to noise ratio estimation is used for scaling information captured by a demodulator in processing received wireless communication signals. A preferred wireless transmit receive unit (WTRU) has a channel rate estimation device 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 of the WTRU 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 a function of the channel change rate estimates produce by the channel rate estimation device.
摘要翻译：系统，组件和方法在无线通信系统中提供FEC解码，其中使用信噪比估计来缩放解调器在处理接收的无线通信信号中捕获的信息。优选的无线发射接收单元（WTRU）具有信道速率估计装置，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。 WTRU的信噪比（SNR）估计装置被配置为基于所计算的接收信号样本的观测窗口来产生SNR估计，其中，每个观察窗口使用的采样数量被计算为信道的功能信道速率估计装置产生的变化率估计值。

6. 发明申请

WO2008157638A2 MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) MODE OPTIMIZATION FOR LOW DATA RATES SERVICES 审中-公开
标题翻译：用于低数据速率服务的多输入多输出（MIMO）模式优化
公开(公告)号：WO2008157638A2
公开(公告)日：2008-12-24
申请号：PCT/US2008/067399
申请日：2008-06-18
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , PELLETIER, Benoit , CAVE, Christopher, R. , MARINIER, Paul , ZEIRA, Eldad, M. , PIETRASKI, Philip, J.
发明人： PELLETIER, Benoit , CAVE, Christopher, R. , MARINIER, Paul , ZEIRA, Eldad, M. , PIETRASKI, Philip, J.
IPC分类号： H04L25/03
CPC分类号： H04L25/03343 , H04L2025/03426 , H04W28/06 , H04W48/08 , H04W52/0216 , Y02D70/1244 , Y02D70/1246 , Y02D70/142 , Y02D70/144 , Y02D70/23
摘要： A method and an apparatus are provided for efficient transmission of low-data-rate packet services in a multiple-input multiple-output (MIMO) mode of operations in the presence of high-data-rate packet services. Precoding weight information (PWI) is signaled implicitly to a wireless transmit receive unit (WTRU). A precoding weight vector is signaled in a high speed shared control channel less (HS-SCCH-less) transmission using a new HS-SCCH type P. This explicit PWI signaling approach transmits the PWI with minimum power overhead. The data carried in the HS-SCCH type P is encoded to minimize the required transmitted power. A channel type HS-SCCH type 2M is also described.
摘要翻译：提供了一种用于在存在高数据速率分组业务的情况下以多输入多输出（MIMO）操作模式有效传输低数据速率分组业务的方法和装置。预编码权重信息（PWI）被隐式地发送到无线发射接收单元（WTRU）。使用新的HS-SCCH类型P在低速共享控制信道（HS-SCCH-less）传输中用信号通知预编码权重向量。该显式PWI信令方法以最小功率开销传输PWI。 HS-SCCH类型P中承载的数据被编码以最小化所需的发射功率。还描述了类型为2M的信道类型HS-SCCH。

7. 发明申请

WO2008042255A2 METHOD AND APPARATUS FOR ENCODING CHANNEL QUALITY INDICATOR AND PRECODING CONTROL INFORMATION BITS 审中-公开
标题翻译：编码信道质量指示器和预编程控制信息位的方法和设备
公开(公告)号：WO2008042255A2
公开(公告)日：2008-04-10
申请号：PCT/US2007/020924
申请日：2007-09-28
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , ZEIRA, Eldad , REZNIK, Alexander , YANG, Rui , PIETRASKI, Philip, J. , YANG, Yongwen
发明人： ZEIRA, Eldad , REZNIK, Alexander , YANG, Rui , PIETRASKI, Philip, J. , YANG, Yongwen
IPC分类号： H04L25/03
CPC分类号： H04B7/0456 , G06F11/006 , H04B7/0417 , H04B7/0632 , H04B7/0634 , H04B7/0636 , H04B7/0639 , H04B7/0652 , H04L1/0026 , H04L1/0057 , H04L1/007 , H04L1/0073 , H04L1/06 , H04L1/1671 , H04L65/601 , H04L69/40 , H04L2025/03802 , H04L2209/34
摘要： A method and apparatus for encoding channel quality indicator (CQI) and precoding control information (PCI) bits are disclosed. Each of input bits, such as CQI bits and/or PCI bits, has a particular significance. The input bits are encoded with a linear block coding. The input bits are provided with an unequal error protection based on the significance of each input bit. The input bits may be duplicated based on the significance of each input bit and equal protection coding may be performed. A generator matrix for the encoding may be generated by elementary operation of conventional basis sequences to provide more protection to a most significant bit (MSB).
摘要翻译：公开了一种用于编码信道质量指示符（CQI）和预编码控制信息（PCI）比特的方法和装置。输入比特中的每一个比如CQI比特和/或PCI比特具有特殊意义。输入比特用线性块编码进行编码。基于每个输入位的重要性，输入位具有不等差错保护。输入比特可以基于每个输入比特的重要性而被复制，并且可以执行相等的保护编码。用于编码的生成矩阵可以通过传统基本序列的基本操作来生成，以为最高有效位（MSB）提供更多保护。

8. 发明申请

WO2007109040A3 METHOD AND APPARATUS FOR SWITCHING OPERATING MODES OF A RECEIVER 审中-公开
公开(公告)号：WO2007109040A3
公开(公告)日：2007-09-27
申请号：PCT/US2007/006395
申请日：2007-03-14
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , PIETRASKI, Philip, J.
发明人： PIETRASKI, Philip, J.
IPC分类号： H04L25/03
摘要： In a wireless communication system, a method and apparatus switches operating modes of a receiver receiving data and operating in a first mode. The method comprises determining whether a criteria is met to switch the operating mode of the receiver. The operating mode of the receiver is switched from the first mode to a second mode if the criteria is met.

9. 发明申请

WO2006052404A2 METHOD AND APPARATUS FOR ESTIMATING THE STEP-SIZE OF AN ADAPTIVE EQUALIZER 审中-公开
标题翻译：用于估计自适应均衡器的步长的方法和装置
公开(公告)号：WO2006052404A2
公开(公告)日：2006-05-18
申请号：PCT/US2005/037602
申请日：2005-10-20
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , PIETRASKI, Philip, J. , BELURI, Mihaela , DEMIR, Alpaslan
发明人： PIETRASKI, Philip, J. , BELURI, Mihaela , DEMIR, Alpaslan
IPC分类号： H03D1/04 , H03K5/159
CPC分类号： H04L25/03019 , H04B2201/70701 , H04L2025/03687
摘要： A step-size estimator for controlling the step-size of an adaptive equalizer incorporated in a transceiver, (e.g., a wireless transmit/receive unit (WTRU)). The step-size estimator updates at least one adaptive equalizer tap used by the adaptive equalizer based on an apparent speed of a channel established between the transceiver and another transceiver. The step-size estimator includes a speed estimator, a signal-to-noise ratio (SNR) averager and a step-size mapping unit. The speed estimator is used to estimate the apparent speed of the channel, (i.e., the observed and/or measured rate of change of the channel impulse response). The SNR averager generates a common pilot channel (CPICH) SNR estimate. The step-size mapping unit uses the speed estimate and the CPICH SNR estimate to generate a step-size parameter, μ , and a filter taps leakage factor parameter, α , used by the adaptive equalizer to update the filter tap coefficient.
摘要翻译：用于控制结合在收发器（例如，无线发射/接收单元（WTRU））中的自适应均衡器的步长的步长估计器。步长估计器基于在收发器和另一收发器之间建立的通道的视在速度来更新由自适应均衡器使用的至少一个自适应均衡器抽头。步长估计器包括速度估计器，信噪比（SNR）平均器和步长映射单元。速度估计器用于估计信道的视在速度（即，观测和/或测量的信道脉冲响应的变化速率）。 SNR平均器生成公共导频信道（CPICH）SNR估计。步进大小映射单元使用速度估计和CPICH SNR估计来生成步长大小参数μ和由自适应均衡器使用的滤波器抽头泄漏因子参数a，以更新滤波器抽头系数。

10. 发明申请

WO2005053206A2 WIRELESS COMMUNICATION APPARATUS USING FAST FOURIER TRANSFORMS TO CREATE, OPTIMIZE AND INCORPORATE A BEAM SPACE ANTENNA ARRAY IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING RECEIVER 审中-公开
标题翻译：无线通信设备使用快速傅里叶变换创建，优化并且合并一个正弦波频段多路复用接收机中的一个光束天线阵列
公开(公告)号：WO2005053206A2
公开(公告)日：2005-06-09
申请号：PCT/US2004/038611
申请日：2004-11-19
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , OLESEN, Robert, Lind , REZNIK, Alexander , PIETRASKI, Philip, J. , YANG, Rui
发明人： OLESEN, Robert, Lind , REZNIK, Alexander , PIETRASKI, Philip, J. , YANG, Rui
IPC分类号： H04L
CPC分类号： H04L27/2647 , H04B7/0845 , H04B7/086
摘要： A wireless communication apparatus which uses fast Fourier transforms (FFTs) in an orthogonal frequency division multiplexing (OFDM) receiver which incorporates a beam space antenna array. 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, whereby the order of operations in the OFDM receiver can be interchanged.
摘要翻译：一种在包含波束空间天线阵列的正交频分复用（OFDM）接收机中使用快速傅里叶变换（FFT）的无线通信装置。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，由此OFDM接收机中的操作顺序可以互换。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式