公开(公告)号：EP1813016A4

公开(公告)日：2013-01-16

申请号：EP05815548

申请日：2005-11-01

Applicant: INTERDIGITAL TECH CORP

Inventor： PAN KYLE JUNG-LIN ,  BELURI MIHAELA C ,  PIETRASKI PHILIP J

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159 ,  H04L25/03

CPC classification number: H04L25/03038 ,  H04B1/712 ,  H04B2201/70701 ,  H04L25/03044 ,  H04L2025/03375 ,  H04L2025/03477 ,  H04L2025/03617

公开(公告)号：EP1595346A4

公开(公告)日：2006-09-13

申请号：EP04708578

申请日：2004-02-05

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN ,  GRIECO DONALD M ,  HAIM JOHN W ,  BEDNARZ ANDREW F ,  PIETRASKI PHILIP J ,  GUCCIONE LOUIS J ,  CHITRAPU PRABHAKAR R

IPC: H04B1/707 ,  H04B7/26 ,  H04J3/06 ,  H04L7/02 ,  H04L7/10 ,  H04W48/16 ,  H04W56/00

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/70755 ,  H04B1/709 ,  H04B2201/70701 ,  H04W48/16 ,  H04W56/00

Abstract: A method and system for performing initial cell search is disclosed. Step 1 (208) processing is preformed to detect a peak primary synchronization code (PSC) location (i.e. chip offset or chip location). Step 2 (210) processing is performed to obtain the toffset and code group. Step 3 (212) processing is performed to identify the midamble of a base station with which the WTRU performing the initial cell search may synchronize with.

公开(公告)号：EP1671441A4

公开(公告)日：2008-06-11

申请号：EP04786564

申请日：2004-08-24

Applicant: INTERDIGITAL TECH CORP

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. 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, 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 by the sum of transmitted magnitude values to generate an estimate of the amplitude of the M-QAM signal. Other embodiments of the present invention utilize second-order and fourth-order moments of received samples, a maximum likelihood searching process, or a Kurtosis estimation process to estimate amplitude, noise power, and signal-to-noise ratio of a received signal.

公开(公告)号：EP1810437A4

公开(公告)日：2008-06-04

申请号：EP05824244

申请日：2005-10-25

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J ,  STERNBERG GREGORY S ,  CASTOR DOUGLAS R

IPC: H04L1/00 ,  H04L1/20 ,  H04W24/00 ,  H04W28/04 ,  H04W28/18 ,  H04W48/08

CPC classification number: H04L1/0026 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0021 ,  H04L1/1867 ,  H04W24/00 ,  H04W28/18 ,  H04W48/08 ,  H04W52/12 ,  H04W52/20

Abstract: A method and apparatus for adaptively biasing a channel quality indicator (CQI) used for setting a configuration of communication between a transmitter and a receiver in a wireless communication system. The receiver sends a CQI and positive acknowledgement (ACK)/negative acknowledgement (NACK) messages to the transmitter. The ACK/NACK messages indicate the absence or presence of error, respectively, in a transmitted data packet. The CQI is derived from the signal-to-interference ratio (SIR) and the ACK/NACK messages. The transmitter calculates the block error rate (BLER) of the transmitted data packets based upon the ACK/NACK messages sent from the receiver. The transmitter compares the BLER of the transmitted data packets to a target BLER and biases the CQI based on the comparison in order to achieve the target BLER.

公开(公告)号：EP1875598A4

公开(公告)日：2008-03-26

申请号：EP06734938

申请日：2006-02-13

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J

IPC: H03D1/04 ,  H03D1/06 ,  H04B1/10

CPC classification number: H04L1/206 ,  H04B17/336

公开(公告)号：EP1537678A4

公开(公告)日：2005-12-21

申请号：EP03755821

申请日：2003-09-12

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J ,  DEMIR ALPASLAN ,  GRIECO DONALD M

IPC: H04B1/707

CPC classification number: H04B1/70735 ,  H04B1/70755 ,  H04B1/7083 ,  H04B1/709 ,  H04B1/7103 ,  H04B2201/70707

Abstract: The invention provides embodiments to facilitate cell search. In one embodiment, received samples are split into a plurality of sample sets for processing. Each of the sets is processed and an accumulated result is divided by an estimated noise value. In another embodiment, a code correlator correlates the received signal with a primary synchronization code and an auxiliary code correlator having a same length as the code correlator correlates the received signal with a code having a low cross correlation with the primary synchronization code. In another embodiment, a division of an accumulated result with a noise estimate is performed using indexes of the most significant bits.

Abstract translation: 本发明提供了促进小区搜索的实施例。 在一个实施例中，接收到的样本被分成多个样本集以供处理。 处理每个集合并将累积结果除以估计的噪声值。 在另一实施例中，码相关器将接收信号与具有与码相关器相同长度的主同步码和辅助码相关器相关，所述码相关器将接收信号与具有与主同步码低互相关的码进行相关。 在另一个实施例中，使用最高有效位的索引执行累积结果与噪声估计的划分。

公开(公告)号：EP1573923A4

公开(公告)日：2008-10-08

申请号：EP03796549

申请日：2003-12-03

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J ,  STERNBERG GREGORY S

IPC: H03M13/00 ,  H03M13/29 ,  H03M13/35 ,  H03M13/27

CPC classification number: H03M13/2771 ,  H03M13/005 ,  H03M13/2792 ,  H03M13/2957 ,  H03M13/6362 ,  H03M13/6381 ,  H04L1/0067

Abstract: Detecting, avoiding and/or correcting problematic puncturing patterns in parity bit streams used when implementing punctured Turbo codes is achieved without having to avoid desirable code rates. This enables identification/avoidance of regions of relatively poor Turbo code performance. Forward error correction comprising Turbo coding and puncturing achieves a smooth functional relationship between any measure of performance and the effective coding rate resulting from combining the lower rate code generated by the Turbo encoder (600) with puncturing of the parity bits. In one embodiment, methods to correct/avoid degradations due to Turbo coding are implemented by puncturing interactions when two or more stages of rate matching (610, 620) are employed.

Abstract translation: 当实现收缩Turbo码时，检测，避免和/或校正奇偶比特流中的有问题的删余模式，而不必避免期望的码率。 这使得能够识别/避免Turbo代码性能相对较差的区域。 包括Turbo编码和打孔的前向纠错实现了任何性能测量和由Turbo编码器（600）生成的较低码率码与奇偶校验位的打孔组合所得到的有效码率之间的平滑函数关系。 在一个实施例中，当采用两级或更多级速率匹配（610,620）时，通过对相互作用进行收缩来实现纠正/避免由Turbo编码引起的退化的方法。

公开(公告)号：EP1820282A4

公开(公告)日：2008-04-02

申请号：EP05852407

申请日：2005-11-30

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J

IPC: H04L25/02

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.

公开(公告)号：EP1810400A4

公开(公告)日：2008-01-16

申请号：EP05810082

申请日：2005-10-18

Applicant: INTERDIGITAL TECH CORP

Inventor： ZEIRA ARIELA ,  PIETRASKI PHILIP J ,  PAN KYLE JUNG-LIN ,  BELURI MIHAELA ,  YANG RUI

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC classification number: H04L25/03044 ,  H04B1/7097 ,  H04B7/0854 ,  H04L2025/03375 ,  H04L2025/03426 ,  H04L2025/03477 ,  H04L2025/03509 ,  H04L2025/03617

Abstract: A receiver which includes at least one equalizer filter and a tap coefficients generator for implementing receive diversity. The equalizer filter processes a signal derived from signals received by a plurality of antennas. In one embodiment, sample data streams from the antennas are merged into one sample data stream. The merged sample data stream is processed by a single extended equalizer filter, whereby filter coefficients are adjusted in accordance with a joint error signal. A filter coefficient correction term used by the equalizer filter is generated by the tap coefficients generator using a normalized least mean square (NLMS) algorithm. In another embodiment, a plurality of equalizer filters are utilized, whereby each equalizer receives a sample data stream from a specific one of the antennas. In yet another embodiment, the sample data streams are combined after being processed by a plurality of matched filters based on respective estimated channel impulse responses.

公开(公告)号：EP1685720A4

公开(公告)日：2007-12-05

申请号：EP04811400

申请日：2004-11-18

Applicant: INTERDIGITAL TECH CORP

Inventor： RUDOLF MARIAN ,  DICK STEPHEN G ,  PIETRASKI PHILIP J

IPC: H04W72/04 ,  H04B20060101 ,  H04B7/00 ,  H04B7/26 ,  H04L29/00 ,  H04W72/14

CPC classification number: H04W72/0453 ,  H04L1/0046 ,  H04L1/0061 ,  H04L1/0072 ,  H04L5/0053 ,  H04L5/0091 ,  H04L5/14 ,  H04W48/16 ,  H04W72/0406 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/14

Abstract: A method and wireless communication system for providing channel assignment information used to support an uplink (UL) channel and a downlink (DL) channel. The system includes at least one Node-B and at least one wireless transmit/receive unit (WTRU). The WTRU communicates with the Node-B via a common control channel, the UL channel and the DL channel. The WTRU receives a message from the Node-B via the common control channel. The message includes an indication of whether the message is intended for assigning radio resources to the UL channel or the DL channel. The WTRU determines whether the message is intended for the WTRU and, if so, the WTRU determines whether the message is for assigning radio resources to the UL channel or the DL channel. The WTRU takes an appropriate action based on whether the message is for assigning radio resources to the UL channel or the DL channel.