-
11.发明公开METHOD AND APPARATUS FOR AUTOMATICALLY CORRECTING RECEIVER OSCILLATOR FREQUENCY 有权方法和装置可自动校正接收器振荡器频率
公开(公告)号：EP1908173A4
公开(公告)日：2012-11-14
申请号：EP06787487
申请日：2006-07-17
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT , PAN KYLE JUNG-LIN , YANG RUI , KEARNEY KENNETH P
CPC classification number: H03J7/04
-
12.发明公开OPTIMUM INTERPOLATOR METHOD AND APPARATUS FOR DIGITAL TIMING ADJUSTMENT 有权优化INTERPOLATORVERFAHREN和装置数字定时调整
公开(公告)号：EP1552641A4
公开(公告)日：2006-03-22
申请号：EP03770595
申请日：2003-09-30
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT , GRIECO DONALD M
CPC classification number: H04L7/0029 , H04B1/70756 , H04B1/7077 , H04B1/7117 , H04L7/0004 , H04L25/0202
Abstract: A digital timing synchronizer of a receiver is provided for timing synchronization to a transmitter in a wireless communication system, wherein the received signal has a timing error with respect to a reference code. A channel estimator (11) estimates an initial code phase of the received signal. A code generator (13) generates a timing reference code that is adjustable by integer increments. An interpolation feedback circuit (35) is configured for interpolation and correction of the timing error, whereby the interpolation (14) is achieved through an integer code shift, plus a quantized fractional adjustment selected from a look-up table of quantized fractional adjustment values and their associated predetermined interpolator coefficients, from which a time corrected version of the received signal is produced.
-
公开(公告)号：EP1668805A4
公开(公告)日：2007-03-28
申请号：EP04782998
申请日：2004-09-02
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT , HAIM JOHN W , GRIECO DONALD M
CPC classification number: H04B1/7117 , H04B1/7073 , H04B1/70754 , H04B1/708 , H04B1/7095 , H04B2201/70701
Abstract: A method for determining the validity of a most significant path in a wireless communication system wherein data is transmitted in frame units in a multipath environment begins by accumulating a correlated data sequence N times, each time at a frame offset apart from the previous time. A preliminary noise estimate (PNE) is calculated as an average of the accumulated data values. A preliminary noise threshold (PNT) is calculated according to the equation C1xPNE. A final noise estimate (FNE) is calculated as the average of accumulated data values below the PNT. A final noise threshold (FNT) is calculated according to the equation C2xFNE. The validity of the most significant path is determined if the most significant path value is greater than the FNT.
-
14.发明公开METHOD AND APPARATUS FOR COMBINING SPACE-FREQUENCY BLOCK CODING, SPATIAL MULTIPLEXING AND BEAMFORMING IN A MIMO-OFDM SYSTEM 审中-公开方法和设备空间频率块编码，空分复用和波束组合形成的MIMO-OFDM系统
公开(公告)号：EP1815630A4
公开(公告)日：2007-11-28
申请号：EP05848783
申请日：2005-11-01
Applicant: INTERDIGITAL TECH CORP
Inventor： KWAK JAEYOUNG , KOO CHANG-SOO , OLESEN ROBERT LIND , BULTAN AYKUT , OZLUTURK FATIH
CPC classification number: H04L1/0606 , H04B7/0408 , H04B7/0413 , H04B7/0697 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/04 , H04L5/0007 , H04L25/0248 , H04L27/2601 , H04L27/2626 , H04L27/2647
Abstract: The invention relates to a method and a transmitter for transmitting data using multiple-input multiple-output, MIMO, orthogonal frequency division multiplexing, OFDM, the method comprising: a transmitter generating at least one input data stream; the transmitter generating a plurality of spatial streams; the transmitter determining a transmission coding scheme, and processing the input data stream in accordance with the transmission coding scheme to generate at least two spatial streams, the transmission coding scheme being one of spatial multiplexing, SM, without frequency diversity, FD, wherein one data symbol is sent per one sub-carrier for each spatial stream; and the transmitter transmitting the at least two spatial streams via the generated spatial streams.
-
15.发明公开
公开(公告)号：EP1779623A4
公开(公告)日：2007-10-31
申请号：EP05785474
申请日：2005-08-11
Applicant: INTERDIGITAL TECH CORP
Inventor： KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
CPC classification number: H04L1/0606 , H04B7/0417 , H04B7/0626 , H04B7/0632 , H04B7/066 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L5/0007 , H04L5/0023 , H04L5/006 , H04L27/156 , H04L27/2626 , H04L2027/0046 , Y02D50/10
Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.
Abstract translation: 本发明涉及一种用于在正交频分复用（OFDM）无线通信系统中实现空间频率块编码（SFBC）的方法和装置。本发明适用于这两种闭环模式和开环模式。 在闭环模式中，功率负载和自波束形成是基于信道状态信息（CSI）进行。 一种信道编码后的数据流被多路复用成两个或多个数据流。 电力负荷是基于CSI在每个复用数据流的执行。 SFBC编码执行对每个成对的副载波的数据流。 然后，自波束形成执行基于CSI分发自束多个发射天线。 功率负载可以在两个或更多个SFBC编码数据块或每个本征模式来执行。 另外，功率负载可以跨越子载波或子载波组来执行用于弱本征模式。
-
Patent Agency Ranking16.发明公开
公开(公告)号：EP1687915A4
公开(公告)日：2006-12-27
申请号：EP04810253
申请日：2004-11-03
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT , GRIECO DONALD M , DENNEAN CHARLES , PAN JUNG-LIN
CPC classification number: H04W56/0005 , H04B1/70757 , H04B7/2668 , H04B2201/70701
Abstract: A method and system for uplink (UL) synchronization of an uplink transmission from a plurality of wireless transmit/receive units (WTRUs) to a Node-B in a code division multiple access (CDMA) system. A Node-B receives a transmission including a UL synchronization (SYNC_UL) sequence from a WTRU. A sampler samples the transmission at a sampling rate which is higher than a chip rate. The samples are down-sampled and the SYNC_UL sequence is detected at a lower rate. A first significant path location of the detected SYNC_UL sequence is determined, and based on the first significant path location, a final significant path location is determined. The final significant path location is quantized and UpPCHPOS is transmitted to the WTRU to adjust a UL transmission timing.
-
公开(公告)号：EP1433266A4
公开(公告)日：2005-02-02
申请号：EP02731342
申请日：2002-04-15
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT , GRIECO DONALD
IPC: H04B1/7085 , H04B1/709 , H04L7/02 , H04B1/707
CPC classification number: H04B1/7085 , H04B1/709 , H04L7/0029
Abstract: The UE is in communication with one of the plurality of base stations and receives a communication signal from the base station through the CDMA receiver. The communication signal is correlated by said receiver using a delay locked code tracking loop (10), that estimates and tracks a channel delay of the communication signal. The tracking loop comprises a reference code generator (16) for generating a reference code signal and an interpolator (11) for generating timed signal versions in response to the receipt of said communication. A timed signal correlator (12a, 12b, 13a; 13b), also included in the tracking loop for correlating at least two of the timed signal versions with the code reference signal. The result of the correlation is used for generating an error signal. An automatic power normalization loop (APN), that is responsive to the interpolator (11), generates a power error signal that normalizes the error signal through a normalization circuit (14).
-
公开(公告)号：CA2771267C
公开(公告)日：2016-03-15
申请号：CA2771267
申请日：2005-08-11
Applicant: INTERDIGITAL TECH CORP
Inventor： KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen- beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen- beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.
-
公开(公告)号：AU2011265400A1
公开(公告)日：2012-01-19
申请号：AU2011265400
申请日：2011-12-21
Applicant: INTERDIGITAL TECH CORP
Inventor： KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SF8C) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CS1 on each of the multiplexed data streams. SFBC encoding is preformed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute elgenbemas to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across the subcarriers or subcarrier groups for weak eigenmodes. r CO LuL co COMBNER C3r LuU Cf) C c:) FETE L LMADING UNIT C [ FEE UNIT IFPT UNIT C Co) f- POWER LOADING UNIT
-
公开(公告)号：AU2009201306B8
公开(公告)日：2012-01-19
申请号：AU2009201306
申请日：2009-04-03
Applicant: INTERDIGITAL TECH CORP
Inventor： OLESEN ROBERT LIND , PASAD KALPENDU R , KOO CHANG-SOO , OZLUTURK FATIH M , KWAK JAEYOUNG , ZEIRA ELDAD , HUANG YUEJIN , BULTAN AYKUT
Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is preformed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbemas to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across the subcarriers or subcarrier groups for weak eigenmodes.
-
-
-
-
-
-
-
-
-
Search Results
112
records
(took 0.025 seconds)
