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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.
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公开(公告)号：AU2012203459B2
公开(公告)日：2015-09-17
申请号：AU2012203459
申请日：2012-06-14
Applicant: INTERDIGITAL TECH CORP
Inventor： ZHANG GUODONG , PAN JUNG-LIN , OLESEN ROBERT LIND , TSAI YINGMING
Abstract: A multiple-input multiple-output (MIMO) beamforming-based single carrier frequency division multiple access (SC-FDMA) system is disclosed. At the 5 transmitter, a fast Fourier transform (FFT) is performed on transmission data to generate frequency domain data. The frequency domain transmit data is mapped to assigned subcarriers. An inverse fast Fourier transform (IFFT) is performed on the transmit data mapped to the assigned subcarriers to generate time domain transmit data. The time domain transmit data is transmitted via antennas. At a 10 receiver, an FFT is performed on the received data to generate frequency domain received data. Subcarrier demapping is performed to extract data mapped on the assigned subcarriers. A channel estimator generates a channel matrix which is decomposed into U, D and VH matrices. A channel distortion and interference between transmit and receive antennas are equalized based on the decomposed 15 channel matrices to the extracted frequency domain received data.
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公开(公告)号：CA2623273C
公开(公告)日：2015-06-30
申请号：CA2623273
申请日：2006-09-20
Applicant: INTERDIGITAL TECH CORP
Inventor： SAMMOUR MOHAMMED , GRANDHI SUDHEER A , OLESEN ROBERT LIND
Abstract: In a wireless communication system comprising at least one access point (AP) and a plurality of stations (STAs), a method for transmission management of the wireless medium comprises the AP configuring a Multiple Receiver Aggregate Multi-Poll/Power Save Aggregation Descriptor (MMP/PSAD) frame with scheduled Uplink Transmission Time (ULT) information for the plurality of STAs. The AP then transmits the MMP/PSAD frame to the plurality of STAs. Upon successfully receiving and decoding the MMP/PSAD frame, STAs transmit during their scheduled ULT.
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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
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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.
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Patent Agency Ranking
公开(公告)号：DK1779623T3
公开(公告)日：2010-05-25
申请号：DK05785474
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
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公开(公告)号：AU2009208166A1
公开(公告)日：2009-09-10
申请号：AU2009208166
申请日：2009-08-14
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT , OZLUTURK FAITH , KOO CHANG-SOO , OLESEN ROBERT LIND , KWAK JAEYOUNG
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.
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公开(公告)号：BRPI0516688A
公开(公告)日：2008-09-16
申请号：BRPI0516688
申请日：2005-11-01
Applicant: INTERDIGITAL TECH CORP
Inventor： KWAK JAEYOUNG , KOO CHANG-SOO , OLESEN ROBERT LIND , BULTAN AYKUT , OZLUTURK FATIH
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.
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公开(公告)号：MY133314A
公开(公告)日：2007-11-30
申请号：MYPI20034409
申请日：2003-11-18
Applicant: INTERDIGITAL TECH CORP
Inventor： STERNBERG GREGORY S , YANG RUI , PIETRASKI PHILIP J , OLESEN ROBERT LIND
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 INFORMATION CAPTURED BY A DEMODULATOR (14) IN PROCESSING RECEIVED WIRELESS COMMUNICATION SIGNALS. A PREFERRED WIRELESS TRANSMIT RECEIVE UNIT (WTRU) HAS A CHANNEL RATE ESTIMATION DEVICE (25) 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 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 BY AN OBSERVATION WINDOW SELECTION DEVICE (25) AS A FUNCTION OF THE CHANNEL CHANGE RATE ESTIMATES PRODUCED BY THE CHANNEL RATE ESTIMATION DEVICE (23).(FIG 3)
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公开(公告)号：CA2623710A1
公开(公告)日：2007-04-12
申请号：CA2623710
申请日：2006-09-25
Applicant: INTERDIGITAL TECH CORP
Inventor： OLESEN ROBERT LIND , TSAI ALLAN Y , PAN KYLE JUNG-LIN , ZHANG GUODONG
Abstract: A multiple-input multiple-output (MIMO) beamforming-based single carrier frequency division multiple access (SC-FDMA) system is disclosed. At the transmitter, a fast Fourier transform (FFT) is performed on transmission data to generate frequency domain data. The frequency domain transmit data is mapped to assigned subcarriers. An inverse fast Fourier transform (IFFT) is performed on the transmit data mapped to the assigned subcarriers to generate time domain transmit data. The time domain transmit data is transmitted via antennas. At a receiver, an FFT is performed on the received data to generate frequency domain received data. Subcarrier demapping is performed to extract data mapped on the assigned subcarriers. A channel estimator generates a channel matrix which is decomposed into U, D and V H matrices. A channel distortion and interference between transmit and receive antennas are equalized based on the decomposed channel matrices to the extracted frequency domain received data.
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