Rui Yang

6608826, Aug 19, 2003

Apr 24, 2000

09/558686

David K. Mesecher - Huntington Station NY
Rui Yang - Greenlawn NY
Ramon Cerda - West Babylon NY

InterDigital Technology Corporation - Wilmington DE

H04B 7216

370342, 370514, 375376

A continuously adjusted bandwidth phase-locked loop is used by a B-CDMAâ receiver to correct for any deviation, or offset, that may exist between the received radio frequency (RF) carrier signal and the frequency of the first stage LO that converts the received RF carrier signal to an intermediate frequency (IF). The PLL in the receiver includes a filter with an adjustable bandwidth. A wider bandwidth is used during initial acquisition of the received signal. After the PLL has acquired the received carrier signal using the wider bandwidth, the bandwidth of the filter is gradually narrowed to provide a low steady-state error.

6931584, Aug 16, 2005

Nov 17, 2003

10/715153

Gregory S. Sternberg - Great Neck NY, US
Rui Yang - Greenlawn NY, US
Philip J. Pietraski - North Massapequa NY, US
Robert Lind Olesen - Huntington NY, US

InterDigital Technology Corporation - Wilmington DE

H03M013/45

714780

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.

6940875, Sep 6, 2005

Aug 19, 2003

10/643792

David K. Mesecher - Huntington Station NY, US
Rui Yang - Greenlawn NY, US
Ramon Cerda - West Babylon NY, US

InterDigital Technology Corporation - Wilmington DE

H04J003/06

370516, 370252, 370342, 375136, 375294

A reciever for receiving a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a mixing signal and for combining the mixing signal with said information signal to produce a correction signal. An analyzer analyzes the phase of said correction signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller which recursively adjusts the phase of the correction signal such that the phase of said correction signal is substantially equal to said reference phase. The bandwidth controller then selects a bandwidth within an adjustable range based on the correction signal, estimates an offset by interrogating the error signal, and modifies said correction signal by the offset.

7032160, Apr 18, 2006

Aug 5, 2004

10/912671

Gregory S. Sternberg - Great Neck NY, US
Rui Yang - Greenlawn NY, US
Philip J. Pietraski - Huntington Station NY, US
Robert Lind Olesen - Huntington NY, US

InterDigital Technology Corporation - Wilmington DE

H03M 13/00

714780, 714774

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.

7042967, May 9, 2006

Jun 24, 2004

10/875900

Alexander Reznik - Titusville NJ, US
Rui Yang - Greenlawn NY, US
Bin Li - Ronkonkoma NY, US
Ariela Zeira - Huntington NY, US

InterDigital Technology Corporation - Wilmington DE

H03D 1/04
H03D 1/06
H03K 5/01
H03K 6/04
H04B 1/10

375346, 375353, 375231, 375238, 375239, 375256, 375257, 375285, 375286, 327310, 327384, 327551, 348607, 455296

The present invention has many aspects. One aspect of the invention is to perform equalization using a sliding window approach. A second aspect reuses information derived for each window for use by a subsequent window. A third aspect utilizes a discrete Fourier transform based approach for the equalization. A fourth aspect relates to handling oversampling of the received signals and channel responses. A fifth aspect relates to handling multiple reception antennas. A sixth embodiment relates to handling both oversampling and multiple reception antennas.

7130662, Oct 31, 2006

Dec 27, 2002

10/331073

Leonid Kazakevich - Plainview NY, US
Rui Yang - Greenlawn NY, US
Alexander Reznik - Princeton NJ, US

InterDigital Technology Corporation - Wilmington DE

H04B 1/38
H04M 1/00

4555621, 455 631, 455 632, 455561

A “smart antenna” method and system for use in cellular networks where the wireless transmit receive unit and/or the base station utilize multi-user detection (MUD). The interference to and from other users is taken into consideration to maximize the desired signal while eliminating or reducing interfering signals, thereby increasing overall system capacity.

7145894, Dec 5, 2006

Jul 6, 2005

11/175924

David K. Mesecher - Huntington Station NY, US
Rui Yang - Greenlawn NY, US
Ramón Cerda - West Babylon NY, US

InterDigital Technology Corporation - Wilmington DE

H04B 7/216

370342, 370514, 375376

A user equipment which receives a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a correction signal and for combining the correction signal with the information signal to produce a corrected information signal. An analyzer analyzes the phase of the corrected information signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller recursively adjusts the phase of the corrected information signal such that the phase of said corrected information signal is substantially equal to said reference phase. The bandwidth controller selects a bandwidth within an adjustable range based on the error signal, estimates an offset based on the error signal, and modifies the correction signal using the offset.

7197281, Mar 27, 2007

Jun 16, 2004

10/869672

Philip J. Pietraski - Huntington Station NY, US
Gregory S. Sternberg - Great Neck NY, US
Rui Yang - Greenlawn NY, US

InterDigital Technology Corporation - Wilmington DE

H04B 17/00
H04J 3/16

455 6711, 455 631, 370437

A method and system for generating a channel quality indication (CQI) for a communication channel established between a transmitter and a receiver. A signal-to-interference ratio (SIR) estimate of the communication channel is calculated and a correction term is generated based on a data packet transmitted by the transmitter. A corrected SIR is generated by combining the SIR estimate and the first correction term. The corrected SIR is mapped to a CQI value. The CQI value is sent to the transmitter in order to adjust the configuration of the next data packet transmitted by the transmitter. The first correction term may be generated by subtracting a target packet error rate (PER) from a filtered binary signal derived from negative-acknowledgement (NACK) signals and acknowledgement (ACK) signals which respectfully indicate whether or not errors exist in data packets transmitted by the transmitter.