Wei Lu

8532027, Sep 10, 2013

Apr 20, 2010

12/763482

Wei Zha - Germantown MD, US
Amir Soltanian - Potomac MD, US
Yuelun Guo - Germantown MD, US
Wei Lu - Bethesda MD, US

PCTEL, Inc. - Bloomington IL

H04W 4/00

370328

A system and method for SSS detection under carrier frequency offset in an orthogonal frequency-division multiple access (OFDMA) downlink channel. A processor receives a signal sample that includes a transmission on a primary synchronization signal (PSS) and a transmission on a one secondary synchronization signal (SSS). The processor determines a correlation “P” of a first symbol transmitted in the PSS of the signal sample to a first known symbol at each time “t” of time increments k of the signal sample and a correlation “S” of a second symbol transmitted in the a SSS to a second known symbol at each time t-. 5/7 msecs. The processor receives a candidate phase rotation of θfrom a set of “i” candidates and determines a correlation “Cmax” over the time increments k representing a maximum amplitude of a combined correlation of S and P, with P rotated by θ. The processor determines the cell identifier from the first and second known symbols that produced S and P of C max and an estimation of the frequency offset between a transmitter of the signal sample and a receiver of the signal sample.

8588136, Nov 19, 2013

Apr 20, 2010

12/763482

Wei Zha - Germantown MD, US
Amir Soltanian - Potomac MD, US
Yuelun Guo - Germantown MD, US
Wei Lu - Bethesda MD, US

PCTEL, Inc. - Bloomingdale IL

H04W 4/00

370328

A system and method for SSS detection under carrier frequency offset in an orthogonal frequency-division multiple access (OFDMA) downlink channel. A processor receives a signal sample that includes a transmission on a primary synchronization signal (PSS) and a transmission on a one secondary synchronization signal (SSS). The processor determines a correlation “P” of a first symbol transmitted in the PSS of the signal sample to a first known symbol at each time “t” of time increments k of the signal sample and a correlation “S” of a second symbol transmitted in the a SSS to a second known symbol at each time t-. 5/7 msecs. The processor receives a candidate phase rotation of θfrom a set of “i” candidates and determines a correlation “Cmax” over the time increments k representing a maximum amplitude of a combined correlation of S and P, with P rotated by θ. The processor determines the cell identifier from the first and second known symbols that produced S and P of C max and an estimation of the frequency offset between a transmitter of the signal sample and a receiver of the signal sample.

20060209993, Sep 21, 2006

Feb 18, 2005

11/061807

Wei Lu - Germantown MD, US

H04L 27/14

375336000

An improved demodulation mechanism (and corresponding methods of operation) that demodulates a differentially-encoded GMSK signal in a manner that is accurate and efficient and with reduced complexity. The demodulation mechanism includes at least one buffer for storing sequences of in-phase and quadrature-phase baseband samples that carry the GMSK signal therein. A channel estimation block operates on the sequences of in-phase and quadrature-phase baseband samples to derive estimates for timing errors (preferably sample timing errors as well as carrier frequency and phase errors) in the samples. The channel estimation block uses the timing error estimates to transform the sequences of in-phase and quadrature-phase baseband samples to compensate for such timing errors. A de-rotation block operates on the transformed sequences to perform a de-rotation of π/2 per symbol in the GMSK signal. The result of the de-rotation is a sequence of complex values each having a real part and an imaginary part. An estimation block uses the result of the de-rotation to derive an estimate for the bits in the GMSK signal. Such estimation is generated by adding a first contribution to a second contribution, the first contribution derived from an imaginary part of a first complex value, and the second contribution derived from a real part of a second complex number. The first and second complex values are spaced apart by one symbol. Such mechanisms and methodologies are readily adaptable for the demodulation of other pre-coded partial response signals.

20070098023, May 3, 2007

Oct 28, 2005

11/262241

Wei Lu - Centereach NY, US
Zaza Sartania - Lake Grove NY, US
Lin Xu - Nesconset NY, US

Quantronix Corporation - East Setauket NY

H01S 3/30
H01S 3/098

372006000, 372018000

Fiber lasers include a fiber polarization controller to compensate for polarization variation In addition, fiber lasers include dual gain fibers to provide broader bandwidth for ultrashort pulse generation and amplification.

20070248194, Oct 25, 2007

Apr 19, 2006

11/406985

Wei Lu - Bethesda MD, US

H04L 27/06
H03D 1/00

375343000

A method and apparatus are provided for recognizing a predetermined sequence within a radio frequency signal received on a Doppler faded radio frequency channel. The method includes the steps of correlating a reference sequence with a sequence of elements of the radio frequency signal received on the Doppler faded radio frequency channel and detecting the predetermined sequence within the received signal when a cumulative power level of subsequences of the correlated sequence exceeds a predetermined power level threshold.

20080273688, Nov 6, 2008

May 5, 2007

11/800362

Wei Lu - Bethesda MD, US
Liping Chen - Bethesda MD, US

H04M 7/00

379339

The present invention PCM (phone computing machine) uses general purpose programmable device () as its core. Line-end interface (), includes RJ11 jack (), DAA () and CODEC (), connects to telephone line. User-end interface (), in one embodiment includes RJ11 jack (), SLIC () and CODEC () connects to user apparatus/networks/systems. The functionality of PCM is defined when a portable data storage device with application software is plugged in the machine's external memory interface (). PCM's great flexibility and low cost will open up new frontier in the telephone system. In addition, a general method similar as PCM can be applied to other cost-effective information processing applications between predetermined information sources. Examples are voice application in microphone system, audio/video processing in home entertain systems.

20210038685, Feb 11, 2021

Jul 21, 2020

16/934573

- Rockville MD, US
Jian Li - Rockville MD, US
Lixin Zheng - Rockville MD, US
Jae W. Lee - Philadelphia PA, US
Wei Lu - Rockville MD, US

A61K 38/17
A61P 25/28
C12N 15/62

Disclosed is a protein comprising no more than three human autoantigenic proteins, wherein a first human autoantigenic protein comprises a truncated myelin oligodendrocyte glycoprotein (MOG) amino acid sequence, a second human autoantigenic protein comprises a myelin basic protein (MBP) amino acid sequence, and a third human autoantigenic protein comprises a truncated proteolipid protein (PLP) amino acid sequence. Also disclosed are related nucleic acids, pharmaceutical compositions, methods of treating a demyelinating disease, and methods of producing the proteins.

20180105566, Apr 19, 2018

Mar 9, 2016

15/556738

- Rockville MD, US
Jian Li - Rockville MD, US
Lixin Zheng - Rockville MD, US
Jae W. Lee - Philadelphia PA, US
Wei Lu - Rockville MD, US

C07K 14/47
A61K 38/17
A61P 25/28
A61K 38/13

Disclosed is a protein comprising no more than three human autoantigenic proteins, wherein a first human autoantigenic protein comprises a truncated myelin oligodendrocyte glycoprotein (MOG) amino acid sequence, a second human autoantigenic protein comprises a myelin basic protein (MBP) amino acid sequence, and a third human autoantigenic protein comprises a truncated proteolipid protein (PLP) amino acid sequence. Also disclosed are related nucleic acids, pharmaceutical compositions, methods of treating a demyelinating disease, and methods of producing the proteins.