Jong S Park
Massage Therapy at The Alameda, San Jose, CA

7995689, Aug 9, 2011

Jun 16, 2006

11/454726

Jong Hyeon Park - San Jose CA, US
Je Woo Kim - San Jose CA, US
Ju Won Park - San Ramon CA, US

Qualcomm Incorporated - San Diego CA

H04B 7/10, H04L 1/02

375347, 375349, 370206

An apparatus and a method can improve the performance of a smart antenna system for signal processing in the frequency domain. The method includes: performing Fast Fourier Transform (FFT) on a plurality of incoming signals received through antennas according to a predetermined FFT window; detecting a boundary of an OFDM symbol and setting the FFT window with a margin as large as a predetermined FFT window offset with reference to the detected symbol boundary; receiving the FFT window offset and generating an FFT window calibration signal; and multiplying the FFT-processed incoming signals by the FFT window calibration signal. The method can improve the reception performance of a base station by compensating for the multi-path channel by using an RX FEQ coefficient obtained by a receiver of a terminal as an FEQ weight of a transmitter of the terminal. Further, the method can generate a uniform non-directional beam by generating a variable omni-directional beam pattern in a smart antenna system.

2011020, Aug 25, 2011

Feb 23, 2010

12/711128

Michael L. McCloud - San Diego CA, US
Matthias Brehler - Boulder CO, US
Ju Won Park - San Ramon CA, US
Jong Hyeon Park - San Jose CA, US
Je Woo Kim - Cupertino CA, US
Inyup Kang - San Diego CA, US
Brian C. Banister - San Diego CA, US

QUALCOMM Incorporated - San Diego CA

H04L 1/02, H04L 27/06

375267, 375341

Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.

7974360, Jul 5, 2011

May 24, 2006

11/440829

Jong Hyeon Park - San Jose CA, US

Qualcomm Incorporated - San Diego CA

H04B 7/02, H04B 7/08, H04B 7/06, H04L 27/00

375267, 375299, 375347, 455137

An embodiment of the present invention is a technique to process signals in a communication system. In one embodiment, a plurality of signal processing units processes signals received from a plurality of antennae. The signal processor units are controlled by operational mode control signals. A channel estimator estimates channel responses using the processed signals according to an operational mode. An equalizer and combiner generates an equalized and combined signal using the received signals and the estimated channel responses. A Carrier to Interference Noise Ratio (CINR) estimator estimates CINR from the equalized and combined signal. The estimated CINR is used to generate the operational mode control signals. In another embodiment, a sub-carrier allocation controller generates sub-carrier allocation signals using an allocation base. A channel status information (CSI) and multiple input multiple output (MIMO) controller generates sub-carrier CSI signals and operational mode control signals using the sub-carrier allocation signals, estimated channel responses provided by a channel estimator, and an estimated CINR provided by an CINR estimator.

2009031, Dec 24, 2009

Sep 17, 2008

12/211935

Jong Hyeon Park - San Jose CA, US
Brian Clark Banister - San Diego CA, US
Inyup Kang - San Diego CA, US
Je Woo Kim - Cupertino CA, US
James Y. Hurt - San Diego CA, US
Matthias Brehler - Boulder CO, US

QUALCOMM Incorporated - San Diego CA

H04L 27/06

375341, 375340

Space time coding (STC) may be applied at the transmitter adding redundant information in both space and time dimensions. At the receiver, the received STC signal may be decoded using a spatial multiplexing MIMO decoding, for example, based on either Minimum Mean Square Error (MMSE) or maximum-likelihood (ML) algorithms. A selective STC decoder may incorporate both the conventional maximum ratio combining (MRC) decoding scheme and a MIMO decoding scheme. One of the STC decoding schemes may be selected, for example, based on estimated channel conditions in order to achieve a trade-off between error rate performance and computational complexity. Components used for a non-selected scheme may be powered down.

2011005, Mar 3, 2011

Sep 2, 2009

12/552673

Andrew Sendonaris - Campbell CA, US
Jia Tang - Campbell CA, US
Atul A. Salvekar - San Francisco CA, US
Shantanu Khare - Chicago IL, US
Jong Hyeon Park - San Jose CA, US
Brian C. Banister - San Diego CA, US
Tao Cui - Durham NC, US

QUALCOMM Incorporated - San Diego CA

H04L 5/12, H03M 13/45, G06F 11/10

375262, 714780, 714752, 714E11032

Certain aspects of the present disclosure relate to a method and an apparatus for unified iterative demodulation-decoding that can be employed in both multiple-input multiple-output (MIMO) and non-MIMO wireless systems.

8132069, Mar 6, 2012

Dec 13, 2007

11/956168

Jong Hyeon Park - San Jose CA, US
Je Woo Kim - Cupertino CA, US
Sameer Nanavati - Fremont CA, US
James Y. Hurt - San Diego CA, US

QUALCOMM Incorporated - San Diego CA

G08C 25/02, G08C 25/00

714748, 714749, 714751

A method and apparatus for combining retransmitted hybrid automatic repeat-request (HARQ) messages at different stages in an orthogonal frequency-division multiplexing (OFDM)/orthogonal frequency-division multiple access (OFDMA) receiver are provided. The type of HARQ combiner used for a particular channel may depend on a number of selection criteria including the modulation order of the transmission, the number of bits needed for the combined signals, and the headroom in the HARQ buffer. For some embodiments, a combination of different types of HARQ combiners may be designed into a receiver and selected on a per-channel basis. Proper selection of a HARQ combining scheme may reduce the required HARQ buffer size and may provide an increased combining gain when compared to conventional HARQ combining techniques.

8264946, Sep 11, 2012

Apr 17, 2009

12/425486

Madihally J. Narasimha - Saratogo CA, US
Je Woo Kim - Cupertino CA, US
Yuanning Yu - Santa Clara CA, US
Jong Hyeon Park - San Jose CA, US

Qualcomm Incorporated - San Diego CA

H04J 11/00

370208, 370210, 370366

Certain embodiments of the present disclosure relate to methods for peak-to-average power ratio (PAPR) reduction of a transmission signal in a single carrier frequency division multiple access (SC-FDMA) system. The proposed methods and systems are based on manipulations of an SC-FDMA transmission signal in a time- and/or a frequency-domain.

8548081, Oct 1, 2013

Feb 20, 2008

12/034420

Jong Hyeon Park - San Jose CA, US
Bok Tae Sim - San Ramon CA, US
Je Woo Kim - Cupertino CA, US

QUALCOMM Incorporated - San Diego CA

H04B 7/02

375267, 375260, 375262, 375347, 370203, 370208, 370210, 370252, 370328

In accordance with a method for diversity combining in an orthogonal frequency division multiple access (OFDMA) system, repetition diversity equalization and combining may be performed with respect to received OFDMA signals. In addition, receiver antenna diversity equalization and combining may be performed with respect to the received OFDMA signals. The repetition diversity equalization and combining and the receiver antenna diversity equalization and combining may be performed in accordance with a maximum ratio combining (MRC) scheme.

2011005, Mar 3, 2011

Sep 2, 2009

12/552647

Atul A. Salvekar - San Francisco CA, US
Jia Tang - Campbell CA, US
Jong Hyeon Park - San Jose CA, US
Shantanu Khare - Chicago IL, US

QUALCOMM Incorporated - San Diego CA

H04L 27/06, H04B 7/10

375341, 375347

Certain aspects of the present disclosure relate to a method and an apparatus for simplified serial interference cancellation in multiple-input multiple-output (MIMO) and non-MIMO wireless systems by using a single hardware element for multiple interference cancelled streams.

8161342, Apr 17, 2012

Dec 13, 2007

11/956278

Jong Hyeon Park - San Jose CA, US
Bok Tae Sim - San Ramon CA, US
Je Woo Kim - Cupertino CA, US
Serguei A. Glazko - San Diego CA, US
Sameer Nanavati - Fremont CA, US
Ju Won Park - San Jose CA, US

QUALCOMM Incorporated - San Diego CA

G08C 25/02, G08C 25/00

714748, 714749, 714751

A method and apparatus for combining retransmitted hybrid automatic repeat-request (HARQ) messages at different stages in an OFDM/OFDMA receiver are provided. A combination of different types of HARQ combiners may be designed into the receiver and selected on a per-channel basis. Proper selection of a HARQ combining scheme may reduce the required HARQ buffer size and may provide an increased combining gain when compared to conventional HARQ combining techniques. Furthermore, the HARQ combiner type may be dynamically selected through forward and reverse shifting between the different types of HARQ combining schemes in an effort to decrease the bit error ratio (BER) without saturating the HARQ buffer.