公开(公告)号：KR20100096280A

公开(公告)日：2010-09-01

申请号：KR20107017412

申请日：2008-06-16

Applicant: QUALCOMM INC

Inventor： PARK JONG HYEON ,  CHANG TAE RYUN ,  KIM JE WOO

IPC: H04L27/26

CPC classification number: H04L27/2647 ,  H04L5/0046 ,  H04L25/022 ,  H04L2025/03414

Abstract: 복제된 신호를 포함하는 수신된 직교 주파수 분할 다중 접속(OFDMA) 신호를 프로세싱하기 위한 방법에 따라서, 상기 OFDMA 신호 내의 서브-캐리어들은 복제된 포맷으로 정렬될 수 있다. 상기 OFDMA 신호는 상기 서브-캐리어들이 상기 복제된 포맷으로 정렬된 후 상기 OFDMA 신호를 등화(equalizing) 및 결합(combining)될 수 있다. 상기 등화 및 결합은 최대 비 결합(maximum ratio combining, MRC) 방식에 따라 수행될 수 있다. 상기 OFDMA 신호는 상기 등화 및 결합이 수행된 후 디맵핑될 수 있다.

公开(公告)号：ES2547017T3

公开(公告)日：2015-09-30

申请号：ES08771223

申请日：2008-06-16

Applicant: QUALCOMM INC

Inventor： PARK JONG HYEON ,  CHANG TAE RYUN ,  KIM JE WOO

IPC: H04L27/26 ,  H04L25/03

Abstract: Un procedimiento para procesar una señal de acceso múltiple por división de frecuencia ortogonal, OFDMA, recibida que comprende unos pares de duplicación que están distribuidos a través de diferentes subportadoras, que comprende realizar un procesamiento de anticipación para disponer las subportadoras dentro de la señal de OFDMA en un formato duplicado que comprende un primer par de duplicación a1 y a2 y un segundo par de duplicación b1 y b2, en el que a1 y a2 comprenden las partes reales de una primera subportadora y una segunda subportadora y b1 y b2 comprenden las partes imaginarias de la primera subportadora y la segunda subportadora; ecualizar y combinar las subportadoras duplicadas de acuerdo con un esquema de combinación de relación máxima MRC ; y realizar un mapeo inverso de la señal de OFDMA, en el que el mapeo inverso se realiza después de que se realice la ecualización y la combinación.

公开(公告)号：CA2709908C

公开(公告)日：2015-03-17

申请号：CA2709908

申请日：2008-10-31

Applicant: QUALCOMM INC

Inventor： EDGE STEPHEN W ,  BLACK PETER JOHN ,  WU QIANG ,  ZHAO WANLUN ,  TOKGOZ YELIZ ,  PADOVANI ROBERTO ,  NAGUIB AYMAN FAWZY ,  KIM JE WOO ,  DAYAL PRANAV ,  AGASHE PARAG ARUN

IPC: H04W64/00

Abstract: Briefly, in accordance with one embodiment, a method of transmitting signals is provided. Signal waveforms are transmitted from at least two respective sectors. The at least two respective sectors are from at least two different sets of a superset of sectors. The transmitted signal waveforms include signal waveforms at least nearly mutually orthogonal at least along a particular signal dimension. An advantage of such an embodiment, for example, is reduced signal interference.

公开(公告)号：CA2706470C

公开(公告)日：2014-05-13

申请号：CA2706470

申请日：2008-01-31

Applicant: QUALCOMM INC

Inventor： PARK JONG HYEON ,  PARK JU WON ,  KIM JE WOO

IPC: H04L27/26

Abstract: In accordance with a method for identifying a preamble sequence and for estimating an integer carrier frequency offset, a signal that comprises a preamble sequence from a set of possible preamble sequences is received. A reduced set of integer carrier frequency offset (CFO) candidates may be determined. Cross-correlation operations may be performed with respect to the received signal and multiple candidate transmitted signals. Each candidate transmitted signal may include one of the set of possible preamble sequences. In addition, each candidate transmitted signal may correspond to one of the reduced set of integer CFO candi-dates. Multiple correlation values may be determined as a result of the cross-correlation operations. The correlation values may be used to identify the preamble sequence and to estimate the integer CFO.

公开(公告)号：CA2707499C

公开(公告)日：2014-02-18

申请号：CA2707499

申请日：2008-12-12

Applicant: QUALCOMM INC

Inventor： PARK JONG HYEON ,  KIM JE WOO ,  NANAVATI SAMEER ,  HURT JAMES Y

IPC: H04L1/18

Abstract: 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.

公开(公告)号：CA2727181A1

公开(公告)日：2010-01-21

申请号：CA2727181

申请日：2009-06-23

Applicant: QUALCOMM INC

Inventor： GLAZKO SERGUEI ,  BREHLER MATTHIAS ,  KIM JE WOO ,  MAKHIJANI MAHESH A

IPC: H04K1/10 ,  H04W72/00

Abstract: Methods and apparatus are provided for increasing throughput in a wireless communication system by reducing the amount of overhead transmitted to certain user terminals. Overhead due to control information may be reduced for these certain user terminals by selecting a low repetition factor. Overhead may be further reduced for these certain user terminals by selecting a modulation/coding scheme with a higher data rate for transmitting the control information. The selection may be based on channel conditions associated with the user terminals, such as signal-to-interference-plus-noise ratios (SINRs).

公开(公告)号：CA2727202A1

公开(公告)日：2009-12-30

申请号：CA2727202

申请日：2009-01-21

Applicant: QUALCOMM INC

Inventor： PARK JONG HYEON ,  BANISTER BRIAN CLARK ,  KANG INYUP ,  KIM JE WOO ,  HURT JAMES Y ,  BREHLER MATTHIAS

IPC: H04L1/06

Abstract: 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.

公开(公告)号：MX2009012459A

公开(公告)日：2009-12-02

申请号：MX2009012459

申请日：2008-05-15

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  BLACK PETER J ,  NAGUIB AYMAN FAWZY ,  ZHAO WANLUN ,  WU QIANG ,  TOKGOZ YELIZ ,  KIM JE WOO ,  AGASHE PARAG A ,  BUSHAN NAGA ,  DAYAL PRANAV

IPC: H04L5/02

Abstract: En resumen, de acuerdo con una modalidad, se proporciona un método para transmitir señales. Las formas de onda de señales se transmiten desde al menos dos sectores respectivos. Al menos dos sectores respectivos provienen de al menos dos conjuntos diferentes de un súperconjunto de sectores. Las formas de onda de señal transmitidas incluyen formas de onda de señal al menos prácticamente ortogonales mutuamente al menos a lo largo de una dimensión de señal particular. Una ventaja de tal modalidad, por ejemplo, es la interferencia de señal reducida.

公开(公告)号：CA2722869A1

公开(公告)日：2009-11-26

申请号：CA2722869

申请日：2009-05-12

Applicant: QUALCOMM INC

Inventor： KIM JE WOO ,  PARK JONG HYEON ,  CHANG TAE RYUN ,  PARK JU WON

IPC: H04B7/08 ,  H04B7/06

Abstract: Certain embodiments of the present disclosure provide a hybrid receiver diversity scheme that involves combining received signals in accordance with a combination of multiple receive diversity schemes. Certain embodiments of the present disclosure provide a hybrid transmit diversity scheme that involves transmitting diversity signals to a receiver according to a transmit diversity scheme selected based on signal quality measurements received from the receiver.

公开(公告)号：CA2707499A1

公开(公告)日：2009-06-18

申请号：CA2707499

申请日：2008-12-12

Applicant: QUALCOMM INC

Inventor： PARK JONG HYEON ,  KIM JE WOO ,  NANAVATI SAMEER ,  HURT JAMES Y

IPC: H04L1/18

Abstract: 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.