公开(公告)号：RU2444854C1

公开(公告)日：2012-03-10

申请号：RU2010136664

申请日：2009-01-30

Applicant: QUALCOMM INC

Inventor： RIMINI ROBERTO ,  MA TSZJUN

IPC: H04L27/26

Abstract: Изобретениеотноситсяк беспроводнойсвязии, вчастности, коценкеи отслеживаниючастотыи позволяетповыситьточновыполненияоценкиотклонениячастоты. Информацияо частотеполучаетсянаосновенаблюдениязаодиночнымсимволом, переносящимпилот-сигналы, которыйможетнаходитьсяв любомрасположениишириныполосы. Вчастности, информацияоботклонениичастотыполучаетсяпослевыборапилот-сигнала, назначенногоопределенномупользователю, преобразованиявыбранногопилот-сигналав пилот-сигналвременнойобласти, сопоставленияегос комплексно-сопряженнымпилот-сигналом, проецированиярезультатанаверхнююполовинуи нижнююполовинуединичнойокружностипутемумножениярезультатанаеj2π0.5n/N ие-j2π0.5n/N соответственнои вычисленияразностиквадратамодулярезультирующейвекторнойсуммыу каждойполовиныв качествеоценкиотклонениячастоты. Отклонениечастотыможеткорректироватьсянаосновеэтойоценки. Болеетого, раскрытыеаспектымогутприменятьсяк многолучевымсредам. 5 н. и 23 з.п. ф-лы, 14 ил.

公开(公告)号：CA2730653A1

公开(公告)日：2010-02-11

申请号：CA2730653

申请日：2009-08-03

Applicant: QUALCOMM INC

Inventor： RIMINI ROBERTO

IPC: H03G3/30

Abstract: Techniques for performing joint time-frequency automatic gain control (AGC) by a receiver are described. In an aspect, the receiver may transform time-domain samples with a fast Fourier transform (FFT) to obtain frequency-domain symbols and may detect for saturation of the frequency-domain symbols. The receiver may adjust a gain based on whether saturation is detected and may apply the gain prior to the FFT. In one design, the receiver may use a nominal value for a setpoint if saturation is not detected and may reduce the setpoint if saturation is detected. The receiver may adjust the gain based on the setpoint, which may determine the average power of the time-domain samples. In another design, the receiver may determine the gain based on a gain offset and may vary the gain offset based on whether saturation is detected. For both designs, the receiver may apply the gain on digital samples and/or an analog signal prior to the FFT.

公开(公告)号：CA2710873A1

公开(公告)日：2009-08-13

申请号：CA2710873

申请日：2009-01-30

Applicant: QUALCOMM INC

Inventor： RIMINI ROBERTO ,  MA JUN

IPC: H04L27/26

Abstract: Aspects relate to frequency estimation and tracking. Frequency information is extracted based on an observation of a single symbol carrying pilot tones, which can be at any bandwidth location. Specifically, the frequency error information is extracted after selecting pilot tone assigned to a specific user, transforming the selected pilot tone into time domain pilot signal, correlating it with a complex conjugate of the pilot signal, projecting the result to the upper half and lower half of the unit circle by multiplying the result with e j2p0.5n/N and e -j2p0.5n/N respectively and calculating the difference of the magnitude square of the resultant vector sum of each half as the frequency error estimation. The frequency error can be corrected based on the estimation. Further, the disclosed aspects can be applied to multi-path environments.

公开(公告)号：AU2009210457A1

公开(公告)日：2009-08-13

申请号：AU2009210457

申请日：2009-01-30

Applicant: QUALCOMM INC

Inventor： MA JUN ,  RIMINI ROBERTO

IPC: H04L27/26

Abstract: Aspects relate to frequency estimation and tracking. Frequency information is extracted based on an observation of a single symbol carrying pilot tones, which can be at any bandwidth location. Specifically, the frequency error information is extracted after selecting tones assigned to a specific user. The frequency error can be corrected based on the estimation. Further, the disclosed aspects can be applied to multi-path environments.

公开(公告)号：WO2007013942A2

公开(公告)日：2007-02-01

申请号：PCT/US2006028102

申请日：2006-07-19

Applicant: QUALCOMM INC ,  BLACK PETER JOHN ,  ATTAR RASHID AHMED AKBAR ,  REZAIIFAR RAMIN ,  AGASHE PARAG ARUN ,  FAN MINGXI ,  RIMINI ROBERTO ,  MA JUN

Inventor： BLACK PETER JOHN ,  ATTAR RASHID AHMED AKBAR ,  REZAIIFAR RAMIN ,  AGASHE PARAG ARUN ,  FAN MINGXI ,  RIMINI ROBERTO ,  MA JUN

CPC classification number: H04B7/264 ,  H04L1/16 ,  H04L5/023

Abstract: A method and system for providing asymmetric modes of operation in multi-carrier wireless communication systems. A method may assign a long code mask (LCM) to an information channel associated with a plurality of forward link carriers to transmit data from an access network to an access terminal; and multiplex the information channel on a reverse link carrier. The information channel may include one of data source channel (DSC), data rate control (DRC) and acknowledgment (ACK) information, and the multiplexing may be code division multiplexing (CDM). The A may instruct the AT on whether to multiplex the DSC information based on feedback from the AT. The method may further offset the ACK information on the reverse link to reduce the reverse link peak to average, CDM the information channel on an I-branch and on a Q-branch, and transmit the code division multiplexed information channel on the reverse link carrier.

Abstract translation: 一种用于在多载波无线通信系统中提供不对称操作模式的方法和系统。 一种方法可以将长代码掩码（LCM）分配给与多个前向链路载波相关联的信息信道以将数据从接入网络发送到接入终端; 并在反向链路载波上复用信息信道。 信息信道可以包括数据源信道（DSC），数据速率控制（DRC）和确认（ACK）信息之一，并且复用可以是码分复用（CDM）。 A可以根据来自AT的反馈指示AT是否复用DSC信息。 该方法可以进一步偏移反向链路上的ACK信息以将反向链路峰值降低到平均值，在I分支和Q分支上CDM信息信道，并且在反向链路载波上发送码分复用信息信道 。