公开(公告)号：CA2518183C

公开(公告)日：2013-12-31

申请号：CA2518183

申请日：2004-03-08

Applicant: QUALCOMM INC

Inventor： MALLADI DURGA PRASAD

IPC: H04W24/00 ,  H04W24/08 ,  H04B7/26 ,  H04B17/00

Abstract: A method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication system. A first signal is received over a first channel and a second signal is received over a second channel, where the second signal is received at a higher signal power level than said first signal. A signal-to-noise ratio (SNR) of the second signal is measured, and the SNR of the first signal is determined based at least in part upon the measured SNR of the second signal.

公开(公告)号：CA2687517C

公开(公告)日：2013-12-03

申请号：CA2687517

申请日：2008-06-12

Applicant: QUALCOMM INC

Inventor： MALLADI DURGA PRASAD

IPC: H04L1/00

Abstract: Bits included in each code block of a transport block can be stored to an associated circular buffer and transmitted over a channel. Each circular buffer can vary in size in proportion to a size of the associated code block. Therefore, since in certain operating environments code blocks for a transport block can vary in size, circular buffers can vary in size as well. Accordingly, when not all data from a transport block and/or an array of circular buffers can be transmitted over the channel, each circular buffer from the array can transmit a portion of bits that is proportional to a size of the respective circular buffer (or the associated code block or encoded code block). Furthermore, the number of bits transmitted from each circular buffer can be constrained by an aggregate budget for all circular buffers and can be further constrained to be an integer multiple of a modulation order for the transport block.

公开(公告)号：BRPI0717962A2

公开(公告)日：2013-11-05

申请号：BRPI0717962

申请日：2007-11-01

Applicant: QUALCOMM INC

Inventor： XU HAO ,  MALLADI DURGA PRASAD

IPC: H04L27/26 ,  H04L1/00 ,  H04L5/02

Abstract: A communication system that facilitates transmissions in accordance with a single-carrier (SC) multiplexing scheme, a multi carrier (MC) multiplexing scheme or a combination thereof is disclosed. Based on various factors such as attributes associated with a UE (user equipment) or availability of resources, a base station can signal to the UE an appropriate multiplexing scheme to be adopted for particular transmissions. The UE can be scheduled for transmission in a semi-static mode wherein the UE employs the transmission scheme for a particular time interval or it may change the mode dynamically for different transmissions. For transmissions from the UE comprising a plurality of data streams with dissimilar attributes, the base station implements a MIMO (multiple input multiple output) system for the UE. This facilitates a UE to dynamically switch between or simultaneously adopt the various multiplexing schemes for communications and thereby fully utilize advantages associated with the different schemes.

公开(公告)号：BRPI0717953A2

公开(公告)日：2013-11-05

申请号：BRPI0717953

申请日：2007-11-06

Applicant: QUALCOMM INC

Inventor： MALLADI DURGA PRASAD ,  XU HAO

IPC: H04B7/005

Abstract: A method for a wireless communication includes receiving or storing a peak to average (PAR) back off value; and applying the PAR back off value to determine the transmission power and rate for SIMO and MIMO transmissions. In one aspect, the PAR back off value is at least partially based on modulation type. In another aspect, the PAR back off value is more for higher order QAM than for QPSK. The power allocation algorithm for different UL MIMO schemes is described as follows. For MIMO without antenna permutation (e.g. per antenna rate control), different PAR back off values are considered for different data streams. For MIMO with antenna permutation or other unitary transformation such as virtual antenna mapping or precoding, the PAR back off are determined based on combined channel. The transmission data rate depends on power and also the receiver algorithms such as a MMSE receiver or MMSE-SIC receiver.

公开(公告)号：CA2675690C

公开(公告)日：2013-10-22

申请号：CA2675690

申请日：2008-02-06

Applicant: QUALCOMM INC

Inventor： CHEN WANSHI ,  MALLADI DURGA PRASAD

IPC: H04L5/02 ,  H04B1/7143 ,  H04B7/12 ,  H04B7/26

Abstract: A method and apparatus for a wireless communication system, for frequency hopping using frequency fraction reuse scheme. The frequency hopping pattern is generated by dividing a portion of frequency into plurality of sub-bands, dividing a portion of time into plurality of sectors, each sector comprising the divided sub-bands, designating one of the divided sub-band within one of the sectors as the restricted sub-band, and allocating a location the designated sub-band as a restricted sub-band.

公开(公告)号：CA2667161C

公开(公告)日：2013-10-22

申请号：CA2667161

申请日：2007-11-06

Applicant: QUALCOMM INC

Inventor： MALLADI DURGA PRASAD ,  KIM BYOUNG-HOON ,  YOO TAESANG

IPC: H04B7/06 ,  H04B7/04 ,  H04L1/00 ,  H04L1/06

Abstract: Techniques for supporting MIMO transmission with layer permutation are described. In one aspect, multiple codewords may be generated for transmission from multiple antennas (e.g., virtual antennas), with the number of codewords being less than the number of antennas. Each codeword may be mapped across the multiple antennas. Two codewords may be generated. For rank 3, the first codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennas on each subcarrier). For rank 4, each codeword may be mapped to two layers. In another aspect, a base CQI indicative of an average signal quality may be determined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed with different penalty factors for different ranks or number of codewords.

公开(公告)号：UA103359C2

公开(公告)日：2013-10-10

申请号：UAA201109770

申请日：2007-10-03

Applicant: QUALCOMM INC

Inventor： DAMNJANOVIC ALEKSANDAR ,  MONTOJO JUAN ,  MALLADI DURGA PRASAD

IPC: H04W74/00 ,  H04Q11/00 ,  H04W52/16 ,  H04W52/28 ,  H04W52/32 ,  H04W52/50 ,  H04W74/08

Abstract: Описанытехнологиидляпередачисигнализациипроизвольногодоступак системе. Водномаспекте, сигнализацияпроизвольногодоступаможетссылатьсянаоснове, поменьшеймере, одногопараметрапередачи, имеетразличныезначениядляразличныхклассовпользовательскогооборудования (UE). Минимумоднозначениепараметраможетопределятьсянаосновеконкретногокласса UE, исигнализацияпроизвольногодоступаможетпосылатьсянаосновеопределенногозначения (значений) параметра. Сигнализацияпроизвольногодоступаможетбытьпреамбулойпроизвольногодоступа, и, поменьшеймере, одинпараметрпередачиможетвключатьв се

公开(公告)号：AU2009279485B2

公开(公告)日：2013-09-26

申请号：AU2009279485

申请日：2009-08-07

Applicant: QUALCOMM INC

Inventor： HOU JILEI ,  SMEE JOHN E ,  MALLADI DURGA PRASAD ,  HASSANPOUR GHADY NAVID ,  MALLIK SIDDHARTHA

IPC: H04B7/02 ,  H04B7/04

Abstract: Techniques for supporting distributed multiple-input multiple-output (MIMO) transmissions are described. In one design, a user equipment (UE) determines channel estimates for multiple cells and reports the channel estimates. The UE thereafter receives a data transmission sent by the multiple cells to the UE based on the channel estimates. The data transmission may include at least one data stream, and each data stream may be sent by one cell or the multiple cells to the UE. In another design, a UE determines first and second channel estimates for first and second cells, respectively, and reports the channel estimates. The UE then receives a first data transmission sent by the first cell to the UE based on the first channel estimate. The UE also receives a second data transmission sent by the second cell to another UE and steered away from the UE based on the second channel estimate.

公开(公告)号：ZA201208419B

公开(公告)日：2013-09-25

申请号：ZA201208419

申请日：2012-11-08

Applicant: QUALCOMM INC

Inventor： BARBIERI ALAN ,  XU HAO ,  MALLADI DURGA PRASAD ,  JI TINGFANG ,  LUO TAO

IPC: H04L20060101 ,  H04W20090101

公开(公告)号：BRPI0716159A2

公开(公告)日：2013-09-17

申请号：BRPI0716159

申请日：2007-09-04

Applicant: QUALCOMM INC

Inventor： MONTOJO JUAN ,  MALLADI DURGA PRASAD ,  WILLENEGGER SERGE

IPC: H04L27/26 ,  H04L1/06

Abstract: System (s) and method (s) are provided for transmitting data code Symbols and control code symbols spanning disparate transmission time intervals in the uplink. Data and control symbols that overlap in time-domain within a transmission time interval are- multiplexed and transmitted employing resources scheduled for data transmission (1030), whereas data and control code symbols that are not multiplexed are transmitted in respective allocated resources (1040). Multiplexing in conjunction with localized and distributed resource scheduling preserves the single-carrier characteristics of a single-carrier frequency division multiple access system.