公开(公告)号：AU2003239206A1

公开(公告)日：2003-12-31

申请号：AU2003239206

申请日：2003-06-10

Applicant: QUALCOMM INC

Inventor： NAGPAL VIKAS ,  NEW WEN JING ,  RAO SUBRAMANYA P ,  SUBRAHMANYA PARVATHANATHAN ,  AMERGA MESSAY

IPC: H04B1/00 ,  H04B7/12 ,  H04L12/56 ,  H04L27/00 ,  H04W24/00 ,  H04W48/16 ,  H04W52/00 ,  H04B1/707 ,  H04Q7/38

Abstract: Techniques for reducing the time required for frequency scan in acquisition are disclosed. In one aspect, received power measurements are made at one or more of the possible carrier frequencies and system search is performed on one or more of those frequencies when the power measurement exceeds a threshold. In another aspect, the power is measured at one or more frequencies in a band of frequencies surrounding a frequency at which the measured power exceeded a threshold. If the measured power at one or more of the frequencies in the band exceeds a second threshold, a system search is performed at one or more of those frequencies. In yet another aspect, frequencies meeting certain criteria are sorted in order of measured power prior to system search or further power measurement, and subsequent processing is performed in order of descending measured power. Various other aspects are also presented. These aspects have the benefit of reducing acquisition time, which results in faster system access and allows for more efficient use of system resources.

公开(公告)号：CA2460957A1

公开(公告)日：2003-03-27

申请号：CA2460957

申请日：2002-09-19

Applicant: QUALCOMM INC

Inventor： TERASAWA DAISUKE ,  GHO GWANG-HYUN ,  AGRAWAL AVNEESH ,  RAO SUBRAMANYA P ,  VENKATESAN SIVARAMA

IPC: H04B1/7073 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7083 ,  H04B1/709 ,  H04B1/7093 ,  H04Q7/38 ,  H04B1/707 ,  H04B7/26

Abstract: Techniques for searching in asynchronous systems are disclosed. In one aspec t, a plurality of codes, such as SSCs, are correlated with a received signal at a plurality of offsets to produce a code/slot energy corresponding to each code/slot boundary pair. Unique subsets of the code/slot energies are summed to produce code sequence energies, the maximum of which indicates a located code sequence and slot boundary. In another aspect, the correlation is performed by sub-correlating the received signal with a common sequence, and performing a Fast Hadamard Transform (FHT) on the results. In yet another aspect, one sub-correlator can be used to search a plurality of peaks simultaneously. Various other aspects of the invention are also presented. These aspects collectively have the benefit of circuit area and search-time efficiency which translate into reduced costs, increased standby time, increased acquisition speed, higher quality signal transmission, increased data throughput, decreased power, and improved overall system capacity.

公开(公告)号：AU2009201978A1

公开(公告)日：2009-06-11

申请号：AU2009201978

申请日：2009-05-19

Applicant: QUALCOMM INC

Inventor： KASTURI NITIN ,  ZHANG YI ,  RAO SUBRAMANYA P ,  VAYANOS ALKINOOS HECTOR

IPC: H04B7/005 ,  H04L12/56 ,  H04W28/18 ,  H04W52/22 ,  H04W52/26 ,  H04W52/36 ,  H04W52/50 ,  H04W52/58

Abstract: Various embodiments are provided for determining a set of acceptable transport format combinations for transmission on a current time frame. A set of acceptable modified rate power adjustment values is determined based on a maximum power level, an accumulated power commands and an initial power control command. A set of acceptable channel gain factors is determined based on the set of acceptable modified rate power adjustments values, and the set of acceptable transport format combinations is determined based on the set of acceptable channel gain factors. A possible set of modified rate power adjustment values is associated to a set of channel gain factors for determining the set of accepted channel gain factors based on various design of a transmitter chain used for transmission of data from the mobile station.

公开(公告)号：CA2488571A1

公开(公告)日：2003-12-24

申请号：CA2488571

申请日：2003-06-10

Applicant: QUALCOMM INC

Inventor： NEW WEN JING ,  SUBRAHMANYA PARVATHANATHAN ,  RAO SUBRAMANYA P ,  NAGPAL VIKAS ,  AMERGA MESSAY

IPC: H04B1/00 ,  H04B7/12 ,  H04L12/56 ,  H04L27/00 ,  H04W24/00 ,  H04W48/16 ,  H04W52/00 ,  H04B1/707 ,  H04Q7/38

Abstract: Techniques for reducing the time required for frequency scan in acquisition are disclosed. In one aspect, received power measurements are made at one or more of the possible carrier frequencies and system search is performed on o ne or more of those frequencies when the power measurement exceeds a threshold. In another aspect, the power is measured at one or more frequencies in a ban d of frequencies surrounding a frequency at which the measured power exceeded a threshold. If the measured power at one or more of the frequencies in the ba nd exceeds a second threshold, a system search is performed at one or more of those frequencies. In yet another aspect, frequencies meeting certain criter ia are sorted in order of measured power prior to system search or further powe r measurement, and subsequent processing is performed in order of descending measured power. Various other aspects are also presented. These aspects have the benefit of reducing acquisition time, which results in faster system access and allows for more efficient use of system resources.

公开(公告)号：AU2002325056A1

公开(公告)日：2003-04-01

申请号：AU2002325056

申请日：2002-09-19

Applicant: QUALCOMM INC

Inventor： RAO SUBRAMANYA P ,  TERASAWA DAISUKE ,  VENKATESAN SIVARAMA ,  GHO GWANG-HYUN ,  AGRAWAL AVNEESH

IPC: H04B1/7073 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7083 ,  H04B1/709 ,  H04B1/7093 ,  H04Q7/38 ,  H04B1/707 ,  H04B7/26

Abstract: Techniques for searching in asynchronous systems are disclosed. In one aspect, a plurality of codes, such as SSCs, are correlated with a received signal at a plurality of offsets to produce a code/slot energy corresponding to each code/slot boundary pair. Unique subsets of the code/slot energies are summed to produce code sequence energies, the maximum of which indicates a located code sequence and slot boundary. In another aspect, the correlation is performed by sub-correlating the received signal with a common sequence, and performing a Fast Hadamard Transform (FHT) on the results. In yet another aspect, one sub-correlator can be used to search a plurality of peaks simultaneously. Various other aspects of the invention are also presented. These aspects collectively have the benefit of circuit area and search-time efficiency which translate into reduced costs, increased standby time, increased acquisition speed, higher quality signal transmission, increased data throughput, decreased power, and improved overall system capacity.

公开(公告)号：WO2010028351A2

公开(公告)日：2010-03-11

申请号：PCT/US2009056206

申请日：2009-09-08

Applicant: QUALCOMM INC ,  CUI TAO ,  LU FENG ,  SETHURAMAN VIGNESH ,  RAO SUBRAMANYA P ,  SUBRAHMANYA PARVATHANATHAN ,  GOTETI ANIL KUMAR

Inventor： CUI TAO ,  LU FENG ,  SETHURAMAN VIGNESH ,  RAO SUBRAMANYA P ,  SUBRAHMANYA PARVATHANATHAN ,  GOTETI ANIL KUMAR

IPC: H04W16/04

CPC classification number: H04L1/0026

Abstract: Various embodiments are disclosed which predict the channel quality indicator (CQI) in High Speed Downlink Packet Access (HSDPA). The accuracy of CQI is crucial for HSDPA performance. In some HSDPA systems the CQI may be as much as three (3) subframes stale. Accordingly, the prediction of CQI values is required in order to efficiently schedule data for transmission over the communication channel. Various embodiments disclose first order adaptive IIR filters which are significantly less complex than the finite impulse response (FIR) counterparts and achieve similar accuracy. By minimizing the mean squared error (MSE), an exact gradient descent algorithm may be used as well as two embodiment pseudolinear regression algorithms.

Abstract translation: 公开了预测高速下行链路分组接入（HSDPA）中的信道质量指示符（CQI）的各种实施例。 CQI的准确性对于HSDPA性能至关重要。 在一些HSDPA系统中，CQI可能多达三（3）个子帧陈旧。 因此，为了有效地调度用于在通信信道上传输的数据，需要预测CQI值。 各种实施例公开了一阶自适应IIR滤波器，其比有限脉冲响应（FIR）对应物复杂得多，并且实现类似的精度。 通过最小化均方误差（MSE），可以使用精确的梯度下降算法以及两个实施例的伪线性回归算法。

公开(公告)号：WO2010008830A2

公开(公告)日：2010-01-21

申请号：PCT/US2009048263

申请日：2009-06-23

Applicant: QUALCOMM INC ,  LU FENG ,  SRIPATHI PRASHANT UDUPA ,  ZHAO LIANG ,  SUBRAHMANYA PARVATHANATHAN ,  RAO SUBRAMANYA P

Inventor： LU FENG ,  SRIPATHI PRASHANT UDUPA ,  ZHAO LIANG ,  SUBRAHMANYA PARVATHANATHAN ,  RAO SUBRAMANYA P

IPC: H04B1/10

CPC classification number: H04W52/245 ,  H04B17/345 ,  H04L1/0026 ,  H04L1/20 ,  H04W52/241 ,  H04W52/243

Abstract: System(s) and method(s) are provided for generating phase-noise resilient channel quality indicator(s). A pilot signal utilized to determine a channel quality indicator is rotated to be aligned to a phase reference signal. Separate noise evaluations in quadrature and in-phase directions are utilized, at least in part, to generate a net noise estimate that is phase-noise compensated or resilient. For example, various combination schemes of quadrature and in-phase noise evaluations can be exploited to generate a net noise estimate, the schemes include weighted average of in-phase and quadrature noise estimates and running averages thereof. Simulation of net noise estimates as a function of geometry conditions reveal that the combination schemes provide substantive mitigation of phase-noise, thus making CQI generation phase-noise resilient.

Abstract translation: 提供了用于产生相位噪声弹性信道质量指示符的系统和方法。 用于确定信道质量指示符的导频信号被旋转以与相位参考信号对准。 至少部分地利用正交和同相方向上的独立噪声评估来产生相位噪声补偿或弹性的净噪声估计。 例如，可以利用正交和同相噪声评估的各种组合方案来产生净噪声估计，该方案包括同相和正交噪声估计的加权平均值及其运行平均值。 作为几何条件的函数的净噪声估计的模拟表明，组合方案提供了相位噪声的实质性减轻，从而使得CQI生成相位噪声具有弹性。

公开(公告)号：WO2010033704A3

公开(公告)日：2010-11-04

申请号：PCT/US2009057321

申请日：2009-09-17

Applicant: QUALCOMM INC ,  CUI TAO ,  LU FENG ,  GOTETI ANIL KUMAR ,  SETHURAMAN VIGNESH ,  RAO SUBRAMANYA P ,  SUBRAHMANYA PARVATHANATHAN

Inventor： CUI TAO ,  LU FENG ,  GOTETI ANIL KUMAR ,  SETHURAMAN VIGNESH ,  RAO SUBRAMANYA P ,  SUBRAHMANYA PARVATHANATHAN

IPC: H04L1/20 ,  H04L1/00

CPC classification number: H04W28/0236 ,  H04L1/0026 ,  H04L1/203 ,  H04W28/0205

Abstract: A method for optimizing throughput in a wireless communication system is disclosed. A target metric is estimated based on previous acknowledgment data. A channel quality indicator offset is determined based on the target metric. A channel quality indicator is adjusted based on the channel quality indicator offset. The channel quality indicator indicates the quality of a wireless transmission channel.

Abstract translation: 公开了一种用于优化无线通信系统中的吞吐量的方法。 目标度量基于先前的确认数据进行估计。 信道质量指标偏移量是基于目标度量确定的。 信道质量指标根据信道质量指标偏移进行调整。 信道质量指示符指示无线传输信道的质量。

公开(公告)号：WO03026147A3

公开(公告)日：2003-06-19

申请号：PCT/US0230001

申请日：2002-09-19

Applicant: QUALCOMM INC

Inventor： RAO SUBRAMANYA P ,  VENKATESAN SIVARAMA ,  GHO GWANG-HYUN ,  AGRAWAL AVNEESH ,  TERASAWA DAISUKE

IPC: H04B1/7073 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7083 ,  H04B1/709 ,  H04B1/7093 ,  H04Q7/38 ,  H04B1/707 ,  H04B7/26

CPC classification number: H04B1/7077 ,  H04B1/70735 ,  H04B1/70752 ,  H04B1/7083 ,  H04B1/709 ,  H04B1/7093 ,  H04B2201/70701 ,  H04B2201/70707

Abstract: Techniques for searching in asynchronous systems are disclosed. In one aspect, a plurality of codes, such as SSCs, are correlated with a received signal at a plurality of offsets to produce a code/slot energy corresponding to each code/slot boundary pair. Unique subsets of the code/slot energies are summed to produce code sequence energies, the maximum of which indicates a located code sequence and slot boundary. In another aspect, the correlation is performed by sub-correlating the received signal with a common sequence, and performing a Fast Hadamard Transform FHT on the results. In yet another aspect, one sub-correlator can be used to search a plurality of peaks simultaneously. Various other aspects of the invention are also presented. These aspects collectively have the benefit of circuit area and search-time efficiency which translate into reduced costs, increased standby time, increased acquisition speed, higher quality signal transmission, increased data throughput, decreased power, and improved overall system capacity.

Abstract translation: 公开了在异步系统中搜索的技术。 在一个方面，诸如SSC的多个代码与多个偏移处的接收信号相关，以产生对应于每个代码/时隙边界对的代码/时隙能量。 代码/时隙能量的独特子集被相加以产生代码序列能量，其最大值表示定位的代码序列和时隙边界。 在另一方面，通过将接收到的信号与公共序列进行子相关并且对结果执行快速Hadamard变换FHT来执行相关性。 在另一方面，可以使用一个子相关器同时搜索多个峰值。 还提出了本发明的各种其它方面。 这些方面共同具有电路面积和搜索时间效率的优点，其转化为降低的成本，增加的待机时间，增加的采集速度，更高质量的信号传输，增加的数据吞吐量，降低的功率以及改善的整体系统容量。