公开(公告)号：EP2002629A2

公开(公告)日：2008-12-17

申请号：EP07760136.7

申请日：2007-04-04

申请人： QUALCOMM Incorporated

发明人： SUBRAHMANYAM, Jai N. ,  GANAPATHY, Chinnappa K. ,  VAN VEEN, Durk L. ,  BAI, Jinxia ,  COUSINEAU, Kevin Stuart ,  OH, Seokyong

IPC分类号： H04L27/26

CPC分类号： H04L27/2626

摘要： Techniques for performing IFFT pipelining are described. In some aspects, the pipelining is achieved with a processing system having a memory having first and second sections, an encoder configured to process data in each of the first and second memory sections, an IFFT configured to process the encoded data in the first and second memory sections, and a post-processor configured to process the IFFT processed data in the first memory section while the IFFT is processing the encoded data in the second memory section, the post processor configured to operate at a different clock speed than the encoder or the IFFT.

公开(公告)号：EP1946505A2

公开(公告)日：2008-07-23

申请号：EP06846257.1

申请日：2006-11-08

申请人： QUALCOMM Incorporated

发明人： SUN, Thomas ,  VAN VEEN, Durk L. ,  LING, Fuyun ,  CHARI, Murali Ramaswamy

IPC分类号： H04L27/00 ,  H04L27/26

CPC分类号： H04L27/0012 ,  H04L25/0206 ,  H04L25/022 ,  H04L25/0232 ,  H04L27/2601 ,  H04L27/2647

摘要： Systems and methodologies are described that facilitate monitoring transmitter performance in a wireless communication environment. If the received modulation symbols are unknown during transmitter monitoring, it may be necessary to determine the modulation symbols for each subcarrier. The modulation types can be evaluated over a subset of subcarriers having a consistent modulation type, to reduce the possibility of an erroneous modulation type determination to an extremely low level. A metric can be generated for each modulation type that indicates the likelihood of a particular modulation type for the subset of subcarriers. The modulation type can be selected based upon the metric and modulation symbols consistent with the modulation type can be used for the subset of subcarriers.

摘要翻译： 描述了便于在无线通信环境中监测发射机性能的系统和方法。 如果在发射机监测期间接收到的调制符号是未知的，则可能有必要确定每个子载波的调制符号。 可以在具有一致调制类型的副载波的子集上评估调制类型，以将错误的调制类型确定的可能性降低到极低的水平。 可以为每个调制类型生成度量，其指示子载波子集的特定调制类型的可能性。 可以基于度量来选择调制类型，并且与调制类型一致的调制符号可以用于子载波子集。

公开(公告)号：EP2002630A2

公开(公告)日：2008-12-17

申请号：EP07760138.3

申请日：2007-04-04

申请人： QUALCOMM Incorporated

发明人： SUBRAHMANYAM, Jai N. ,  GANAPATHY, Chinnappa K. ,  VAN VEEN, Durk L. ,  BAI, Jinxia ,  COUSINEAU, Kevin Stuart ,  OH, Seokyong

IPC分类号： H04L27/26

CPC分类号： H04L27/2626

摘要： Techniques for performing IFFT pipelining are described. In some aspects, the pipelining is achieved with a processing system having a memory with a first, second and third sections, an encoder configured to process data in each of the first, second and third memory sections in a round robin fashion, an IFFT configured to process the encoded data in each of the first, second, and third sections in a round robin fashion, and a post-processor configured to process the IFFT processed data in each of the first, second and third memory sections in a round robin fashion.

摘要翻译： 描述了执行IFFT流水线的技术。 在一些方面中，流水线处理是利用具有带第一，第二和第三部分的存储器的处理系统来实现的，编码器被配置为以循环方式处理第一，第二和第三存储器部分中的每一个中的数据，配置IFFT 以循环方式处理第一，第二和第三部分中的每个部分中的编码数据;以及后处理器，被配置为以循环方式处理第一，第二和第三存储器部分中的每一个中的IFFT处理后的数据 。

公开(公告)号：EP2018725A2

公开(公告)日：2009-01-28

申请号：EP07762079.7

申请日：2007-05-10

申请人： Qualcomm Incorporated

发明人： LING, Fuyun ,  SUN, Thomas ,  KRISHNAMOORTHI, Raghuraman ,  VAN VEEN, Durk L. ,  CHARI, Murali Ramaswamy

IPC分类号： H04B17/00 ,  H04L27/00

CPC分类号： H04L27/38 ,  H04B17/101 ,  H04B17/18 ,  H04L1/20 ,  H04L25/022

摘要： The claimed subject matter relates to estimating noise variance associated with a transmitter. For example, the noise variance can be estimated in connection with determining performance parameters associated with a transmitter. Determining noise variance can include the acts of estimating phase alteration of a received signal through utilization of a least squares-based phase estimation algorithm. Determining noise variance can also include the act of determining an unbiased estimation of noise variance as a function of the estimated phase alteration.

公开(公告)号：EP2008420A1

公开(公告)日：2008-12-31

申请号：EP07760139.1

申请日：2007-04-04

申请人： QUALCOMM Incorporated

发明人： VAN VEEN, Durk L. ,  LING, Fuyun ,  KRISHNAMOORTHI, Raghuraman

IPC分类号： H04L27/26

CPC分类号： H04L27/2614 ,  H04L27/2615

摘要： Methods and apparatus for reduction of a peak to average ratio for an OFDM transmit signal. In an aspect, a method is provided for reducing a peak to average ratio of a transmit waveform. The method includes obtaining a primary scrambler sequence, generating a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining the primary and secondary scrambler sequences to produce a PAR reduction sequence. In another aspect, an apparatus is provided for reducing a peak to average ratio of a transmit waveform. The apparatus includes a secondary generator configured to generate a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining logic configured to combine a primary scrambler sequence and the secondary scrambler sequences to produce a PAR reduction sequence.