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1. 发明申请

US20080062857A1 Method of OFDM communication using superposition coding 有权
标题翻译：使用叠加编码的OFDM通信方法
公开(公告)号：US20080062857A1
公开(公告)日：2008-03-13
申请号：US11516840
申请日：2006-09-07
申请人： Pantelis Monogioudis , Shirish Nagaraj , Sivarama Krishnan Venkatesan , Harish Viswanathan
发明人： Pantelis Monogioudis , Shirish Nagaraj , Sivarama Krishnan Venkatesan , Harish Viswanathan
IPC分类号： H04J11/00
CPC分类号： H04L27/2649 , H04L5/0007 , H04L27/2627
摘要： Improvements are provided in an OFDM network that uses superposition coding. A broadcast signal and e.g. a unicast signal are each subjected to OFDM modulation including processing by an IDFT, combined, and transmitted using non-orthogonal transmission resources. In one approach, the respective signals are combined after instead of before the IDFT processing. In specific examples, a respective cyclic prefix is appended to each signal after the IDFT processing but before the respective signals are combined. In another approach, a broadcast pilot signal and e.g. a unicast pilot signal are transmitted concurrently with the broadcast and unicast information signals. The pilot signals are transmitted using the same time and subcarrier resources, but are made more distinguishable by combining each with a respective scrambling or spreading code. In specific examples, embodiments, the unicast pilot signal is used for estimating the data rate for transmission of further unicast information signals.
摘要翻译：在使用叠加编码的OFDM网络中提供了改进。广播信号，例如。单播信号各自进行OFDM调制，包括通过IDFT的处理，组合并使用非正交传输资源发送。在一种方法中，相应的信号在IDFT处理之前被组合。在具体示例中，在IDFT处理之后但在组合各个信号之前，将各个循环前缀附加到每个信号。在另一种方法中，广播导频信号，例如，单播导频信号与广播和单播信息信号同时发送。导频信号使用相同的时间和子载波资源发送，但是通过将每一个与相应的加扰或扩展码相结合使得更加可区分。在具体示例的实施例中，单播导频信号用于估计用于传输另外的单播信息信号的数据速率。

2. 发明授权

US08189453B2 Method of OFDM communication using superposition coding 有权
标题翻译：使用叠加编码的OFDM通信方法
公开(公告)号：US08189453B2
公开(公告)日：2012-05-29
申请号：US12381022
申请日：2009-03-06
申请人： Pantelis Monogioudis , Shirish Nagaraj , Sivarama Krishnan Venkatesan , Harish Viswanathan
发明人： Pantelis Monogioudis , Shirish Nagaraj , Sivarama Krishnan Venkatesan , Harish Viswanathan
IPC分类号： H04J11/00
CPC分类号： H04L27/2649 , H04L5/0007 , H04L27/2627
摘要： Improvements are provided in an OFDM network that uses superposition coding. A broadcast signal and e.g. a unicast signal are each subjected to OFDM modulation including processing by an IDFT, combined, and transmitted using non-orthogonal transmission resources. In one approach, the respective signals are combined after instead of before the IDFT processing. In specific examples, a respective cyclic prefix is appended to each signal after the IDFT processing but before the respective signals are combined. In another approach, a broadcast pilot signal and e.g. a unicast pilot signal are transmitted concurrently with the broadcast and unicast information signals. The pilot signals are transmitted using the same time and subcarrier resources, but are made more distinguishable by combining each with a respective scrambling or spreading code. In specific examples, embodiments, the unicast pilot signal is used for estimating the data rate for transmission of further unicast information signals.
摘要翻译：在使用叠加编码的OFDM网络中提供了改进。广播信号，例如。单播信号各自进行OFDM调制，包括通过IDFT的处理，组合并使用非正交传输资源发送。在一种方法中，相应的信号在IDFT处理之前被组合。在具体示例中，在IDFT处理之后但在组合各个信号之前，将各个循环前缀附加到每个信号。在另一种方法中，广播导频信号，例如，单播导频信号与广播和单播信息信号同时发送。导频信号使用相同的时间和子载波资源发送，但是通过将每一个与相应的加扰或扩展码相结合使得更加可区分。在具体示例的实施例中，单播导频信号用于估计用于传输另外的单播信息信号的数据速率。

3. 发明申请

US20090175162A1 Method of OFDM communication using superposition coding 有权
标题翻译：使用叠加编码的OFDM通信方法
公开(公告)号：US20090175162A1
公开(公告)日：2009-07-09
申请号：US12381022
申请日：2009-03-06
申请人： Pantelis Monogioudis , Shirish Nagaraj , Sivarama Krishnan Venkatesan , Harish Viswanathan
发明人： Pantelis Monogioudis , Shirish Nagaraj , Sivarama Krishnan Venkatesan , Harish Viswanathan
IPC分类号： H04J11/00
CPC分类号： H04L27/2649 , H04L5/0007 , H04L27/2627
摘要： Improvements are provided in an OFDM network that uses superposition coding. A broadcast signal and e.g. a unicast signal are each subjected to OFDM modulation including processing by an IDFT, combined, and transmitted using non-orthogonal transmission resources. In one approach, the respective signals are combined after instead of before the IDFT processing. In specific examples, a respective cyclic prefix is appended to each signal after the IDFT processing but before the respective signals are combined. In another approach, a broadcast pilot signal and e.g. a unicast pilot signal are transmitted concurrently with the broadcast and unicast information signals. The pilot signals are transmitted using the same time and subcarrier resources, but are mad e more distinguishable by combining each with a respective scrambling or spreading code. In specific examples, embodiments, the unicast pilot signal is used for estimating the data rate for transmission of further unicast information signals.
摘要翻译：在使用叠加编码的OFDM网络中提供了改进。广播信号，例如。单播信号各自进行OFDM调制，包括通过IDFT的处理，组合并使用非正交传输资源发送。在一种方法中，相应的信号在IDFT处理之前被组合。在具体示例中，在IDFT处理之后但在组合各个信号之前，将各个循环前缀附加到每个信号。在另一种方法中，广播导频信号，例如，单播导频信号与广播和单播信息信号同时发送。导频信号使用相同的时间和子载波资源发送，但是通过将每一个与相应的加扰或扩展码组合，可以更加可辨别。在具体示例的实施例中，单播导频信号用于估计用于传输另外的单播信息信号的数据速率。

4. 发明授权

US07558191B2 Method of OFDM communication using superposition coding 有权
标题翻译：使用叠加编码的OFDM通信方法
公开(公告)号：US07558191B2
公开(公告)日：2009-07-07
申请号：US11516840
申请日：2006-09-07
申请人： Pantelis Monogioudis , Shirish Nagaraj , Sivarama Krishnan Venkatesan , Harish Viswanathan
发明人： Pantelis Monogioudis , Shirish Nagaraj , Sivarama Krishnan Venkatesan , Harish Viswanathan
IPC分类号： H04J11/00
CPC分类号： H04L27/2649 , H04L5/0007 , H04L27/2627
摘要： Improvements are provided in an OFDM network that uses superposition coding. A broadcast signal and e.g. a unicast signal are each subjected to OFDM modulation including processing by an IDFT, combined, and transmitted using non-orthogonal transmission resources. In one approach, the respective signals are combined after instead of before the IDFT processing. In specific examples, a respective cyclic prefix is appended to each signal after the IDFT processing but before the respective signals are combined. In another approach, a broadcast pilot signal and e.g. a unicast pilot signal are transmitted concurrently with the broadcast and unicast information signals. The pilot signals are transmitted using the same time and subcarrier resources, but are made more distinguishable by combining each with a respective scrambling or spreading code. In specific examples, embodiments, the unicast pilot signal is used for estimating the data rate for transmission of further unicast information signals.
摘要翻译：在使用叠加编码的OFDM网络中提供了改进。广播信号，例如。单播信号各自进行OFDM调制，包括通过IDFT的处理，组合并使用非正交传输资源发送。在一种方法中，相应的信号在IDFT处理之前被组合。在具体示例中，在IDFT处理之后但在组合各个信号之前，将各个循环前缀附加到每个信号。在另一种方法中，广播导频信号，例如，单播导频信号与广播和单播信息信号同时发送。导频信号使用相同的时间和子载波资源发送，但是通过将每一个与相应的加扰或扩展码相结合使得更加可区分。在具体示例的实施例中，单播导频信号用于估计用于传输另外的单播信息信号的数据速率。

5. 发明授权

US07756085B2 Steps one and three W-CDMA and multi-mode searching 有权
标题翻译：第一步和第三步W-CDMA和多模式搜索
公开(公告)号：US07756085B2
公开(公告)日：2010-07-13
申请号：US10160874
申请日：2002-05-31
申请人： Daisuke Terasawa , Deepu John , Hao Liu , Qiuzhen (Joe) Zou , Sivarama Krishnan Venkatesan
发明人： Daisuke Terasawa , Deepu John , Hao Liu , Qiuzhen (Joe) Zou , Sivarama Krishnan Venkatesan
IPC分类号： H04B7/216
CPC分类号： H04B1/70735 , H04B2201/70707 , H04B2201/7071
摘要： Techniques for efficient searching in asynchronous systems, such as W-CDMA, as well as multi-mode searching, are disclosed. In one aspect, step one and step three search are performed in a single search engine. In another aspect, a search engine is configurable to search the offsets of a slot in step one search, producing sequential hypothesis energies, and peak detecting and sorting those energies. In yet another aspect, the peak detector and sorter are configurable to perform step one searching or step three/multimode searching. Various other aspects of the invention are also presented. These aspects 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.
摘要翻译：公开了用于在诸如W-CDMA的异步系统中进行有效搜索的技术以及多模式搜索。在一个方面，在单个搜索引擎中执行步骤1和步骤3搜索。在另一方面，搜索引擎可配置为在步骤一搜索中搜索时隙的偏移量，产生顺序假设能量，以及峰值检测和排序这些能量。在另一方面，峰值检测器和分类器可配置为执行步骤一搜索或步骤三/多模式搜索。还提出了本发明的各种其它方面。这些方面具有电路面积和搜索时间效率的优点，从而降低了成本，增加了待机时间，提高了采集速度，提高了信号传输质量，提高了数据吞吐量，降低了功耗，提高了整体系统容量。

6. 发明授权

US07200631B2 Method and apparatus for determining an inverse square root of a given positive-definite hermitian matrix 有权
标题翻译：用于确定给定正定密度矩阵的反平方根的方法和装置
公开(公告)号：US07200631B2
公开(公告)日：2007-04-03
申请号：US10340575
申请日：2003-01-10
申请人： Laurence Eugene Mailaender , Jack Salz , Sivarama Krishnan Venkatesan
发明人： Laurence Eugene Mailaender , Jack Salz , Sivarama Krishnan Venkatesan
IPC分类号： G06F7/32 , G06F7/38
CPC分类号： G06F17/16 , H04L25/03299
摘要： Generally, a method and apparatus are provided for computing a matrix inverse square root of a given positive-definite Hermitian matrix, K. The disclosed technique for computing an inverse square root of a matrix may be implemented, for example, by the noise whitener of a MIMO receiver. Conventional noise whitening algorithms whiten a non-white vector, X, by applying a matrix, Q, to X, such that the resulting vector, Y, equal to Q·X, is a white vector. Thus, the noise whitening algorithms attempt to identify a matrix, Q, that when multiplied by the non-white vector, will convert the vector to a white vector. The disclosed iterative algorithm determines the matrix, Q, given the covariance matrix, K. The disclosed matrix inverse square root determination process initially establishes an initial matrix, Q0, by multiplying an identity matrix by a scalar value and then continues to iterate and compute another value of the matrix, Qn+1, until a convergence threshold is satisfied. The disclosed iterative algorithm only requires multiplication and addition operations and allows incremental updates when the covariance matrix, K, changes.
摘要翻译：通常，提供了一种用于计算给定正定Hermitian矩阵K的矩阵逆平方根的方法和装置。用于计算矩阵的逆平方根的所公开的技术可以例如由 MIMO接收机。常规的噪声增白算法通过向X施加矩阵Q来使非白矢量X变白，从而得到的等于Q.X的矢量Y为白色矢量。因此，噪声美白算法尝试识别矩阵Q，当乘以非白色矢量时，将将矢量转换为白色矢量。所公开的迭代算法在给定协方差矩阵K的情况下确定矩阵Q.所公开的矩阵逆平方根确定过程通过将单位矩阵乘以标量值来初始建立起始矩阵Q 0> 0 < 然后继续迭代并计算矩阵Q N + 1 + 1的另一个值，直到满足收敛阈值。所公开的迭代算法仅需要乘法和加法运算，并且当协方差矩阵K改变时允许增量更新。

7. 发明授权

US07167507B2 Equalizer and method for performing equalization in a wireless communications system 有权
标题翻译：用于在无线通信系统中执行均衡的均衡器和方法
公开(公告)号：US07167507B2
公开(公告)日：2007-01-23
申请号：US10185747
申请日：2002-07-01
申请人： Laurence Eugene Mailaender , Sivarama Krishnan Venkatesan , Graeme Kenneth Woodward
发明人： Laurence Eugene Mailaender , Sivarama Krishnan Venkatesan , Graeme Kenneth Woodward
IPC分类号： H04K1/00
CPC分类号： H04L1/0066 , H04B1/709 , H04B1/7097 , H04L1/0001 , H04L1/0071 , H04L1/0618 , H04L1/1812 , H04L25/03038 , H04L2025/03401 , H04L2025/0342 , H04L2025/03605 , H04L2025/03611
摘要： A receiver, system, and method for performing equalization. The receiver includes a multi-channel chip equalizer for receiving a plurality of receive baseband signals and restoring chip pulse shapes of a plurality of transmit baseband signals transmitted by a plurality of transmit antenna to produce a plurality of equalized output streams and a correlator for correlating the plurality of equalized output streams with a correlation signal to reduce gradient noise in the plurality of equalized output streams. The method of equalizing includes receiving a plurality of receive baseband signals and restoring chip pulse shapes of a plurality of transmit baseband signals transmitted by a plurality of transmit antenna to produce a plurality of equalized output streams and correlating the plurality of equalized output streams with a correlation signal to reduce gradient noise in the plurality of equalized output streams.
摘要翻译：用于执行均衡的接收机，系统和方法。接收机包括：多通道码片均衡器，用于接收多个接收基带信号，并且恢复多个发射天线发射的多个发射基带信号的码片脉冲形状，以产生多个均衡的输出流;以及相关器，多个具有相关信号的均衡输出流，以减少多个均衡输出流中的梯度噪声。均衡的方法包括接收多个接收基带信号并恢复由多个发射天线发送的多个发射基带信号的码片脉冲形状，以产生多个均衡的输出流，并将多个均衡的输出流与相关信号以减少多个均衡输出流中的梯度噪声。

8. 发明授权

US08331330B2 Steps one and three W-CDMA and multi-mode searching 失效
标题翻译：第一步和第三步W-CDMA和多模式搜索
公开(公告)号：US08331330B2
公开(公告)日：2012-12-11
申请号：US12763646
申请日：2010-04-20
申请人： Daisuke Terasawa , Deepu John , Hao Liu , Qiuzhen (Joe) Zou , Sivarama Krishnan Venkatesan
发明人： Daisuke Terasawa , Deepu John , Hao Liu , Qiuzhen (Joe) Zou , Sivarama Krishnan Venkatesan
IPC分类号： H04B7/216
CPC分类号： H04B1/70735 , H04B2201/70707 , H04B2201/7071
摘要： Techniques for efficient searching in asynchronous systems, such as W-CDMA, as well as multi-mode searching, are disclosed. In one aspect, step one and step three search are performed in a single search engine. In another aspect, a search engine is configurable to search the offsets of a slot in step one search, producing sequential hypothesis energies, and peak detecting and sorting those energies. In yet another aspect, the peak detector and sorter are configurable to perform step one searching or step three/multimode searching. Various other aspects of the invention are also presented. These aspects 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.
摘要翻译：公开了用于在诸如W-CDMA的异步系统中进行有效搜索的技术以及多模式搜索。在一个方面，在单个搜索引擎中执行步骤1和步骤3搜索。在另一方面，搜索引擎可配置为在步骤一搜索中搜索时隙的偏移量，产生顺序假设能量，以及峰值检测和排序这些能量。在另一方面，峰值检测器和分类器可配置为执行步骤一搜索或步骤三/多模式搜索。还提出了本发明的各种其它方面。这些方面具有电路面积和搜索时间效率的优点，从而降低了成本，增加了待机时间，提高了采集速度，提高了信号传输质量，提高了数据吞吐量，降低了功耗，提高了整体系统容量。

9. 发明申请

US20100202316A1 STEPS ONE AND THREE W-CDMA AND MULTI-MODE SEARCHING 失效
标题翻译：步骤一和三W-CDMA和多模式搜索
公开(公告)号：US20100202316A1
公开(公告)日：2010-08-12
申请号：US12763646
申请日：2010-04-20
申请人： Daisuke Terasawa , Deepu John , Hao Liu , Qiuzhen Zou , Sivarama Krishnan Venkatesan
发明人： Daisuke Terasawa , Deepu John , Hao Liu , Qiuzhen Zou , Sivarama Krishnan Venkatesan
IPC分类号： H04L12/26
CPC分类号： H04B1/70735 , H04B2201/70707 , H04B2201/7071
摘要： Techniques for efficient searching in asynchronous systems, such as W-CDMA, as well as multi-mode searching, are disclosed. In one aspect, step one and step three search are performed in a single search engine. In another aspect, a search engine is configurable to search the offsets of a slot in step one search, producing sequential hypothesis energies, and peak detecting and sorting those energies. In yet another aspect, the peak detector and sorter are configurable to perform step one searching or step three/multimode searching. Various other aspects of the invention are also presented. These aspects 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.
摘要翻译：公开了用于在诸如W-CDMA的异步系统中进行有效搜索的技术以及多模式搜索。在一个方面，在单个搜索引擎中执行步骤1和步骤3搜索。在另一方面，搜索引擎可配置为在步骤一搜索中搜索时隙的偏移量，产生顺序假设能量，以及峰值检测和排序这些能量。在另一方面，峰值检测器和分类器可配置为执行步骤一搜索或步骤三/多模式搜索。还提出了本发明的各种其它方面。这些方面具有电路面积和搜索时间效率的优点，从而降低了成本，增加了待机时间，提高了采集速度，提高了信号传输质量，提高了数据吞吐量，降低了功耗，提高了整体系统容量。

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