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    • 4. 发明申请
    • Determining Frequency Errors in a Multi-Carrier Receiver
    • 确定多载波接收机中的频率误差
    • US20150358192A1
    • 2015-12-10
    • US14110875
    • 2012-03-14
    • Thomas NilssonJianjun ChenAmit Singh
    • Thomas NilssonJianjun ChenAmit Singh
    • H04L27/26H04B1/10
    • H04L27/2657H04B1/1081H04L25/0222H04L27/0014H04L27/2672H04L27/2675H04L27/2695
    • Individual multipath components of digital data symbols sent from a transmitter on at least two carrier frequencies generated from a common clock signal, are received (401) with individual delays and processed by a receiver unit having at least two fingers. Successive channel estimates are determined (402) from received symbols for each finger and each carrier, and an estimated frequency error is determined (404) for each finger and each carrier. A linear equation system is constructed (405), in which each determined frequency error is expressed as a function of a first variable indicative of frequency drift and a second variable indicative of frequency error caused by Doppler effect. The equation system is solved (406) to provide a solution with estimates of the first and second variables for each finger, and an estimated frequency drift is determined (407) from the solution and utilized (408) as feedback signal for adjusting receiver clock frequency.
    • 在从公共时钟信号产生的至少两个载波频率上从发射机发送的数字数据符号的单个多径分量被接收(401)并具有单独的延迟,并由具有至少两个手指的接收机单元进行处理。 从每个手指和每个载体的接收符号确定连续信道估计(402),并且为每个手指和每个载波确定估计的频率误差(404)。 构造线性方程组(405),其中每个确定的频率误差被表示为指示频率漂移的第一变量的函数,以及指示由多普勒效应引起的频率误差的第二变量。 求解方程系统(406)以提供每个手指的第一和第二变量的估计的解,并且从解中确定估计的频率漂移(407),并将其用作用于调整接收机时钟频率的反馈信号(408) 。
    • 5. 发明授权
    • Frequency offset compensation for multi-carrier communication systems
    • 多载波通信系统的频偏补偿
    • US08861657B2
    • 2014-10-14
    • US13695885
    • 2011-05-06
    • Thomas NilssonAmit Singh
    • Thomas NilssonAmit Singh
    • H03D1/00H04L27/26
    • H04L27/2647H04L27/2657H04L27/2672H04L27/2675H04L27/2695
    • The present disclosure provides a frequency offset compensation technique for use by a multi-carrier receiver. Compared with legacy receiver designs, the technique introduces a new function which correlates various frequency offsets of the different carriers involved in multi-carrier signal transmission and reception. This new function can be coupled with an Automatic Frequency Control (AFC) function which can then utilize the correlation information provided by the new function to achieve significantly better frequency error/offset estimation when the carriers are correlated. As a method aspect, the frequency offset compensation technique comprises the steps of receiving signals modulated on a plurality of carrier frequencies, deriving a frequency offset for each carrier frequency to thereby provide a plurality of frequency offsets corresponding to the plurality of carrier frequencies; correlating these plurality of frequency offsets; and controlling compensation of the frequency offsets based on a result of the correlation.
    • 本公开提供了一种用于多载波接收机的频偏补偿技术。 与传统接收机设计相比,该技术引入了一种新功能,其将多载波信号传输和接收中涉及的不同载波的各种频率偏移相关联。 该新功能可以与自动频率控制(AFC)功能耦合,然后可以利用新功能提供的相关信息,在载波相关时实现明显更好的频率误差/偏移估计。 作为方法方面,频偏补偿技术包括以下步骤:接收在多个载波频率上调制的信号,导出每个载波频率的频率偏移,从而提供对应于多个载波频率的多个频率偏移; 将这些多个频率偏移相关联; 并根据相关性的结果控制频偏的补偿。
    • 8. 发明申请
    • VIRTUAL AGENT RESPONSE TO CUSTOMER INQUIRIES
    • 虚拟代理人对客户的查询
    • US20140006438A1
    • 2014-01-02
    • US13534866
    • 2012-06-27
    • Amit SinghAmar NageswaramMark Nicholas Studness
    • Amit SinghAmar NageswaramMark Nicholas Studness
    • G06F17/30
    • G06F17/30861G06F17/30864G06F17/3089
    • A system includes a resource database that stores resource information representing solutions to a plurality customer inquiries and a destination database that stores destination information identifying a plurality of online forums available via a communications network. Each online forum includes a thread having at least one user post. The system further includes a language processor in communication with the resource database and the destination database. The language processor associates the at least one user post with at least one of the plurality of customer inquiries and selects from the resource database at least one solution to the customer inquiry identified. The language processor further generates a new post in the online forum with content from the resource information responsive to the customer inquiry associated with the at least one user post.
    • 系统包括资源数据库,其存储表示多个客户查询的解决方案的资源信息,以及目的地数据库,其存储标识通过通信网络可用的多个在线论坛的目的地信息。 每个在线论坛包括一个具有至少一个用户帖子的线程。 该系统还包括与资源数据库和目的地数据库通信的语言处理器。 所述语言处理器将所述至少一个用户职位与所述多个客户查询中的至少一个相关联,并且从所述资源数据库中选择所识别的所述客户查询的至少一个解决方案。 所述语言处理器进一步在所述在线论坛中生成来自所述资源信息的内容的响应于与所述至少一个用户职位相关联的所述客户询问的新职位。
    • 10. 发明申请
    • Frequency Offset Compensation for Multi-carrier Communication Systems
    • 多载波通信系统频偏补偿
    • US20130202069A1
    • 2013-08-08
    • US13695885
    • 2011-05-06
    • Thomas NilssonAmit Singh
    • Thomas NilssonAmit Singh
    • H04L27/26
    • H04L27/2647H04L27/2657H04L27/2672H04L27/2675H04L27/2695
    • The present disclosure provides a frequency offset compensation technique for use by a multi-carrier receiver. Compared with legacy receiver designs, the technique introduces a new function which correlates various frequency offsets of the different carriers involved in multi-carrier signal transmission and reception. This new function can be coupled with an Automatic Frequency Control (AFC) function which can then utilize the correlation information provided by the new function to achieve significantly better frequency error/offset estimation when the carriers are correlated. As a method aspect, the frequency offset compensation technique comprises the steps of receiving signals modulated on a plurality of carrier frequencies, deriving a frequency offset for each carrier frequency to thereby provide a plurality of frequency offsets corresponding to the plurality of carrier frequencies; correlating these plurality of frequency offsets; and controlling compensation of the frequency offsets based on a result of the correlation.
    • 本公开提供了一种用于多载波接收机的频偏补偿技术。 与传统接收机设计相比,该技术引入了一种新功能,其将多载波信号传输和接收中涉及的不同载波的各种频率偏移相关联。 该新功能可以与自动频率控制(AFC)功能耦合,然后可以利用新功能提供的相关信息,在载波相关时实现明显更好的频率误差/偏移估计。 作为方法方面,频偏补偿技术包括以下步骤:接收在多个载波频率上调制的信号,导出每个载波频率的频率偏移,从而提供对应于多个载波频率的多个频率偏移; 将这些多个频率偏移相关联; 并根据相关性的结果控制频偏的补偿。