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    • 2. 发明申请
    • FFT-BASED ESTIMATION OF THERMAL NOISE AND RISE OVER THERMAL IN A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中基于FFT的热噪声和热噪声估计
    • US20090207746A1
    • 2009-08-20
    • US12242569
    • 2008-09-30
    • Lu YuanDanlu ZhangMehraban IraninejadSharad Sambhwani
    • Lu YuanDanlu ZhangMehraban IraninejadSharad Sambhwani
    • H04L12/26
    • H04B17/382H04B17/345
    • Techniques for estimating thermal noise and rise-over-thermal (RoT) in a communication system are described. Thermal noise in a sideband may be measured and used as an estimate of thermal noise in a signal band. In one design, samples containing a desired signal centered at DC or a frequency higher than DC may be partitioned into blocks of K samples. Each block of K samples may be transformed with an FFT to obtain a corresponding block of K transform coefficients for K frequency bins. The power of transform coefficients for frequency bins in the sideband may be computed. Thermal noise may be estimated based on power values for the frequency bins in the sideband. Power values for frequency bins in the signal band may also be obtained and used to estimate total received power. RoT may then be estimated based on the estimated thermal noise and the estimated total received power.
    • 描述了用于估计通信系统中的热噪声和上升热(RoT)的技术。 可以测量边带中的热噪声并将其用作信号频带中的热噪声的估计。 在一种设计中,包含以DC或高于DC的频率为中心的期望信号的样本可被划分为K个样本的块。 可以用FFT对K个采样的每个块进行变换,以获得用于K个频率仓的K个变换系数的相应块。 可以计算边带中频率仓的变换系数的幂。 可以基于边带中的频率仓的功率值来估计热噪声。 也可以获得信号频带中的频率仓的功率值并用于估计总接收功率。 然后可以基于估计的热噪声和估计的总接收功率来估计RoT。
    • 3. 发明申请
    • Low I/O bandwidth method and system for implementing detection and identification of scrambling codes
    • 低I / O带宽方法和系统,用于实现扰码的检测和识别
    • US20070153883A1
    • 2007-07-05
    • US11724076
    • 2007-03-13
    • Sharad SambhwaniGhobad Heidari
    • Sharad SambhwaniGhobad Heidari
    • H04B1/00
    • H04B1/70735H04B1/70752H04B1/708H04B1/7083H04B1/7095
    • A system for detecting and identifying the identity of a base station or cell which transmits a scrambling code is provided. According to one aspect of the system, the system is used to perform scrambling code detection of eight (8) primary cells (each scrambling code's X-component being spaced sixteen (16) chips apart) in a group. According to another aspect of the system, a single scrambling code generator is used to generate a master scrambling code. The master scrambling code is then used to create individual scrambling codes which are used in correlation with received signals to detect in parallel which one of the eight (8) possible primary cells in the group transmitted the received signals. According to yet another aspect of the system, each of the correlators maintains a corresponding X-component segment of the master scrambling code. For every sixteen (16) chips, a new X-component segment of the master scrambling code is introduced into one of the correlators, a X-component segment of the master scrambling code is dropped from another correlator, and X-component segments of the master scrambling code are sequentially shifted or propagated through the remaining correlators; and concurrent correlations are performed by the correlators using their respective corresponding X-component segments of the master scrambling code and newly received signals.
    • 提供了一种用于检测和识别发送扰码的基站或小区的身份的系统。 根据该系统的一个方面,该系统用于对组(8个)主小区进行扰码检测(每个扰码的X分量间隔十六(16)个码片)。 根据系统的另一方面,使用单个扰码发生器来产生主扰码。 然后,主扰码用于产生与接收信号相关使用的各个扰码,并行检测组中八(8)个可能的主小区中的哪一个发送接收信号。 根据系统的另一方面,每个相关器维护主扰码的相应X分量段。 对于每十六(16)个芯片,主扰码的新X分量段被引入到一个相关器中,主扰码的X分量段从另一个相关器中丢弃,并且X分量段 主扰码依次移位或传播通过剩余的相关器; 并且相关器使用它们各自对应的主扰频码和新接收信号的X分量段来执行并发相关。
    • 4. 发明申请
    • Low I/O bandwidth method and system for implementing detection and identification of scrambling codes
    • 低I / O带宽方法和系统,用于实现扰码的检测和识别
    • US20070147613A1
    • 2007-06-28
    • US11706781
    • 2007-02-14
    • Sharad SambhwaniGhobad Heidari
    • Sharad SambhwaniGhobad Heidari
    • H04L9/28H04L9/00H04K1/00
    • H04B1/70752H04B1/70735H04B1/708H04B1/7083H04B1/7095
    • A system for detecting and identifying the identity of a base station or cell which transmits a scrambling code is provided. According to one aspect of the system, the system is used to perform scrambling code detection of eight (8) primary cells (each scrambling code being spaced sixteen (16) chips apart) in a group. According to another aspect of the system, a single scrambling code generator is used to generate a master scrambling code. The master scrambling code is then used to create individual scrambling codes which are used in correlation with received signals to detect in parallel which one of the eight (8) possible primary cells in the group transmitted the received signals. According to yet another aspect of the system, each of the correlators maintains a corresponding segment of the master scrambling code. For every sixteen (16) chips, a new segment of the master scrambling code is introduced into one of the correlators, a segment of the master scrambling code is dropped from another correlator, and segments of the master scrambling code are sequentially shifted or propagated through the remaining correlators; and concurrent correlations are performed by the correlators using their respective corresponding segments of the master scrambling code and newly received signals.
    • 提供了一种用于检测和识别发送扰码的基站或小区的身份的系统。 根据系统的一个方面,该系统用于执行八(8)个主小区(每个扰码分开间隔十六(16)个码片)的扰码检测)。 根据系统的另一方面,使用单个扰码发生器来产生主扰码。 然后,主扰码用于产生与接收信号相关使用的各个扰码,并行检测组中八(8)个可能的主小区中的哪一个发送接收信号。 根据系统的另一方面,每个相关器维护主扰码的相应段。 对于每十六(16)个芯片,主扰码的一个新的段被引入到一个相关器中,主扰码的一个段从另一个相关器中丢弃,主扰码的段被顺序地移位或传播通过 剩余的相关器; 并且相关器使用它们各自对应的主扰码和新接收的信号段执行并发相关。
    • 7. 发明申请
    • LOW I/O BANDWIDTH METHOD AND SYSTEM FOR IMPLEMENTING DETECTION AND IDENTIFICATION OF SCRAMBLING CODES
    • 低I / O带宽方法和系统,用于实现SCRAMBLING代码的检测和识别
    • US20090268789A1
    • 2009-10-29
    • US12499756
    • 2009-07-08
    • Sharad SambhwaniGhobad Heidari
    • Sharad SambhwaniGhobad Heidari
    • H04B1/707H04L27/06
    • H04B1/70735H04B1/70752H04B1/708H04B1/7083H04B1/7095
    • A system for detecting and identifying the identity of a base station or cell which transmits a scrambling code is provided. According to one aspect of the system, the system is used to perform scrambling code detection of eight (8) primary cells (each scrambling code's X-component being spaced sixteen (16) chips apart) in a group. According to another aspect of the system, a single scrambling code generator is used to generate a master scrambling code. The master scrambling code is then used to create individual scrambling codes which are used in correlation with received signals to detect in parallel which one of the eight (8) possible primary cells in the group transmitted the received signals. According to yet another aspect of the system, each of the correlators maintains a corresponding X-component segment of the master scrambling code. For every sixteen (16) chips, a new X-component segment of the master scrambling code is introduced into one of the correlators, a X-component segment of the master scrambling code is dropped from another correlator, and X-component segments of the master scrambling code are sequentially shifted or propagated through the remaining correlators; and concurrent correlations are performed by the correlators using their respective corresponding X-component segments of the master scrambling code and newly received signals.
    • 提供了一种用于检测和识别发送扰码的基站或小区的身份的系统。 根据该系统的一个方面,该系统用于对组(8个)主小区进行扰码检测(每个扰码的X分量间隔十六(16)个码片)。 根据系统的另一方面,使用单个扰码发生器来产生主扰码。 然后,主扰码用于产生与接收信号相关使用的各个扰码,并行检测组中八(8)个可能的主小区中的哪一个发送接收信号。 根据系统的另一方面,每个相关器维护主扰码的相应X分量段。 对于每十六(16)个芯片,主扰码的新X分量段被引入到一个相关器中,主扰码的X分量段从另一个相关器中丢弃,并且X分量段 主扰码依次移位或传播通过剩余的相关器; 并且相关器使用它们各自对应的主扰频码和新接收信号的X分量段来执行并发相关。
    • 9. 发明申请
    • Quasi-orthogonal allocation of codes in TD-CDMA systems
    • 在TD-CDMA系统中准正交分配码
    • US20070097855A1
    • 2007-05-03
    • US11365218
    • 2006-02-28
    • Sharad SambhwaniKee-Bong SongJuan Montojo
    • Sharad SambhwaniKee-Bong SongJuan Montojo
    • H04J11/00
    • H04J13/18H01Q3/26H04B1/7097H04B1/71055H04B1/71072H04B7/08H04J13/0048H04J13/0074
    • Systems and methodologies are described that facilitate increasing throughput in a time-division duplexed CDMA wireless communication environment. A set of orthogonal Walsh code sequences can be assigned to a first group of users in a network sector, and a duplicate set of orthogonal Walsh code sequences can be assigned to at least a second group of users in the sector. A number of receive antennas equal or greater than to the number of duplicate code sets being assigned can be deployed to linearly scale sector capacity to meet user demand. Additionally, user devices employing duplicate Walsh code sequence assignments at a base station serving the sector can be distinguished from each other, and timing offsets between such users can be enforced to mitigate any jamming effect at the base station receiver. Still furthermore, user device channel requirements in the sector can be continuously evaluated and an appropriate number of antennas can be dynamically deployed to provide scalable service to all such user devices.
    • 描述了在时分双工CDMA无线通信环境中促进增加吞吐量的系统和方法。 可以将一组正交沃尔什码序列分配给网络扇区中的第一组用户,并且可以向扇区中的至少第二组用户分配一组正交沃尔什码序列。 等于或大于分配的重复码集的数量的多个接收天线可以部署成线性地缩放扇区容量以满足用户需求。 此外,可以在服务于扇区的基站处采用重复的沃尔什码序列分配的用户设备彼此区分,并且可以实施这些用户之间的定时偏移以减轻基站接收机处的任何干扰效应。 此外,可以连续地评估扇区中的用户设备信道要求,并且可以动态地部署适当数量的天线,以向所有这样的用户设备提供可伸缩服务。
    • 10. 发明申请
    • Data flow control for adaptive integrated circuitry
    • 自适应集成电路的数据流控制
    • US20050039185A1
    • 2005-02-17
    • US10641976
    • 2003-08-14
    • Ghobad Heidari-BateniSharad Sambhwani
    • Ghobad Heidari-BateniSharad Sambhwani
    • G06F9/00G06F9/38G06F9/50
    • G06F9/3851G06F9/5016G06F15/7867
    • The present invention concerns data flow control in adaptive integrated circuitry which utilizes a data flow model for data processing. The present invention controls task initiation and execution based upon data consumption measured in data buffer units. In the various embodiments, when a first task of a plurality of tasks is initiated, buffer parameter is determined and a buffer count is initialized for the first task. For each iteration of the first task using a data buffer unit of input data, the buffer count is correspondingly adjusted, such as incremented or decremented. When the buffer count meets the buffer parameter requirements, the state of the first task is changed, which may including stopping the first task, and a next action is determined, such as initiating a second task. The various apparatus embodiments include a hardware task manager, a node sequencer, a programmable node, and use of a monitoring task within an adaptive execution unit.
    • 本发明涉及利用数据流模型进行数据处理的自适应集成电路中的数据流控制。 本发明基于在数据缓冲器单元中测量的数据消耗来控制任务启动和执行。 在各种实施例中,当启动多个任务的第一任务时,确定缓冲器参数并且为第一任务初始化缓冲器计数。 对于使用输入数据的数据缓冲器单元的第一任务的每次迭代,相应地调整缓冲器计数,例如递增或递减。 当缓冲器计数满足缓冲器参数要求时,第一任务的状态被改变,其可以包括停止第一个任务,并确定下一个动作,例如启动第二个任务。 各种设备实施例包括硬件任务管理器,节点定序器,可编程节点以及自适应执行单元内的监视任务的使用。