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    Method and apparatus for interleaving for information transmission or storage applications
    1.
    发明授权
    Method and apparatus for interleaving for information transmission or storage applications 有权
    用于信息传输或存储应用的交织的方法和装置

    公开(公告)号：US06687870B1

    公开(公告)日：2004-02-03

    申请号：US09406173

    申请日：1999-09-23

    申请人： Jafar Mohseni ,  Brian Butler ,  Deepu John ,  Haitao Zhang

    发明人： Jafar Mohseni ,  Brian Butler ,  Deepu John ,  Haitao Zhang

    IPC分类号： H03M1300

    CPC分类号： H03M13/2792 ,  H03M13/2707 ,  H03M13/276 ,  H03M13/2782

    摘要： Interleavers are used in data transmission and storage applications to introduce diversity into a data stream, thereby making adjacent symbols more independent with respect to a transfer environment of variable quality. Conventional interleavers require storage in whole units of data blocks. This storage requirement complicates implementations for applications where available circuit area is limited and data rates and block sizes are large. A novel interleaver produces an interleaved data block using storage space that is only a fraction of the size of the input data block.

    摘要翻译： 交织器用于数据传输和存储应用中以将分集引入到数据流中，从而使相邻符号相对于可变质量的传送环境更独立。 传统的交织器需要在整个数据块中存储。 这种存储要求使可用电路面积有限并且数据速率和块大小较大的应用的实现复杂化。 一种新颖的交织器使用只是输入数据块大小的一小部分的存储空间产生交错数据块。

    Digital filter with state storage
    6.
    发明授权
    Digital filter with state storage 有权
    带状态存储的数字滤波器

    公开(公告)号：US06820103B2

    公开(公告)日：2004-11-16

    申请号：US10003913

    申请日：2001-10-31

    申请人： Brian K. Butler ,  Deepu John ,  Haitao Zhang ,  Mohammad J. Mohseni

    发明人： Brian K. Butler ,  Deepu John ,  Haitao Zhang ,  Mohammad J. Mohseni

    IPC分类号： G06F1710

    CPC分类号： H03H17/0657 ,  H03H17/0226 ,  H03H17/0238 ,  H03H17/06 ,  H03H17/0607

    摘要： A system for digital filtering includes a set of logic gates, a state storage, and a multiplexer. The state storage includes two or more storage banks and may also include combinatorial logic and/or at least one lookup table. In one application, a filtering operation according to a finite-impulse-response filter coefficient vector is performed without runtime multiplications. Applications to symmetric and antisymmetric filter coefficient vectors are described, as well as applications to filter coefficient vectors of arbitrary odd or even length.

    摘要翻译： 用于数字滤波的系统包括一组逻辑门，状态存储器和多路复用器。 状态存储器包括两个或多个存储体，并且还可以包括组合逻辑和/或至少一个查找表。 在一个应用中，根据有限脉冲响应滤波器系数向量进行滤波操作，而不进行运行时乘法。 对对称和反对称滤波器系数向量的应用进行了描述，以及用于滤除任意奇数或偶数长度的系数向量的应用。

    Method and apparatus for buffering data transmission between producer and consumer
    7.
    发明授权
    Method and apparatus for buffering data transmission between producer and consumer 有权
    用于缓冲生产者和消费者之间的数据传输的方法和装置

    公开(公告)号：US06516360B1

    公开(公告)日：2003-02-04

    申请号：US09406172

    申请日：1999-09-23

    申请人： Jafar Mohseni ,  Brian Butler ,  Deepu John

    发明人： Jafar Mohseni ,  Brian Butler ,  Deepu John

    IPC分类号： G06F1300

    CPC分类号： G06F13/387

    摘要： A need to store data between a producing stage and a consuming stage commonly arises in digital processing applications. However, factors such as fabrication process limitations and circuit area constraints may restrict the amount of available storage. A novel method and apparatus for data buffering are disclosed which use less data storage than would be required by double buffering techniques.

    摘要翻译： 在数字处理应用中通常出现在生产阶段和消耗阶段之间存储数据的需要。 然而，制造工艺限制和电路面积限制等因素可能会限制可用存储量。 公开了一种用于数据缓冲的新型方法和装置，其使用比双缓冲技术所要求的更少的数据存储。

    Steps one and three W-CDMA and multi-mode searching
    8.
    发明授权
    Steps one and three W-CDMA and multi-mode searching 失效
    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。

    STEPS ONE AND THREE W-CDMA AND MULTI-MODE SEARCHING
    9.
    发明申请
    STEPS ONE AND THREE W-CDMA AND MULTI-MODE SEARCHING 失效
    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。

    Method and apparatus for rotating the phase of a complex signal
    10.
    发明授权
    Method and apparatus for rotating the phase of a complex signal 有权
    用于旋转复信号的相位的方法和装置

    公开(公告)号：US06535562B1

    公开(公告)日：2003-03-18

    申请号：US09452045

    申请日：1999-11-30

    申请人： Mohammad Jafar Mohseni ,  Brian Butler ,  Deepu John ,  Haitao Zhang

    发明人： Mohammad Jafar Mohseni ,  Brian Butler ,  Deepu John ,  Haitao Zhang

    IPC分类号： H04L2736

    CPC分类号： H04L27/206 ,  H04L27/2082

    摘要： In applications employing phase-shift keying modulation, a phase rotator as disclosed herein is used to rotate the constellation of signal vectors before carrier modulation in order to maximize modulator output power. Such a rotator may be applied in the digital domain (to complex signals having either binary-valued or multi-valued components) or in the analog domain.

    摘要翻译： 在采用相移键控调制的应用中，如本文所公开的相位旋转器用于在载波调制之前旋转信号矢量的星座，以便最大化调制器输出功率。 这种旋转器可以应用于数字域（具有二进制值或多值分量的复信号）或模拟域中。