LOGARITHMIC LOOKUP TABLES
    1.
    发明申请
    LOGARITHMIC LOOKUP TABLES 审中-公开
    对数查找表

    公开(公告)号:WO03009128A3

    公开(公告)日:2003-09-25

    申请号:PCT/US0222820

    申请日:2002-07-16

    Applicant: QUALCOMM INC

    CPC classification number: G06F7/5235 G06F1/0356 G06F2101/10

    Abstract: In one embodiment, the invention is directed toward techniques for generating results in a logarithmic domain. The techniques may exploit properties of a logarithmic function to reduce the memoryrequirements needed to implement lookup tables. For example, the techniques may utilize non-uniform sampling over a logarithmic orlogarithmic-like function to reduce the number of entries needed for a given lookup table. In particular, the techniques may involve separating a number into an exponent component and a mantissa component. Each of these different components can then be converted from a first domain to a second domain using different lookup tables.

    Abstract translation: 在一个实施例中,本发明针对用于在对数域中产生结果的技术。 这些技术可能会利用对数函数的属性来减少实现查找表所需的内存需求。 例如,这些技术可以利用对数或类对数函数上的非均匀采样来减少给定查找表所需的条目的数量。 具体地说,这些技术可能涉及将数字分成指数分量和尾数分量。 然后可以使用不同的查找表将这些不同组件中的每个组件从第一个域转换到第二个域。

    TECHNIQUES FOR CONTROLLING OPERATION OF CONTROL LOOPS IN A RECEIVER
    2.
    发明申请
    TECHNIQUES FOR CONTROLLING OPERATION OF CONTROL LOOPS IN A RECEIVER 审中-公开
    用于控制接收器中控制杆操作的技术

    公开(公告)号:WO2007134201A3

    公开(公告)日:2008-01-10

    申请号:PCT/US2007068724

    申请日:2007-05-11

    CPC classification number: H04B1/109

    Abstract: Techniques for controlling operation of control loops in a receiver are described. The operation of at least one control loop is modified in conjunction with a change in operating state, which may correspond to a change in linearity state, gain state, operating frequency, antenna configuration, etc. A change in linearity state may occur when jammers are detected and may cause bias current of analog circuit blocks to be adjusted. The at least one control loop to be modified may include a DC loop, an AGC loop, etc. The operation of a control loop may be modified by disabling the control loop or changing its time constant prior to changing operating state, waiting a predetermined amount of time to allow the receiver to settle, and enabling the control loop or restoring its time constant after waiting the predetermined amount of time.

    Abstract translation: 描述了用于控制接收机中的控制环路的操作的技术。 结合操作状态的改变来修改至少一个控制回路的操作,其可以对应于线性状态,增益状态,操作频率,天线配置等的改变。线性状态的变化可能发生在干扰器 并且可能导致模拟电路块的偏置电流被调整。 要修改的至少一个控制环路可以包括DC环路,AGC环路等。可以通过在改变操作状态之前禁用控制环路或改变其时间常数来修改控制环路的操作,等待预定量 的时间以允许接收机安定,并且在等待预定时间量之后启用控制环路或恢复其时间常数。

    AN AMPS RECEIVER SYSTEM USING A ZERO-IF ARCHITECTURE
    3.
    发明申请
    AN AMPS RECEIVER SYSTEM USING A ZERO-IF ARCHITECTURE 审中-公开
    使用零中立架构的AMPS接收机系统

    公开(公告)号:WO2004049580A2

    公开(公告)日:2004-06-10

    申请号:PCT/US0302221

    申请日:2003-01-24

    Applicant: QUALCOMM INC

    CPC classification number: H04B1/406 H03G3/3068 H04B1/0003 H04B1/30

    Abstract: An AMPS receiver system utilizing a ZIF architecture and processing received forward link signals in the digital domain. The AMPS receiver system includes an antenna (105), a direct converter (110), high dynamic A/D converters (120, 130), low pass filters (140, 150), a phase shifter (160), a digital FM demodulator (180), an accumulator (185) and a controller (190). The direct converter (110) further includes a low noise amplifier (112), a splitter (113), mixers (114, 116) and low pass filters (118, 119). The controller (190) adjusts the gains of the low noise amplifier (112) and the digital VGA (170) based on the average power of the signal outputted by the digital VGA (170).

    Abstract translation: 采用ZIF架构并在数字领域处理接收到的前向链路信号的AMPS接收机系统。 AMPS接收机系统包括天线(105),直接转换器(110),高动态A / D转换器(120,130),低通滤波器(140,150),移相器(160),数字FM解调器 (180),蓄能器(185)和控制器(190)。 直接转换器(110)还包括低噪声放大器(112),分离器(113),混频器(114,116)和低通滤波器(118,119)。 控制器(190)基于由数字VGA(170)输出的信号的平均功率来调节低噪声放大器(112)和数字VGA(170)的增益。

Patent Agency Ranking