公开(公告)号：US09647646B2

公开(公告)日：2017-05-09

申请号：US14550682

申请日：2014-11-21

Applicant: QUALCOMM Incorporated

Inventor： Rajapaksa Senaratne ,  Koorosh Akhavan ,  Le Nguyen Luong ,  Eunmo Kang

IPC: H03L5/00 ,  H03K5/003 ,  H03G3/30

CPC classification number: H03K5/003 ,  H03G3/3078

Abstract: A method for setting an initial gain and an initial offset for an automatic gain and offset controller (AGOC) is described. The method includes determining a gain level at which a signal does not under-saturate or over-saturate an input to an analog-to-digital converter (ADC) by performing a binary search over a fixed set of gain levels while an offset is fixed. The method also includes determining an offset correction to bring an unmodulated carrier level at an output of the ADC to a target level. The method may also include updating the gain and the offset in response to changes in a signal level.

公开(公告)号：US20150303904A1

公开(公告)日：2015-10-22

申请号：US14550682

申请日：2014-11-21

Applicant: QUALCOMM Incorporated

Inventor： Rajapaksa Senaratne ,  Koorosh Akhavan ,  Le Nguyen Luong ,  Eunmo Kang

IPC: H03K5/003

CPC classification number: H03K5/003 ,  H03G3/3078

Abstract: A method for setting an initial gain and an initial offset for an automatic gain and offset controller (AGOC) is described. The method includes determining a gain level at which a signal does not under-saturate or over-saturate an input to an analog-to-digital converter (ADC) by performing a binary search over a fixed set of gain levels while an offset is fixed. The method also includes determining an offset correction to bring an unmodulated carrier level at an output of the ADC to a target level. The method may also include updating the gain and the offset in response to changes in a signal level.

Abstract translation: 描述了一种用于设置自动增益和偏移控制器（AGOC）的初始增益和初始偏移量的方法。 该方法包括通过在固定的增益电平集合上执行二进制搜索来确定信号未饱和或过饱和模拟数字转换器（ADC）的增益电平，同时偏移量固定 。 该方法还包括确定偏移校正以使ADC的输出处的未调制载波电平达到目标电平。 该方法还可以包括响应于信号电平的变化来更新增益和偏移。

公开(公告)号：US20150256324A1

公开(公告)日：2015-09-10

申请号：US14628798

申请日：2015-02-23

Applicant: QUALCOMM Incorporated

Inventor： Eunmo Kang ,  Le Nguyen Luong ,  Koorosh Akhavan ,  Rajapaksa Senaratne ,  Thomas Cargill

IPC: H04L7/00 ,  H04B5/00

CPC classification number: H04L7/0016 ,  H04B5/0031 ,  H04B5/0056 ,  H04B5/0075 ,  H04B5/02 ,  H04L7/033 ,  H04L7/04 ,  H04L25/49

Abstract: A method for inductively-coupled communications is described. The method includes receiving a signal. The method also includes analyzing the signal to estimate a symbol timing error. Estimating the symbol timing error may include comparing a location of a pause, a low-to-high or a high-to-low transition in the received signal with an ideal location of a pause or a transition. The method further includes adjusting symbol timing to correct for the symbol timing error.

Abstract translation: 描述了一种用于电感耦合通信的方法。 该方法包括接收信号。 该方法还包括分析信号以估计符号定时误差。 估计符号定时误差可以包括将接收到的信号中的暂停位置，从低到高或从高到低的转变与暂停或转换的理想位置进行比较。 该方法还包括调整符号定时以校正符号定时误差。

公开(公告)号：US20140321581A1

公开(公告)日：2014-10-30

申请号：US14039376

申请日：2013-09-27

Applicant: QUALCOMM Incorporated

Inventor： Le Nguyen Luong ,  Eunmo Kang

IPC: H04L1/20

CPC classification number: H04L1/206

Abstract: Systems and methods to detect the occurrence of erroneous demodulated bits for decision feedback demodulation are disclosed. In one implementation, an apparatus for detecting demodulation bit errors of a plurality of modulated bits includes a memory component configured to store a first threshold and a second threshold. The apparatus further includes a processor coupled to the memory component, the processor configured to retrieve the first threshold and second threshold from the memory component and to determine a demodulation metric value for each of the plurality of modulated bits, the processor further configured to count the number of demodulation metric values that cross the first threshold and compare the second threshold to the number of demodulation metric values that cross the first threshold.

Abstract translation: 公开了用于检测用于判决反馈解调的错误解调位的出现的系统和方法。 在一个实现中，用于检测多个调制比特的解调比特错误的装置包括被配置为存储第一阈值和第二阈值的存储器组件。 所述设备还包括耦合到存储器组件的处理器，所述处理器被配置为从存储器组件检索第一阈值和第二阈值，并且为多个调制位中的每一个确定解调度量值，所述处理器还被配置为对 与第一阈值相交的解调度量值的数量，并将第二阈值与跨越第一阈值的解调度量值的数量进行比较。

公开(公告)号：US20140080412A1

公开(公告)日：2014-03-20

申请号：US13791705

申请日：2013-03-08

Applicant: QUALCOMM INCORPORATED

Inventor： Eunmo Kang ,  James Y. Hurt

IPC: H04B5/00

CPC classification number: H04B5/00 ,  H04B5/0062 ,  H04B5/0075 ,  H04L25/066

Abstract: In a wireless communication system, an initiator, such as a card reader, can communicate with a target, such as a smart card or other device emulating a smart card, by amplitude modulating a radio frequency signal. In a receiver, levels of samples of a digital baseband signal of the amplitude modulated signal can vary. Apparatus and methods associate a received sample with a hard or sliced output state (such as +1, 0, or −1) and update a value associated with the hard output state for accurate slicing of the samples. This permits the use of hard symbols in further processing rather than soft samples, which can dramatically reduce the complexity of circuitry.

Abstract translation: 在无线通信系统中，诸如读卡器的发起者可以通过幅度调制射频信号来与诸如智能卡或模拟智能卡的其它设备的目标通信。 在接收机中，幅度调制信号的数字基带信号的采样电平可以变化。 装置和方法将接收到的样本与硬切片输出状态（例如+1,0或-1）相关联，并更新与硬输出状态相关联的值，以准确切片样本。 这允许在进一步处理中使用硬符号而不是软样本，这可以显着降低电路的复杂性。