公开(公告)号：US09130603B2

公开(公告)日：2015-09-08

申请号：US14020702

申请日：2013-09-06

Applicant: QUALCOMM Incorporated

Inventor： RaviKiran Gopalan ,  James Y. Hurt ,  Faramarz Sabouri ,  Thinh Nguyen

IPC: H04B5/00

CPC classification number: H04B5/0043 ,  H04B5/0031 ,  H04B5/0037 ,  H04B5/0075 ,  H04B5/0093

Abstract: Systems, methods, and devices for wireless communication are included herein. An aspect of the subject matter described in the disclosure provides a device configured to detect a transmission. The device includes a receiver configured to receive an inductive communication signal having a center frequency. The device further includes an analog-to-digital converter configured to sample the signal at a rate higher than twice the center frequency. The device further includes one or more processors configured to digitally downconvert the signal. The processors are further configured to compare an energy of the downconverted signal to a detection threshold. The device further includes a transmitter configured to selectively transmit a communication based on the comparison.

Abstract translation: 本文包括用于无线通信的系统，方法和设备。 在本公开中描述的主题的一个方面提供了被配置为检测传输的设备。 该设备包括接收器，其被配置为接收具有中心频率的感应通信信号。 该装置还包括配置成以高于中心频率两倍的速率对信号进行采样的模拟 - 数字转换器。 该设备还包括被配置为数字地下变频信号的一个或多个处理器。 处理器还被配置为将下变频信号的能量与检测阈值进行比较。 该设备还包括被配置为基于该比较选择性地发送通信的发射机。

公开(公告)号：US08903313B2

公开(公告)日：2014-12-02

申请号：US13791705

申请日：2013-03-08

Applicant: QUALCOMM Incorporated

Inventor： Eunmo Kang ,  James Y. Hurt

IPC: H04B5/00 ,  H04L25/06

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。

公开(公告)号：US20140080414A1

公开(公告)日：2014-03-20

申请号：US14020702

申请日：2013-09-06

Applicant: QUALCOMM Incorporated

Inventor： RaviKiran Gopalan ,  James Y. Hurt ,  Faramarz Sabouri ,  Thinh Nguyen

IPC: H04B5/00

CPC classification number: H04B5/0043 ,  H04B5/0031 ,  H04B5/0037 ,  H04B5/0075 ,  H04B5/0093

Abstract: Systems, methods, and devices for wireless communication are included herein. An aspect of the subject matter described in the disclosure provides a device configured to detect a transmission. The device includes a receiver configured to receive an inductive communication signal having a center frequency. The device further includes an analog-to-digital converter configured to sample the signal at a rate higher than twice the center frequency. The device further includes one or more processors configured to digitally downconvert the signal. The processors are further configured to compare an energy of the downconverted signal to a detection threshold. The device further includes a transmitter configured to selectively transmit a communication based on the comparison.

Abstract translation: 本文包括用于无线通信的系统，方法和设备。 在本公开中描述的主题的一个方面提供了被配置为检测传输的设备。 该设备包括接收器，其被配置为接收具有中心频率的感应通信信号。 该装置还包括配置成以高于中心频率两倍的速率对信号进行采样的模拟 - 数字转换器。 该设备还包括被配置为数字地下变频信号的一个或多个处理器。 处理器还被配置为将下变频信号的能量与检测阈值进行比较。 所述设备还包括被配置为基于所述比较选择性地发送通信的发射机。

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。