公开(公告)号：US10045343B2

公开(公告)日：2018-08-07

申请号：US14767542

申请日：2014-02-24

Applicant: Agency for Science, Technology and Research

Inventor： Xi Chen

IPC: H04W72/04 ,  H04L27/22 ,  H04L27/00 ,  H03J7/04 ,  H04B17/318 ,  H04L27/26

Abstract: An automatic frequency control (AFC) device is provided. The AFC device includes an input module, a received signal strength indicator (RSSI) module and a carrier frequency offset (CFO) estimation module. The input module down converts and samples a received signal. The RSSI module is coupled to the input module and calculates a RSSI signal in response to the down converted and sampled received signal. The CFO estimation module is coupled to the input module and the RSSI module and calculates a moving average of binary elements of the down converted and sampled received signal. The CFO estimation module continues to calculate the moving average until the AFC converges.

公开(公告)号：US20160021662A1

公开(公告)日：2016-01-21

申请号：US14767542

申请日：2014-02-24

Applicant: Agency for Science, Technology and Research

Inventor： Xi Chen

IPC: H04W72/04 ,  H04L27/26 ,  H04B17/318

CPC classification number: H04W72/0453 ,  H03J7/04 ,  H04B17/318 ,  H04L27/0014 ,  H04L27/22 ,  H04L27/2657 ,  H04L2027/0028 ,  H04L2027/0055 ,  H04L2027/0065 ,  H04L2027/0069 ,  H04L2027/0073

Abstract: An automatic frequency control (AFC) device is provided. The AFC device includes an input module, a received signal strength indicator (RSSI) module and a carrier frequency offset (CFO) estimation module. The input module down converts and samples a received signal. The RSSI module is coupled to the input module and calculates a RSSI signal in response to the down converted and sampled received signal. The CFO estimation module is coupled to the input module and the RSSI module and calculates a moving average of binary elements of the down converted and sampled received signal. The CFO estimation module continues to calculate the moving average until the AFC converges.

Abstract translation: 提供自动频率控制（AFC）装置。 AFC设备包括输入模块，接收信号强度指示器（RSSI）模块和载波频率偏移（CFO）估计模块。 输入模块向下转换并采样接收到的信号。 RSSI模块耦合到输入模块，并响应于下变频和采样的接收信号计算RSSI信号。 CFO估计模块耦合到输入模块和RSSI模块，并计算下变频和采样的接收信号的二进制元素的移动平均值。 CFO估计模块继续计算移动平均线，直到AFC收敛。