专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明授权

US06980775B2 Automatic frequency control (AFC) system and method using an adaptive threshold to improve accuracy of the direct current (DC) component calculation for a received signal 有权
标题翻译：使用自适应阈值的自动频率控制（AFC）系统和方法来提高接收信号的直流（DC）分量计算的精度
公开(公告)号：US06980775B2
公开(公告)日：2005-12-27
申请号：US10331218
申请日：2002-12-30
申请人： Scott Michael Alazraki , Amish Pravinbhai Shah , Jesus Francisco Corretjer
发明人： Scott Michael Alazraki , Amish Pravinbhai Shah , Jesus Francisco Corretjer
IPC分类号： H03J7/04 , H04B1/40
CPC分类号： H03J7/04
摘要： A radio device requires a tunable transceiver such that the transceiver can be accurately set to a desired frequency. When a signal with known frequency accuracy is being received, an offset detector can determine the frequency offset generated by the transceiver due to improper tuning. An automatic frequency control (AFC) system (100) is comprised of a tunable transceiver, an adaptive detector (102) for comparing an incoming sample from the tunable transceiver to an adaptive maximum deviation threshold for determining if a sample from the tunable transceiver should be used for the direct current (DC) component of the AFC, an offset detector (103) and an AFC control processor (105) for utilizing information from the offset detector to reduce the inaccuracy in frequency by tuning the transceiver towards the received signal frequency. The AFC control processor (105) utilizes one of more threshold levels for defining a maximum correction threshold (311) based upon the desired maximum offset correction.
摘要翻译：无线电设备需要可调谐收发器，使得收发器可以被精确地设置到期望的频率。当接收到具有已知频率精度的信号时，偏移检测器可以由于不正确的调谐而确定由收发器产生的频率偏移。自动频率控制（AFC）系统（100）包括可调谐收发器，自适应检测器（102），用于将来自可调谐收发机的输入采样与自适应最大偏差阈值进行比较，用于确定来自可调谐收发器的样本是否应为用于AFC的直流（DC）分量，偏移检测器（103）和AFC控制处理器（105），用于利用来自偏移检测器的信息，通过将收发器调谐到接收信号频率来减少频率的不精确度。 AFC控制处理器（105）利用多个阈值电平中的一个来基于所需的最大偏移校正来定义最大校正阈值（311）。

IPRDB

热门服务

关于我们

友情链接

联系方式