发明授权
- 专利标题: Automatic gain control methods and apparatus suitable for use in OFDM receivers
-
申请号: US10414576申请日: 2003-04-14
-
公开(公告)号: US07065165B2公开(公告)日: 2006-06-20
- 发明人: Jari M. Heinonen , Michael R. Hirano , Hongliang Zhang
- 申请人: Jari M. Heinonen , Michael R. Hirano , Hongliang Zhang
- 申请人地址: US GA Atlanta
- 专利权人: Cingular Wireless II, LLC
- 当前专利权人: Cingular Wireless II, LLC
- 当前专利权人地址: US GA Atlanta
- 代理机构: Parks Knowlton LLC
- 代理商 J. Perry Herndon, Esq.; Coulter C. Henry
- 主分类号: H04L27/08
- IPC分类号: H04L27/08
摘要:
Automatic gain control (AGC) methods and apparatus suitable for use in orthogonal frequency division multiplexing (OFDM) receivers are described. One AGC method includes the steps of repeatedly performing a first AGC process which adjusts amplifier gain based on determining that a signal level of multiple time sample values is outside a limit set by a first predefined threshold; and repeatedly performing a second AGC process which adjusts the amplifier gain based on determining that a signal level of multiple frequency sample values associated with a plurality of pilot tones is outside a limit set by a second predefined threshold. Preferably, the first AGC process is performed repeatedly at a first rate and the second AGC process is performed repeatedly at a second rate that is less than the first rate.