发明名称 |
Phase-locked loop initialization via curve-fitting |
摘要 |
A method and apparatus for accurately estimating the carrier frequency offset and the carrier phase offset of a digitally modulated signal using a signal processing algorithm to initialize the state variables of a Phase-Locked Loop (PLL) is disclosed. A sequence of phase values is estimated from a received sequence of symbols and the angular effect due to the modulation format is removed from the sequence of phase values. A curve-fit algorithm based in one embodiment on the RLS algorithm is then applied to a sequence of unwrapped phase values to estimate the carrier frequency offset and the carrier phase offset.
|
申请公布号 |
US2002176520(A1) |
申请公布日期 |
2002.11.28 |
申请号 |
US20010809748 |
申请日期 |
2001.03.15 |
申请人 |
HEEGARD CHRIS;MURPHY PETER A. |
发明人 |
HEEGARD CHRIS;MURPHY PETER A. |
分类号 |
H03L7/06;H03L7/08;H04L27/00;H04L27/227;H04L27/38;(IPC1-7):H03D3/24 |
主分类号 |
H03L7/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|