发明授权
- 专利标题: Continuously adjusted-bandwidth discrete-time phase-locked loop
- 专利标题(中): 连续调整带宽离散时间锁相环
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申请号: US11175924申请日: 2005-07-06
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公开(公告)号: US07145894B2公开(公告)日: 2006-12-05
- 发明人: David K. Mesecher , Rui Yang , Ramón Cerda
- 申请人: David K. Mesecher , Rui Yang , Ramón Cerda
- 申请人地址: US DE Wilmington
- 专利权人: InterDigital Technology Corporation
- 当前专利权人: InterDigital Technology Corporation
- 当前专利权人地址: US DE Wilmington
- 代理机构: Volpe and Koenig, P.C.
- 主分类号: H04B7/216
- IPC分类号: H04B7/216
摘要:
A user equipment which receives a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a correction signal and for combining the correction signal with the information signal to produce a corrected information signal. An analyzer analyzes the phase of the corrected information signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller recursively adjusts the phase of the corrected information signal such that the phase of said corrected information signal is substantially equal to said reference phase. The bandwidth controller selects a bandwidth within an adjustable range based on the error signal, estimates an offset based on the error signal, and modifies the correction signal using the offset.
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