发明公开
- 专利标题: METHOD AND DEVICE FOR FINE SYNCHRONIZATION OF A DIGITAL TELECOMMUNICATION RECEIVER
- 专利标题(中): 方法和设备进行精细同步数字通信接收机
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申请号: EP02787694.5申请日: 2002-11-15
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公开(公告)号: EP1561286A1公开(公告)日: 2005-08-10
- 发明人: ETTORRE, Donato , GRAZIANO, Maurizio,Telecom Italia S.p.A. , MELIS, Bruno,Telecom Italia S.p.A. , FINOTELLO, Andrea , RUSCITTO, Alfredo
- 申请人: Telecom Italia S.p.A. , STMicroelectronics S.r.l.
- 申请人地址: Piazza degli Affari 2 20123 Milano IT
- 专利权人: Telecom Italia S.p.A.,STMicroelectronics S.r.l.
- 当前专利权人: Telecom Italia S.p.A.,STMicroelectronics S.r.l.
- 当前专利权人地址: Piazza degli Affari 2 20123 Milano IT
- 代理机构: Giannesi, Pier Giovanni
- 国际公布: WO2004047326 20040603
- 主分类号: H04B1/707
- IPC分类号: H04B1/707
摘要:
A method for the synchronization of a digital telecommunication receiver comprises the steps of: - storing a plurality of consecutive samples E-l, E, M, L, L+1 of an incoming spread spectrum signal in a delay line 56; - determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a first digitally controlled interpolator 26, an interpolated early sample (e) anticipating an optimal sampling time instant; - determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a second digitally controlled interpolator 24, an interpolated middle sample (m) corresponding to the optimal sampling time instant; - determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a third digitally controlled interpolator 28, an interpolated late sample (1) delayed with respect to the optimal sampling time instant; - calculating an error signal ξ as the difference between the energy of the symbols computed from the interpolated early sample (e) and the interpolated late (1) sample; - extracting the sign of the error signal ξ - accumulating the sign of the error signal ξ for the generation of control signals SE, SM, SL for controlling the interpolation phases of the digitally controlled interpolators used for determining the interpolated early (e), middle (m) and late (l) samples. The accumulated value has a positive saturation value of +4 and a negative saturation value of 4.
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