Invention Grant
US08379692B2 Coherent combining/noncoherent detection (CCND) method and apparatus for detecting a pilot signal in a wireless communication system
有权
用于在无线通信系统中检测导频信号的相干组合/非相干检测(CCND)方法和装置
- Patent Title: Coherent combining/noncoherent detection (CCND) method and apparatus for detecting a pilot signal in a wireless communication system
- Patent Title (中): 用于在无线通信系统中检测导频信号的相干组合/非相干检测(CCND)方法和装置
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Application No.: US10289699Application Date: 2002-11-07
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Publication No.: US08379692B2Publication Date: 2013-02-19
- Inventor: Xiao-an Wang
- Applicant: Xiao-an Wang
- Applicant Address: US PA Allentown
- Assignee: Agere Systems LLC
- Current Assignee: Agere Systems LLC
- Current Assignee Address: US PA Allentown
- Agency: Ryan, Mason & Lewis, LLP
- Main IPC: H04B1/00
- IPC: H04B1/00

Abstract:
A method and apparatus are disclosed for detecting a pilot signal in a wireless receiver using coherent combining/noncoherent detection techniques. Coherent combining/noncoherent detection techniques are used to detect the pilot signal whenever the receiver is already frequency locked, or otherwise known to have a small frequency offset Conventional noncoherent combining/noncoherent detection techniques are utilized to initially acquire the timing of the forward channel. Once the receiver is frequency locked, coherent combining/noncoherent detection techniques may be used to continuously detect the pilot signals. After the receiver is frequency locked, the residue frequency error is small over several consecutive correlator outputs The correlator outputs can thus be combined coherently (since the frequency error is known to be small), and the phase dependency is then eliminated by noncoherent detection.
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