发明授权
- 专利标题: Accelerated carrier acquisition method for a digital communication receiver
- 专利标题(中): 数字通信接收机的加速载波采集方法
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申请号: US13960625申请日: 2013-08-06
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公开(公告)号: US08842783B2公开(公告)日: 2014-09-23
- 发明人: Lazaro F. Cajegas, III
- 申请人: Comtech EF Data Corp.
- 申请人地址: US AZ Tempe
- 专利权人: Comtech EF Data Corp.
- 当前专利权人: Comtech EF Data Corp.
- 当前专利权人地址: US AZ Tempe
- 代理机构: Booth Udall Fuller, PLC
- 主分类号: H04L27/06
- IPC分类号: H04L27/06 ; H04B1/06
摘要:
A method of accelerated carrier signal acquisition for a digital communication receiver, the method comprising receiving a carrier signal by a receiver comprising a carrier recovery loop (CRL), setting the CRL to an open loop setting using a processor, setting a numerically controlled oscillator (NCO) within the CRL at a center frequency of the NCO, determining, by the processor, one or more initial parameters of the CRL, calculating an estimate and polarity for a sign frequency detection frequency using a sign frequency detector while simultaneously estimating a Fast Fourier Transform (FFT) frequency by running an FFT using the processor, comparing polarities of the estimates of the sign frequency detection frequency and FFT frequency and determining a frequency offset using the processor, and adjusting one or more parameters of the CRL based on the frequency offset using the processor.
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