发明名称 |
Digitally sampled phase quantized FM detector for a communication receiver |
摘要 |
A digital phase quantized frequency modulation (FM) detector (300) is for a communication receiver (100). A digital phase FM quantizer receives (310) I and Q signals (221, 222) derived from a received FM signal (119) and generates a coded position word (381) of width M bits at the beginning of each period of a sample clock (190) that identifies a sector location of a phasor representing the I and Q signals. A two's complement converter (400) converts the coded position word into a two's complement position word of width M bits. A differentiator (420) of width M bits generates a two's complement difference word which represents a change of a phase angle of the phasor in magnitude and direction during each period of the sample clock. A digital post detection filter filters consecutive two's complement difference words and generates therefrom a reconstructed digital demodulated signal (461).
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申请公布号 |
US6055282(A) |
申请公布日期 |
2000.04.25 |
申请号 |
US19980055431 |
申请日期 |
1998.04.06 |
申请人 |
MOTOROLA |
发明人 |
HUGHES, JAMES DAVID;LUFF, GWILYM FRANCIS |
分类号 |
H04L27/144;(IPC1-7):H03D1/00 |
主分类号 |
H04L27/144 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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