发明名称 |
Apparatus and method for detecting digital FM |
摘要 |
A symbol detector for frequency modulated (FM) symbols includes a section determiner, a direction of movement determiner and a data symbol determiner. The section determiner receives a sample of in-phase and quadrature signals associated with a baseband transmitted FM symbol and determines the section value of a unit circle in an in-phase-quadrature coordinate system in which the sample lies. The direction of movement determiner receives the section value of a current sample and the section value of a neighboring sample and generates a positive direction of movement value if the direction of movement along the unit circle from the neighboring sample to the current sample is counterclockwise, a negative direction of movement value if the direction of movement is clockwise and 0 otherwise. The data symbol determiner receives the direction of movement values and decodes the transmitted FM symbol by masking N direction of movement values.
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申请公布号 |
US5994953(A) |
申请公布日期 |
1999.11.30 |
申请号 |
US19980049870 |
申请日期 |
1998.03.27 |
申请人 |
D.S.P.C. TECHNOLOGIES LTD. |
发明人 |
BURSHTEIN, DAVID;RAINISH, DORON |
分类号 |
H04L25/49;H04L27/152;(IPC1-7):H04L27/14 |
主分类号 |
H04L25/49 |
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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