发明名称 |
METHOD AND APPARATUS FOR ADAPTIVELY CLASSIFYING A MULTI-LEVEL SIGNAL |
摘要 |
A radio receiver (200) is used for receiving a multi-level (4) signal that includes a plurality of symbols (3200sps), wherein each level is representative of a symbol of data. Baseband samples are generated for each symbol, whereby each baseband sample has a phase and a signal level. The radio receiver circuit (200) measures the received signal environment. A digital circuit (212) selects a scan duration (90 milliseconds) from a scan duration table based on the measured signal environment and a combination of signal types (4 level versus 2 level) used for classification of the received signal. The digital circuit tallies, by categories (800hz), occurrences (0- 80Hz) of the baseband samples, whereby each category is representative of one of a plurality of phases (6), and one of the plurality of signal level ranges. The digital circuit selects a set of optimized thresholds based on the measured signal environment and a combination of signal types (4 level versus 2 level), and correlates the tallies to at least one template and classifies the multi-level (4) signal according to the correlation results and the selected optimized thresholds.
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申请公布号 |
WO0069137(A1) |
申请公布日期 |
2000.11.16 |
申请号 |
WO2000US11471 |
申请日期 |
2000.04.28 |
申请人 |
MOTOROLA, INC. |
发明人 |
TAUBENHEIM, DAVID, B.;KELLEY, BRIAN, T.;JOHNSON, DAVID, M. |
分类号 |
H04B1/28;H04L25/02;H04L27/00;H04L27/10;(IPC1-7):H04L27/16;H03D1/04;H03K5/01;H03K9/02;H04L1/00;H04L25/06 |
主分类号 |
H04B1/28 |
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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