发明名称 |
METHOD OF DIFFERENTIAL-PHASE/ABSOLUTE-AMPLITUDE QAM |
摘要 |
A method of quadrature amplitude modulation involving encoding phase differentially and amplitude absolutely, allowing for a high data rate and spectral efficiency in data transmission and other communication applications, and allowing for amplitude scaling to facilitate data recovery; amplitude scale tracking to track-out rapid and severe scale variations and facilitate successful demodulation and data retrieval; 2<SUP>N </SUP>power carrier recovery; incoherent demodulation where coherent carrier recovery is not possible or practical due to signal degradation; coherent demodulation; multipath equalization to equalize frequency dependent multipath; and demodulation filtering.
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申请公布号 |
US2007230552(A1) |
申请公布日期 |
2007.10.04 |
申请号 |
US20060560090 |
申请日期 |
2006.11.15 |
申请人 |
HONEYWELL FEDERAL MANUFACTURING & TECHNOLOGIES, LLC |
发明人 |
DIMSDLE JEFFREY W. |
分类号 |
H03H7/30;H04B1/10;H04L5/12;H04L27/34 |
主分类号 |
H03H7/30 |
代理机构 |
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代理人 |
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地址 |
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