Carrier recovery in amplitude and phase modulated systems
US8958504B2 · kind B2 · utility
25Cited by
12References
19Claims
0Family size
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Key dates
| Filing date | Sep 7, 2012 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Feb 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0069
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method is provided. A multi-amplitude signal is received and downconverted so as to generate I and Q signals using a local oscillator signal. The I and Q signals are equalized, and the equalized I and Q signals are digitized. First and second gains are adjusted with the second and first digital signals, respectively, and applied to the equalized I and Q signals, respectively. The difference between the first and second amplified signals is determined, and an error signal is generated from the difference between the first and second amplified signals. The local oscillator signal is then adjusted with the error signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.