发明名称 |
Radio transmission timing calibrator |
摘要 |
A signal calibrator (14) for a software-defined communications device (10) that enables device communications signals to be transmitted in a manner that maximally decouples the calibrator (14) from the device hardware (40), and that simplifies the design and reduces the cost of the communications device (10). The calibrator (14) includes a software modulator (16) for generating a nonstop stream of samples including zero valued samples and non-zero valued waveform bursts, and a software demodulator (18) connected to the software modulator (16) via a closed loop feedback path (20) that receives a nonstop stream of samples. The non-zero valued samples create radio emissions. The software demodulator (18) is for determining a timing error of the transmission sample and for transmitting a timing error correction value to the software modulator (16) via the closed loop feedback path (20). The timing error correction value enables the software modulator (16) to adjust a transmission time of a subsequent waveform burst to compensate for both unknown hardware delays and RF signal propagation delays.
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申请公布号 |
US6829229(B1) |
申请公布日期 |
2004.12.07 |
申请号 |
US20000570129 |
申请日期 |
2000.05.12 |
申请人 |
GENERAL DYNAMICS DECISION SYSTEMS, INC. |
发明人 |
PALERMO KEITH CHARLES;DURKIN MIKE FRANCIS |
分类号 |
H04B1/40;H04J3/06;(IPC1-7):H04J75/00 |
主分类号 |
H04B1/40 |
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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