发明名称 |
Efficient method and means for integration of power control and predistortion in a transmitter |
摘要 |
A radio-frequency (RF) transmitter power amplifier circuit provides for practically linear performance by predistorting the amplifier input signals to compensate for amplifier distortion at high power levels, and provides a fine degree of control of amplifier power needed to handle complex modulation schemes with widely and rapidly varying power requirements. A predistortion database (20) contains gain and phase corrections for various transmission types and a separate automatic gain control database (38) contains fine amplifier gain corrections. A real-time processor (26) combines the two types of corrections and applies them to the amplifier input signals, and a background processor (16) continually updates both databases in accordance with a programmable priority scheme. Integration of predistortion and amplifier power control is achieved in a manner that minimizes adverse effects of one type of control on the other. One feature of the invention provides for rapid convergence of the predistortion correction.
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申请公布号 |
EP1681771(A1) |
申请公布日期 |
2006.07.19 |
申请号 |
EP20060250148 |
申请日期 |
2006.01.12 |
申请人 |
NORTHROP GRUMMAN CORPORATION |
发明人 |
JOHNSON, MICHAEL P.;ANDREWS, MICHAEL S.;BRAMBLE, ROBERT A. |
分类号 |
H04B1/04;H03F1/32 |
主分类号 |
H04B1/04 |
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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