公开(公告)号：US20060158254A1

公开(公告)日：2006-07-20

申请号：US11038928

申请日：2005-01-18

申请人： Michael Johnson ,  Michael Andrews ,  Robert Bramble

发明人： Michael Johnson ,  Michael Andrews ,  Robert Bramble

IPC分类号： H03F1/26

CPC分类号： H03F1/3247 ,  H03F1/3241 ,  H04B2001/0416 ,  H04B2001/0425

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.

摘要翻译： 射频（RF）发射机功率放大器电路通过预失真放大器输入信号来提供实际的线性性能，以补偿在高功率电平下的放大器失真，并且提供了处理复杂调制方案所需的放大器功率的精细程度 并快速变化的电源要求。 预失真数据库（20）包含各种传输类型的增益和相位校正，并且单独的自动增益控制数据库（38）包含精细的放大器增益校正。 实时处理器（26）组合两种类型的校正并将其应用于放大器输入信号，并且后台处理器（16）根据可编程优先级方案不断更新两个数据库。 预失真和放大器功率控制的集成以最小化一种控制的不利影响的方式实现。 本发明的一个特征提供了预失真校正的快速收敛。