公开(公告)号：WO2009081106A4

公开(公告)日：2009-08-27

申请号：PCT/GB2008004172

申请日：2008-12-18

Applicant: NORTEL NETWORKS LTD ,  Q FLAHERTY MARTIN ,  DOLMAN GRAHAM ,  MCGREGOR COLIN

Inventor： Q FLAHERTY MARTIN ,  DOLMAN GRAHAM ,  MCGREGOR COLIN

IPC: H03F1/32

CPC classification number: H03F1/3229 ,  H03F1/3247

Abstract: A linearised power amplifier including a predistorter and a feedforward circuit is described. By using both a predistorter and a feedforward cancellation system the linearisation of the amplifier is increased. The accuracy of the amplified signal may be further improved by training the predistorter using the error signal produced by the feedforward cancellation system. Improved accuracy in the lineariser results in a reduction in the power requirement of the error amplifier and a relaxation in the phase, amplitude and delay accuracy of the feedforward loop.

Abstract translation: 描述了包括预失真器和前馈电路的线性化功率放大器。 通过使用预失真器和前馈消除系统，放大器的线性化会增加。 通过使用由前馈消除系统产生的误差信号来训练预失真器，可以进一步提高放大信号的准确度。 线性化器中提高的精度导致误差放大器的功率要求降低以及前馈回路的相位，幅度和延迟精度的松弛。

公开(公告)号：WO2009081106A1

公开(公告)日：2009-07-02

申请号：PCT/GB2008/004172

申请日：2008-12-18

Applicant: NORTEL NETWORKS LIMITED ,  Q'FLAHERTY, Martin ,  DOLMAN, Graham ,  McGREGOR, Colin

Inventor： Q'FLAHERTY, Martin ,  DOLMAN, Graham ,  McGREGOR, Colin

IPC: H03F1/32

CPC classification number: H03F1/3229 ,  H03F1/3247

Abstract: A linearised power amplifier including a predistorter and a feedforward circuit is described. By using both a predistorter and a feedforward cancellation system the linearisation of the amplifier is increased. The accuracy of the amplified signal may be further improved by training the predistorter using the error signal produced by the feedforward cancellation system. Improved accuracy in the lineariser results in a reduction in the power requirement of the error amplifier and a relaxation in the phase, amplitude and delay accuracy of the feedforward loop.

Abstract translation: 描述了包括预失真器和前馈电路的线性化功率放大器。 通过使用预失真器和前馈消除系统，放大器的线性化将增加。 通过使用由前馈消除系统产生的误差信号训练预失真器，可以进一步提高放大信号的精度。 线性化提高的精度导致误差放大器的功率需求的降低以及前馈环路的相位，幅度和延迟精度的松弛。