Title:
ADAPTIVE PHASE AND AMPLITUDE LINEARIZATION METHOD AND APPARATUS
Document Type and Number:
WIPO Patent Application WO2001084707
Kind Code:
A3
Abstract:
A apparatus for computing coefficient values for configuring a digital filter for compensating for non-linearity of an RF/IF device. The apparatus includes a reference signal generator, connected to an input of the RF/IF device, for generating an input reference signal to the RF/IF device. A vector signal analyzer, connected to an output of the RF/IF device, analyzes a response signal from the RF/IF device and outputs digital in-phase and quadrature-phase (I/Q) signals. A processor, connected to an output of said vector signal analyzer, computes a difference between the input reference signal and the digital in-phase and quadrature-phase (I/Q) signals. The processor calculates the coefficient values for configuring the digital filter based on the computed difference. A memory device, connected to the digital filter, stores the calculated coefficient values for the digital filter.
Inventors:
ERIKSSON PETER
Application Number:
PCT/IB2001/000365
Publication Date:
May 23, 2002
Filing Date:
March 14, 2001
Export Citation:
Assignee:
NOKIA NETWORKS OY (FI)
NOKIA INC (US)
NOKIA INC (US)
International Classes:
H03H17/02; (IPC1-7): H03F1/32
Foreign References:
| US5351016A | 1994-09-27 | |||
| US6054896A | 2000-04-25 | |||
| US5870668A | 1999-02-09 | |||
| EP0928062A1 | 1999-07-07 | |||
| US5923214A | 1999-07-13 | |||
| US5732333A | 1998-03-24 | |||
| US5959500A | 1999-09-28 |
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