US 7,321,264 B2
Method, arrangement and device for controlling predistortion
Andre Kokkeler, Borne (Netherlands)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (Sweden)
Appl. No. 10/596,041
PCT Filed Nov. 26, 2003, PCT No. PCT/NL03/00833
§ 371(c)(1), (2), (4) Date May 25, 2006,
PCT Pub. No. WO2005/053152, PCT Pub. Date Jun. 09, 2005.
Prior Publication US 2007/0096811 A1, May 03, 2007
Int. Cl. H03F 1/26 (2006.01)
U.S. Cl. 330—149  [455/114.3] 26 Claims
OG exemplary drawing
 
1. A predistortion control device comprising:
a first predistortion control input selectively connected to a power amplifier output;
a second predistortion control input selectively connected to a signal contact of a predistortion device; and
a predistortion control output selectively connected to a control contact of the predistortion device, the predistortion control device further including:
a cross-correlator device connected with
a first cross-correlator input to the first predistortion control input and
a second cross-correlator input to the second predistortion control input, wherein the cross-correlator device further has a cross-correlator output at which a cross-correlation signal can be presented, the cross-correlation signal representing a measured cross-correlation (Rm) of signals presented at the first cross-correlator input and the second cross-correlator input;
a predistortion function selector device, connected with
a selector input to the cross-correlator output, and with a selector output to the predistortion control output, said pre-distortion function selector device being arranged to compare the measured cross-correlation with a cross-correlation model stored in a memory and determining on the basis of said comparison a suitable predistortion function and presenting a predistortion control signal at said selector output said predistortion control signal representing said predistortion function.