Adaptive predistortion method and arrangement
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsTony Fonden, Richard Hellberg, Mats Klingberg
Life of this patent
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Abstract
An adaptive predistortion arrangement includes means (26, 40, 42, 44, 46) for up-converting a baseband signal (S1) into an intermediate frequency signal (S12) having frequency aliazing and means (18, 20, 220, 24, 26) for down-converting a radio frequency signal (S4) into an intermediate frequency signal (S7) having the same frequency aliazing as the up-converted baseband signal. An adapter (34) adapts predistortion parameters to keep the up-converted baseband signal equal to the down-converted radio frequency signal.
Claims13
1-12. (canceled)
An adaptive predistortion method, in which a predistorted baseband signal is converted into a radio frequency signal to be transmitted, characterized by
- up-converting said baseband signal into an intermediate frequency signal having frequency aliazing;
- down-converting said radio frequency signal into an intermediate frequency signal having the same frequency aliazing as said up-converted baseband signal;
- and
- adapting predistortion parameters to keep said up-converted baseband signal equal to said down-converted radio frequency signal.
An adaptive predistortion arrangement, in which a predistorted baseband signal is converted into a radio frequency signal to be transmitted, characterized by means for up-converting said baseband signal into an intermediate frequency signal having frequency aliazing;
- means for down-converting said radio frequency signal into an intermediate frequency signal having the same frequency aliazing as said up-converted baseband signal;
- and
- an adapter for adapting predistortion parameters to keep said up-converted baseband signal equal to said down-converted radio frequency signal.
Dependencies are inferred from the claim text.