Method and apparatus for low intermodulation distortion amplification in selected bands
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 26, 2005
Grant Date -
Nov 25, 2004
app pub date -
May 21, 2003
filing date -
May 21, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and apparatus for reducing intermodulation distortion is disclosed. In one embodiment, the method comprises the steps of accepting a sampled input signal V(t) wherein the input signal V(t) comprises a plurality of peaks; determining n peaks Vp1,Vp2, . . . Vpn of the sampled input signal V(t) exceeding a clip value Vclip at times t1, t2, . . . tn; and modifying the sampled input signal V(t) by weighting the n peaks Vp1,Vp2, . . . ,Vpn exceeding the clip value Vclip of the sampled input signal V(t) by a function b(t) wherein b(t) is either a hard limiting function or b(t)=f(a1, a2, . . . an;t-;tp1,t-;tp2, . . . t-;tpn), wherein a1,a2, . . . an are weight values corresponding to the n peaks Vp1, Vp2, . . . Vpn, and f(t-;tp1,t-;tp2, . . . t-;tpn) is a smooth shaping function. Intermodulation performance is then selectively improved in selected sub-bands by notch filtering prior to application to the non-linearity.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully