scholarly journals A Robust Nonlinear RLS Type Adaptive Filter for Second-Order-Intermodulation Distortion Cancellation in FDD LTE and 5G Direct Conversion Transceivers

2019 ◽  
Vol 67 (5) ◽  
pp. 1946-1961 ◽  
Author(s):  
Andreas Gebhard ◽  
Oliver Lang ◽  
Michael Lunglmayr ◽  
Christian Motz ◽  
Ram Sunil Kanumalli ◽  
...  
Keyword(s):  
Adaptive Filter ◽  
Direct Conversion ◽  
Second Order ◽  
Intermodulation Distortion

scholarly journals Probing the Locally Generated Even and Odd Order Nonlinearity in Y–Ba–Cu–O and Tl–Ba–Ca–Cu–O (2212) Microwave Resonators Around <img src="/images/tex/19586.gif" alt="T_{\rm C}">

2013 ◽  
Vol 23 (3) ◽  
pp. 9000105-9000105 ◽  
Author(s):  
Brooke Jeries ◽  
Sean Cratty ◽  
S Remillard
Keyword(s):  
Meissner Effect ◽  
Second Order ◽  
Intermodulation Distortion ◽  
Coaxial Cable ◽  
Superconducting Resonators ◽  
Third Order ◽  
Odd Order ◽  
Similar Temperature Dependence ◽  
Similar Temperature ◽  
Lower Temperature

Spatial scanning of the synchronously generated second- and third-order intermodulation distortion in superconducting resonators uncovers local nonlinearity hot spots, and possible time reversal symmetry breaking, using a simple probe fashioned from coaxial cable. It is clear that even and odd order nonlinearity in these samples do not share the same physical origins, because their temperature and static magnetic field dependences are quite different. 2nd order intermodulation distortion remains strong in these measurements as the temperature continues to drop belowTCto 77 K even though the 3rd order peaks nearTCand becomes smaller at lower temperature as predicted by the nonlinear Meissner effect. Both YBa2Cu3O7and Tl2Ba2CaCu2O8resonators of the same structure exhibit similar temperature dependence in the second order with second order remaining high at lower temperature. The YBa2Cu3O7sample has lower third-order intermodulation distortion with a pronounced peak atTC.

Effect of varying threshold gain on second order intermodulation distortion in distributed feedback lasers

1990 ◽  
Vol 26 (20) ◽  
pp. 1720 ◽  
Author(s):  
H. Kawamura ◽  
K. Kamite ◽  
H. Yonetani ◽  
S. Ogita ◽  
H. Soda ◽  
...  
Keyword(s):  
Second Order ◽  
Distributed Feedback ◽  
Intermodulation Distortion ◽  
Distributed Feedback Lasers ◽  
Threshold Gain
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