New method of phase noise and intermodulation distortion reduction in high-order QAM systems

2002 ◽  
Author(s):  
J.J. Majewski
Keyword(s):  
Phase Noise ◽  
High Order ◽  
Intermodulation Distortion ◽  
New Method ◽  
Distortion Reduction

A NEW METHOD FOR SC CIRCUIT SYNTHESIS BASED ON THE VOLTAGE INVERSION CONCEPT

1996 ◽  
Vol 06 (01) ◽  
pp. 15-39 ◽  
Author(s):  
T. DELIYANNIS ◽  
I. HARITANTIS ◽  
G. ALEXIOU ◽  
C. PSYCHALINOS ◽  
A. LIMPERIS ◽  
...  
Keyword(s):  
Second Order ◽  
High Order ◽  
New Method ◽  
Circuit Synthesis ◽  
General Method

A new general method for SC circuit synthesis, based on the voltage inversion concept, is presented. According to the proposed method, first- and second-order SC equivalent admittances are developed and subsequently a number of SC subcircuits are derived. These subcircuits are used in the derivation of high order filters. Emphasis is given to integrator and second-order circuits. All the proposed circuits are fully parasitics free and compare favourably with known circuits. Two design examples of high order filters are also given. One of them was further designed in an IC form.

High-Order Melnikov Method for Time-Periodic Equations

2017 ◽  
Vol 17 (4) ◽  
pp. 793-818 ◽  
Author(s):  
Fengjuan Chen ◽  
Qiudong Wang
Keyword(s):  
Explicit Formula ◽  
Melnikov Method ◽  
Melnikov Function ◽  
High Order ◽  
New Method ◽  
Integral Formulas ◽  
Multiple Integrals ◽  
Time Periodic

AbstractThis paper discusses a high-order Melnikov method for periodically perturbed equations. We introduce a new method to compute {M_{k}(t_{0})} for all {k\geq 0}, among which {M_{0}(t_{0})} is the traditional Melnikov function, and {M_{1}(t_{0}),M_{2}(t_{0}),\ldots\,} are its high-order correspondences. We prove that, for all {k\geq 0}, {M_{k}(t_{0})} is a sum of certain multiple integrals, the integrand of which we can explicitly compute. In particular, we obtain explicit integral formulas for {M_{0}(t_{0})} and {M_{1}(t_{0})}. We also study a concrete equation for which the explicit formula of {M_{1}(t_{0})} is used to prove the existence of a transversal homoclinic intersection in the case of {M_{0}(t_{0})\equiv 0}.

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