Patent ID: 8897728
Filing Date: 2014-11-25
Classification: H03F,H04B

Abstract:
1. A computer software product, comprising a non-transitory medium readable by a processor, the medium having stored thereon a set of instructions for quantifying memory effects and comparison in RF transmitters and amplifiers, the set of instructions including: (a) a first sequence of instructions which, when executed by the processor, causes said processor to perform a spectrum analysis of an RF emitter device under test (DUT); (b) a second sequence of instructions which, when executed by the processor, causes said processor to calculate a normalized frequency (f where f is the frequency in MHz, f c is the carrier frequency, and BW is the signal bandwidth in MHz; (c) a third sequence of instructions which, when executed by the processor, causes said processor to calculate a spectrum asymmetry index (SAI) characterized by the relation: where P(f n ) is the power spectrum density of the measured output signal, f n is the normalized frequency, K is the number of frequency terms in the summation, and f n,start and f n,stop are the lower and the upper frequency bounds used for SAI calculation, respectively; (d) a fourth sequence of instructions which, when executed by the processor, causes said processor to display the calculated SAI; and (e) a fifth sequence of instructions which, when executed by the processor, causes said processor to display a mirrored spectra comprised of said calculated SAI around a zero frequency utilizing the absolute value of said normalized frequency according to the relation: where f n is the normalized frequency, f is the frequency in MHz, f c is the carrier frequency, and BW is the signal bandwidth in MHz.