Title :
Estimation of in-band distortion in digital communication system
Author :
Gharaibeh, Khaled M. ; Gard, Kevin G. ; Steer, Michael B.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
A generalized approach for estimating in-band distortion spectrum when a wireless communication signal is processed by a nonlinear amplifier is presented. The output spectrum is represented as the sum of uncorrelated components using Gram-Schmidt orthogonalization without any restriction on the statistical properties of the input signals. The analysis allows the accurate estimation of in-band distortion and hence the effective SNR, Rho and EVM of wireless communication systems. The approach is verified by measurements of in-band distortion using feed-forward cancellation.
Keywords :
digital communication; feedforward amplifiers; frequency estimation; nonlinear distortion; spectral analysis; Gram-Schmidt orthogonalization; digital communication system; feed-forward cancellation; in-band distortion estimation; nonlinear amplifier; wireless communication system; Digital communication; Distortion measurement; Nonlinear distortion; Phase modulation; Phase noise; Power system modeling; Radio transmitters; Signal to noise ratio; State estimation; Wireless communication;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1517127
