Title :
Toward an Efficient and Reliable Nonlinearity Measure
Author :
Helaly, Tarek K. ; Dansereau, Richard M.
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, ON, Canada
fDate :
11/1/2012 12:00:00 AM
Abstract :
In this letter, an efficient and reliable nonlinearity measure for quantifying the nonlinear distortion (NLD) is formulated. In order to achieve such a formulation, the bit error rate (BER) performance of the downlink of direct sequence-code division multiple access, in presence of NLD caused by a predistorter-high power amplifier (PD-HPA) is investigated. Exponential curve fitting is used to develop an approximate expression for the BER performance, through which the nonlinearity measure is formulated. The proposed measure is characterized by having a direct link with the BER performance in addition of being dependent of the input back-off level.
Keywords :
code division multiple access; curve fitting; error statistics; nonlinear distortion; power amplifiers; spread spectrum communication; telecommunication network reliability; BER; NLD; PD-HPA; bit error rate; direct sequence code division multiple access; exponential curve fitting; nonlinear distortion; nonlinearity measure; predistorter high power amplifier; reliability; Bit error rate; Distortion measurement; Downlink; Multiaccess communication; Nonlinear distortion; Reliability; Signal to noise ratio; CDMA; curve fitting; nonlinear distortion; nonlinearity severity measure;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.092812.121649
