Title :
Higher order adaptive filter based predistortion for nonlinear distortion compensation of radio over fiber links
Author :
Fernando, Xavier N. ; Sesay, Abu B.
Author_Institution :
TRLabs, Calgary, Que., Canada
Abstract :
The biggest limitation of radio over fiber (ROF) links in a wireless network is its limited dynamic range due to `non-linear distortions´ (NLD). In this paper a higher order adaptive filter based modeling and predistortion scheme is proposed to compensate this NLD. The filter is adapted from the distortions of vector-modulated symbols, so that no in-depth knowledge of physical link parameters is needed. Experimental and simulation results show that a third order filter accurately models the ROF link while a second order filter adequately compensates for the phase nonlinearity. The power handling capability of the laser diode is the upper limit in this approach
Keywords :
FIR filters; adaptive filters; adaptive signal processing; filtering theory; microcellular radio; nonlinear distortion; optical fibre communication; optical links; optical modulation; radio networks; semiconductor lasers; ROF link; dynamic range; experimental results; higher order FIR adaptive filter; higher order adaptive filter based predistortion; laser diode; microcellular wireless networks; nonlinear distortion compensation; phase nonlinearity compensation; power handling capability; radio over fiber links; second order filter; simulation results; third order filter; vector-modulated symbols; wireless network; Adaptive filters; Diode lasers; Distributed feedback devices; Dynamic range; Finite impulse response filter; Nonlinear distortion; Optical fiber communication; Optical fiber filters; Predistortion; Wireless networks;
Conference_Titel :
Communications, 2000. ICC 2000. 2000 IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-6283-7
DOI :
10.1109/ICC.2000.853283
