Title :
The impact of nonlinear amplification on the performance of CDMA systems
Author :
Gharaibeh, Khaled M. ; Gard, Kevin ; Steer, Michael B.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
An analytical formulation, separating the correlated and uncorrelated distortion spectrum when a wireless communication signal is processed by a nonlinear amplifier, is presented. The correlated distortion spectrum relates directly to gain compression or expansion while the uncorrelated distortion spectrum contributes to degradation of the signal-to-noise ratio (SNR). The uncorrelated distortion spectrum is used to calculate the bit error rate (BER) when a nonlinear amplifier is followed by an AWGN channel. BER performance, predicted from the uncorrelated distortion spectrum, is in excellent agreement with simulated BER.
Keywords :
AWGN channels; cochannel interference; code division multiple access; correlation methods; error statistics; mobile radio; nonlinear distortion; nonlinear network analysis; nonlinear systems; power amplifiers; AWGN channel; BER; CDMA systems; SNR; co-channel distortion; correlated distortion spectrum; digital mobile radio; gain compression; gain expansion; in-band distortion; nonlinear amplification; nonlinear amplifier; nonlinear spectral analysis; power amplifier nonlinearity; spectral regrowth; uncorrelated distortion spectrum; AWGN channels; Bit error rate; Degradation; Multiaccess communication; Nonlinear distortion; Predictive models; Signal analysis; Signal processing; Signal to noise ratio; Wireless communication;
Conference_Titel :
Radio and Wireless Conference, 2004 IEEE
Print_ISBN :
0-7803-8451-2
DOI :
10.1109/RAWCON.2004.1389077
