BER of OFDM System With Multiple NBI Rejection Cascade Complex Coefficient Adaptive IIR Notch Filter
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Date
2012-08-16
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Scientific Research
Abstract
In this paper, rejection of multiple narrowband interferers in a binary phase shift keying modulated orthogonal fre-
quency division multiplexing (BPSK-OFDM) system is investigated. The BPSK-OFDM system in consideration oper-
ates in an additive white Gaussian noise (AWGN) channel. A cascade complex coefficient adaptive infinite impulse
response (IIR) notch filter with gradient-based algorithm is used to reject the interferers. Bit error ratio (BER) perform-
ance of the system is studied and a general closed-form expression is derived assuming negligible steady-state leakage
NBI and by estimating the decision variable as Gaussian distributed based on Central Limit Theorem (CLT). Depend-
ence of the BER performance on the notch bandwidth coefficient is demonstrated by the analysis. Extensive simulation
results are included to substantiate accuracy of the analysis.
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This Research Article Was Published by Scientific Research in 2012