Abstract
In this paper, the performance of cellular digital mobile radio systems is studied using differential phase shift keying (DPSK) in a frequency nonselective Rayleigh fading environment with lognormal shadowing, including the effects of (white) Gaussian noise, narrow-band impulsive noise interference (Middleton’s Class A model), and cochannel interference. Performance of cellular digital mobile radio systems is analyzed in terms of probability of bit error. The robustification is based on the concept of M-estimators found in the robust statistics. A new M-estimator-based structure for demodulation of differentially phase-shift keyed (DPSK) signals is proposed and analyzed. The approach is also corroborated with simulation results and these simulation results show that, in highly impulsive noise, the proposed detector with significant performance gain outperforms the linear decorrelating detector, the Huber, and the Hampel M-estimator based detectors with little attendant increase in computational complexity.
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