Level crossing rate estimation with Doppler adaptive noise suppression technique in frequency domain

The maximum Doppler frequency, or, equivalently, the mobile speed, is very useful information for optimizing the performance of many wireless communication systems. The paper proposes an improved method for estimating the maximum Doppler frequency based on the level crossing rate (LCR) estimator. To reduce the effect of additive noise, the proposed algorithm uses a novel Doppler adaptive noise suppression (DANS) process in the frequency domain. The proposed DANS process does not require additional channel information such as signal-to-noise ratio (SNR).