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This paper presents a signal-to-noise ratio (SNR) insensitive Doppler shift estimator based on the square envelope autocorrelation function (SEACF) of mobile propagation channels, where an iterative processing is employed to eliminate the approximation error and the effects of additive noise. Both theory and simulation show a good SNR-insensitive performance in a wide range of velocities and SNRs.
A joint channel estimation and data detection scheme by using Markov chain Monte Carlo (MCMC) is proposed for MIMO-OFDM systems with multi-tone narrow-band interference (MTNBI). The channel impulse response, the noise variance and the indicator of the impulse noise can be estimated accurately, and then the receiver knows whether the signal is interfered by the narrow band interference. One of the...
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