Frequency estimators with high resistance to interference from image frequency components

Polynomial Estimators for High Frequency Moments

We present an algorithm for computing Fp, the pth moment of an n-dimensional frequency vector of a data stream, for 2 < p < log(n), to within 1 ± ǫ factors, ǫ ∈ [n, 1] with high constant probability. Letm be the number of stream records andM be the largest magnitude of a stream update. The algorithm uses space in bits O(pǫnE(p, n) log(n) log(nmM)/min(log(n), ǫ)) where, E(p, n) = (1 − 2/p)(1 − n...

Efficient Single Frequency Estimators

The estimation of the frequency of a single sinusoid embedded in additive white Gaussian noise is one of the classical problems of signal processing. It has importance in many applications in communications, where frequency estimation is used for decoding, and in radar processing and sonar processing. The problem of frequency estimation has been widely explored, but there is still room for a be...

[High frequency components in the electrocardiogram].

Removing interference components in time-frequency representations using morphological operators

Time-frequency representations have been of great interest in the analysis and classification of non-stationary signals. The use of highly selective transformation techniques is a valuable tool for obtaining accurate information for studies of this type. The Wigner-Ville distribution has high time and frequency selectivity in addition to meeting some interesting mathematical properties. However...

The apparent immunity of high-frequency "transposed" stimuli to low-frequency binaural interference.

Discrimination of interaural temporal disparities (ITDs) was measured with either conventional or transposed "targets" centered at 4 kHz. The targets were presented either in the presence or absence of a simultaneously gated diotic noise centered at 500 Hz, the interferer. As expected, the presence of the low-frequency interferer resulted in substantially elevated threshold-ITDs for the convent...