Digital modulation classification using constellation shape
Signal Processing
A new technique to reduce cross terms in the Wigner distribution
Digital Signal Processing
Digital Signal Filtering, Analysis and Restoration (Telecommunications Series)
Digital Signal Filtering, Analysis and Restoration (Telecommunications Series)
Time--frequency feature representation using energy concentration: An overview of recent advances
Digital Signal Processing
Adaptive optimal kernel smooth-windowed wigner-ville distribution for digital communication signal
EURASIP Journal on Advances in Signal Processing
Digital Video and Audio Broadcasting Technology: A Practical Engineering Guide
Digital Video and Audio Broadcasting Technology: A Practical Engineering Guide
Time-frequency representation based on an adaptive short-time Fourier transform
IEEE Transactions on Signal Processing
Modulation and Coding Techniques in Wireless Communications
Modulation and Coding Techniques in Wireless Communications
Performance of quadratic time-frequency distributions as instantaneous frequency estimators
IEEE Transactions on Signal Processing
Use of the cross Wigner-Ville distribution for estimation ofinstantaneous frequency
IEEE Transactions on Signal Processing
Polynomial Wigner-Ville distributions and their relationship totime-varying higher order spectra
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Analytic signal generation-tips and traps
IEEE Transactions on Signal Processing
Time-varying techniques for multisensor signal detection
IEEE Transactions on Signal Processing
On the cramer-rao bound for carrier frequency estimation in the presence of phase noise
IEEE Transactions on Wireless Communications
IEEE Transactions on Signal Processing
Statistical modeling and denoising Wigner-Ville distribution
Digital Signal Processing
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Cross time-frequency distribution (XTFD), unlike the quadratic time-frequency distribution (QTFD), can represent phase information for phase shift keying (PSK) signals such as binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK). However, it suffers from interference due to duplicated terms that cause inaccuracy in the phase estimate. Thus, a time-dependent lag window is proposed in this article where the window width is adaptively adjusted according to the localized lag autocorrelation function (LLAC). This adaptive windowed cross Wigner-Ville distribution (AWXWVD) is proven capable to remove most of the duplicated terms. The instantaneous information bearing phase (IIB-phase) is then estimated from the peak of the cross time-frequency representation (XTFR). Simulation results show that the AWXWVD is an optimum phase estimator as it meets the Cramer-Rao lower bound (CRLB) at SNR=5 dB and SNR=6 dB for BPSK and QPSK signals respectively. The AWXWVD also outperforms the conventional IQ demodulator as a phase estimator with difference in the IIB-phase variance of about 5 dB.