Title :
Analysis of HF data communication signals using the lag-windowed Wigner-Ville distribution
Author :
Bin Sha´ameri, Ahmad Zuri
Author_Institution :
Fac. of Elect. Engr., Universiti Teknologi Malaysia, Skudai, Malaysia
Abstract :
Time-frequency analysis is used to analyze digital modulation signals such as FSK (frequency shift-keying) and ASK (amplitude shift-keying) in HF (high frequency) radio communications. A new time-frequency distribution, the lag-windowed Wigner-Ville distribution (LWWVD), improves the time-frequency representation by minimizing the interference terms due to the cross-term. Comparisons are made with the conventional Wigner-Ville distribution (WVD), reduced interference distributions (RID) and other related methods, based on the criteria of the mainlobe width and the signal-to-interference ratio. Consistently, the LWWVD gives the most accurate time-frequency representation for ASK and FSK signals
Keywords :
Wigner distribution; amplitude shift keying; data communication; frequency shift keying; parameter estimation; radio links; radiofrequency interference; signal processing; ASK; FSK; HF data communication signal analysis; amplitude shift-keying; cross-term; digital modulation signals; frequency shift-keying; high frequency radio communications; interference terms; lag-windowed Wigner-Ville distribution; mainlobe width; modulation parameter estimation; reduced interference distributions; signal-to-interference ratio; time-frequency analysis; Amplitude shift keying; Data analysis; Data communication; Digital modulation; Frequency shift keying; Interference; RF signals; Radio communication; Signal analysis; Time frequency analysis;
Conference_Titel :
Signal Processing and its Applications, Sixth International, Symposium on. 2001
Conference_Location :
Kuala Lumpur
Print_ISBN :
0-7803-6703-0
DOI :
10.1109/ISSPA.2001.949824
