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Time-Frequency Analysis of FSK Digital Modulation Signals using the Smooth Lag-Windowed Wigner-Ville Distribution.

Sha'ameri, Ahmad Zuri (2003) Time-Frequency Analysis of FSK Digital Modulation Signals using the Smooth Lag-Windowed Wigner-Ville Distribution. In: The 9th Asia-Pacific Conference on Communications, 2003.

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Abstract

Digital modulation signals such as FSK are time-varying signals that can he represented in the time-frequency representation. The smooth lag-windowed Wigner-Ville distribution (SLWWVD) is proposed as a method to obtain accurate time-frequency representation of FSK signals used in HF (High Frequency) radio communications. Unlike existing time-frequency distributions such as the windowed Wigner-Ville distribution (WWVD) or the smooth windowed Wigner- Ville distributioii (SWWVD). the proposed timefrequency distribution does not require priori knowledge of the signal modulation parameters such as the hitduration and subcarrier frequencies. The algorithm generates the time-frequency representation directly based on the signal characteristics. Comparison based on mainlobe width and signal-to-interference ratio shows the SLWWVD generate accurate time-hquency representation for simulated and actual communication signals.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:2098
Deposited By: Dr Zaharuddin Mohamed
Deposited On:23 Mar 2007 00:44
Last Modified:01 Jun 2010 03:00

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