Comparison between the performance of spectrogram and multi-window spectrogram in digital modulated communication signals

• Main Authors: Tan Jo, Lynn, Sha'ameri, Ahmad Zuri
• Format: Conference or Workshop Item
• Language: English
• Published: 2007
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utm.my/id/eprint/7142/1/Comparison_Between_Performance_Spectrogram_Multi-Window.pdf; http://eprints.utm.my/id/eprint/7142/; http://dx.doi.org/10.1109/ICTMICC.2007.4448613
• Institution: Universiti Teknologi Malaysia

In this paper,we compare the performance of spectrogram and new variation of multi-windows(WM)spectrogram for various digital modulated signals.The windows used in the MW spectrogram are conbination of Slepian sequences instead of using all the sequences.The comparison in the time-frequency representation is made in terms of main-lobe width(WLM)and peak to side-lobe ratio(PSLR)of the signals used.In the presence of noise,performance is compared in terms of variance in the estimated from the instantaneous frequency.Bit duration and frequency are estimated from the time-frequency the instantaneous frequency(IF),which is derived from the time-frequency representation.The bias in the estimated bit duration is also calculated to compare the performance between spectrogram and WM spectrogram. In general,the time-frequency representation for the spectrogram is better than WM spectrogram.However,WM spectrogram is superior to spectrogram in terms of bit duration estimation.