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Optimization of the Ratio of Sampling Rate to Quantization Level for the Reconstruction of Audio Signal

[ Vol. 9 , Issue. 1 ]

Author(s):

Md. Salim Raza*, Nahid Hasan, Sayed Tonmoy Ahamed, Kazi Ghulam Mostafa and Mohammad Rabiul Alam   Pages 111 - 123 ( 13 )

Abstract:


Background & Objective: In this research work, the basic digital communication system with frequency shift keying modulation technique has been implemented in MATLAB. The same sinusoidal signal in audio frequency range has been transmitted and reconstructed with the different number of quantization level and sampling rate, where sampling frequency has been taken according to the Nyquist theorem. It has been seen that reconstructed signal at low data rate has appeared with better resolution compared with the reconstructed signal at the high data rate.

Results and Conclusion: In this regard, it is evident that the resolution of a reconstructed signal not only depends on data rate but it also depends on the ratio of sampling rate to quantization level. So it is required to optimize the ratio of sampling rate to quantization level before transmitting audio signal.

Keywords:

Analog to digital converter, digital to analog converter, frequency shift keying, quantization level, reconstructed signal, sampling rate.

Affiliation:

Department of Electrical & Electronic Engineering, Faculty of Science, Engineering & Technology, Hamdard University Bangladesh, Munshiganj-1510, Department of Electrical & Electronic Engineering, Faculty of Science, Engineering & Technology, Hamdard University Bangladesh, Munshiganj-1510, Department of Electrical & Electronic Engineering, Faculty of Science, Engineering & Technology, Hamdard University Bangladesh, Munshiganj-1510, Department of Electrical & Electronic Engineering, Faculty of Science, Engineering & Technology, Hamdard University Bangladesh, Munshiganj-1510, Department of Electrical & Electronic Engineering, Faculty of Science, Engineering & Technology, Hamdard University Bangladesh, Munshiganj-1510



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