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

Author(s): Md. Salim Raza*, Nahid Hasan, Sayed Tonmoy Ahamed, Kazi Ghulam Mostafa, Mohammad Rabiul Alam

Journal Name: International Journal of Sensors, Wireless Communications and Control

Volume 9 , Issue 1 , 2019


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Graphical Abstract:


Abstract:

Background & Objective: In this research work, the basic digital communication system with frequency shift keying modulation technique has been implemented in MATLAB.

Methods: 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.

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Article Details

VOLUME: 9
ISSUE: 1
Year: 2019
Published on: 14 July, 2019
Page: [111 - 123]
Pages: 13
DOI: 10.2174/2210327908666180817103609
Price: $25

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