A NEW MULTIPLIER-FREE STRUCTURE FOR DFT BASED ON DELTA MODULATION

Tang Kaijun; Xiang Jingcheng; Huang Shunji

Volume 9 Issue 1

Jan. 1987

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Tang Kaijun, Xiang Jingcheng, Huang Shunji. A NEW MULTIPLIER-FREE STRUCTURE FOR DFT BASED ON DELTA MODULATION[J]. Journal of Electronics & Information Technology, 1987, 9(1): 1-10.

Citation:

Tang Kaijun, Xiang Jingcheng, Huang Shunji. A NEW MULTIPLIER-FREE STRUCTURE FOR DFT BASED ON DELTA MODULATION[J]. Journal of Electronics & Information Technology, 1987, 9(1): 1-10.

Tang Kaijun, Xiang Jingcheng, Huang Shunji. A NEW MULTIPLIER-FREE STRUCTURE FOR DFT BASED ON DELTA MODULATION[J]. Journal of Electronics & Information Technology, 1987, 9(1): 1-10.

Citation:

Tang Kaijun, Xiang Jingcheng, Huang Shunji. A NEW MULTIPLIER-FREE STRUCTURE FOR DFT BASED ON DELTA MODULATION[J]. Journal of Electronics & Information Technology, 1987, 9(1): 1-10.

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A NEW MULTIPLIER-FREE STRUCTURE FOR DFT BASED ON DELTA MODULATION

Received Date: 1984-12-30
Rev Recd Date: 1986-06-20
Publish Date: 1987-01-19

Abstract

Abstract

A new implementation of the DFT based on delta modulation (DM) is proposed. It is different from the conventional implementation based on PCM. The hardware structure of the method is constructed without A/D converter and multiplier, so it is simpler and of lower cost. Its SNR can approach that of the conventional one, such as FFT. Computer simulations demonstrate that for deterministic signals, results obtained agree well with theoretical analyses, for band-limited Gaussian signals; if step size is suitably selected, results similar to the conventional DFT can still be obtained. Because of the limitation of the working speed of the device, this method will be suitable for processing speech and seismic signals. Finally, the hardware structure which simply consists of a ROM, an adder and some other auxiliary circuits is given.

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References(1)

References

A. V. Oppeiheim and R. W. Schafer, Digital Signal Processing, Englewood Cliffs, NJ, Prentice-Hall, 1975.[2]N. Kouvaras, The Radio and Electronic Engineer.,48(1978), 431-8.[3]A. Peled and B. Liu, IEEE Trans. on AU, AU-21(1978), 477-84.[4]D. Prezas and J. L. Locicero, IEEE Trans. on COM, COM-28(1980), 801-6[5]A. I. Abu-El-Haija, K. Shenoi and A. M. Peterson, IEEE Trans. on CAS, CAS-25(1978), 593-9.[6]Xiang Jingcheng, Lu Tiecheng, F. S. Hill, Jr. and L. E. Franks, A New Digital Transversal Filter Implementation Based on Delta Modulation Encoding, CANCOE, IEEE, 1982, pp. 328-31.[7]向敬成,成都电讯工程学院学报,1984年,第1期,第11-20页.[8]J. E. Abate, Proc. IEEE, 55(1967), 298-308.[9]J. B. ONeal, Bell Sys. Tech. J., 45(1966), 117-41.

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