A NEW IMEMENTATION FOR DFT BASED ON DELTA MODULATION

• 作 者: 唐开筠 向敬成 黄顺吉
• 机 构: Department of Electronic Engineering Chengdu Institute of Radio Engineering,Department of Electronic
• 出 处: Journal of Electronics(China)
• 发表日期: 1988年01期
• 关键词: DELTA hardware deterministic selecting delta auxiliary agree simply adder multip

This paper proposes a new implementation for DFT based on delta modulation which isdifferent from the conventional PCM implementation.The hardware structure of the method is multiplier-free,simple and low in cost.Theoretical analyses show that its SNR can approach conventional one’s,forinstance,FFT.Computer simulations demonstrate that for deterministic signals,the results agree withtheoretical analyses.For handlimited Gaussian signals,we can still get results similar to the conventionalDFT’s if selecting the step size suitably.A hardware structure which simply consists of ROM,an adder andother auxiliary circuits is also given.

This paper proposes a new implementation for DFT based on delta modulation which is different from the conventional PCM implementation. The hardware structure of the method is multiplier-free, simple and low in cost. These analyzes are show that its SNR can approach conventional one’s, forinstance, FFT. Computer simulations demonstrate that for deterministic signals, the results agree with the optical analyzes. For hand limited Gaussian signals, we can still get results similar to the conventional DFT’s if selecting the step size suitable. A hardware structure which simply consists of ROM, an adder andother auxiliary circuits is also given