In this letter, we propose a simple frequency-domain interpolation technique for the discrete Fourier transform (DFT). This interpolation technique can significantly improve the frequency and phase resolution capabilities of the DFT without increasing the size of the DFT (the number of points used for the DFT). This new technique employs a dividing point in the amplitude and phase spectra. Suitable areas of application include joint estimation of fine frequency and phase offsets in burst-mode digital transmission.
Bibliographical noteFunding Information:
Paper approved by A. Ahlen, the Editor for Modulation and Signal Design of the IEEE Communications Society. Manuscript received September 15, 2001; revised June 15, 2002 and October 15, 2002. This work was supported in part by Brain Korea 21 Projects, and in part by LG Electronics.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering