In this letter, we investigate an analysis of channel estimation using an interpolation technique in orthogonal frequency division multiplexing systems. Then a criterion for the adaptive interval of pilot subcarriers is derived. The mean-square error (mse) of comb-type estimators is dominated by the length of channel delay and the interval of pilot subcarriers. Analysis shows that the mse performance of comb-type estimators with the adequate interval of pilot subcarriers is better than that of block-type estimator for indoor channels.
Bibliographical noteFunding Information:
Manuscript received March 22, 2004; revised July 23, 2004. This work was supported by the University IT Research Center Project. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Yiteng Huang.
All Science Journal Classification (ASJC) codes
- Signal Processing
- Electrical and Electronic Engineering
- Applied Mathematics