A lot of conventional algorithms have tried to cancel the residual frame synchronization error (RFSE), which causes the performance degradation of channel estimation when using interpolation between pilot sub-carriers in comb-type pilot-aided OFDM systems. Among them, a tracking method has been attractive to provide good performance by eliminating the effects of RFSE. However, it requires high computational complexity because of its compensation process including many complex multiplications. In this paper, we propose a new method which significantly reduces computational costs by adjusting the starting point of FFT window in order to compensate for the RFSE. For the performance verification, we apply the proposed method to the IEEE 802.16e mobile WiMAX system and estimate its computational power compared to the tracking method. Simulation and implementation results show that the proposed algorithm has the performance similar to the tracking method and is very efficient for low power implementation in comb-type pilot-aided OFDM systems because it consumes only 40.5% of the tracking method's power1.
Bibliographical noteFunding Information:
1This work was supported by the Ministry of Knowledge Economy (MKE), Korea, under the ITRC (Information Technology Research Center) support program supervised by the IITA (Institute of Information and Technology Assessment), and CAD tools were supported by IDEC. Seongjoo Lee is with the Department of Information and Communication Engineering, Sejong University, Seoul, 143-747, Korea (e-mail: email@example.com). Jaedeok Nam is with the Telecommunication Network, Samsung Electronics, Suwon, 443-742, Korea (e-mail: firstname.lastname@example.org). Yunho Jung is with the School of Electronics, Telecomm. & Computer Eng., Korea Aerospace University, Goyang, 412-791, Korea (e-mail: email@example.com). Jaeseok Kim is with the Department of Electrical and Electronic Engineering, Yonsei University, 120-749, Korea (e-mail: firstname.lastname@example.org) Contributed Paper Manuscript received September 30, 2009 0098 3063/09/$20.00 © 2009 IEEE
All Science Journal Classification (ASJC) codes
- Media Technology
- Electrical and Electronic Engineering